The diameter of the earth's moon is about 1/4 that of the sun, the largest among the inner planets this fact is the exception to the rule in our solar system.
There are some notable exceptions to the principles in the largely ordered solar system. For instance, only Earth has a huge moon among the inner planets, while Uranus is tipped on its side. A successful theory must explain the general laws while still allowing for deviations.
Particularly during the intense bombardment that took place early in the solar system's history, the majority of the outliers most likely resulted from collisions or close encounters with remnant planetesimals. Our Moon most likely formed as a result of a massive collision between a planetesimal the size of Mars and the young Earth.
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A subsistence farmer in the Amazon River basin in Brazil practices slash-and-burn farming. Where is he most likely to locate his crops? (11B)answer choicesNear a road for easy access to marketsNear a city for easy access to equipmentNear his home for easy access to his fieldsNear the forest for easy access to newly cleared land
A subsistence farmer in the Amazon River basin in Brazil would most likely locate his crops "near the forest so that he has easy access to newly cleared land" for his slash-and-burn farming technique. Thus, Option D is correct.
The farmer needs to be close to the forest in order to cut down the trees and clear the land for planting. This is a common farming practice among subsistence farmers in the Amazon River basin in Brazil, as it allows them to cultivate crops in a new area every year while allowing the previous area to regrow and regain its fertility.
The farmer wants to make the most out of the limited resources he has, which is why he chooses to locate his crops near the forest for easy access to newly cleared land. This allows him to maximize his yields and ensure a consistent source of food for himself and his family.
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What are the basic earth retaining structure?
The basic earth retaining structures include gravity walls, cantilever walls, sheet pile walls, anchored walls, and gabion walls.
Earth retaining structures are used to provide support to soil, rock or other materials and prevent their movement, especially when there is a change in ground elevation. The most common types of retaining structures are:
Gravity walls: These are the most simple and common type of earth retaining structures. They rely on their weight and mass to resist the pressure of soil or water.
Cantilever walls: These walls are made of reinforced concrete and steel and are designed to resist the pressure of soil and water by using the principle of leverage. Sheet pile walls: These walls are made of steel, wood, or concrete and are used to resist the pressure of soil and water by interlocking each other.
Anchored walls: These walls are constructed by embedding steel cables or rods in the soil and then anchoring them to a concrete wall. Gabion walls: These walls are made by filling wire baskets with rocks, and they are used to resist the pressure of soil and water.
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the three most important elements that make up weather are..precipitation, wind, and temperature.
The statement the three most important elements that makeup weather are..precipitation, wind, and temperature is true.
The term "weather" refers to the momentary characteristics of the lower atmosphere, such as precipitation, temperature, humidity, wind speed, direction, and atmospheric pressure. It might be sunny, cloudy, rainy, foggy, chilly, scorching, windy, stormy, or snowing. the list continues.
By heating air in the lower atmosphere at different rates, the sun causes various weather patterns.
The wind is created when warm air rises and is quickly replaced by cold air. These winds affect the development and movement of clouds, precipitation, and storms along with the air's water vapor content.
The weather is constantly changing because of the constantly shifting atmospheric factors that affect it. Forecasting the weather for the coming days or weeks requires the analysis of data from satellites, weather stations, and buoys.
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The three most important elements that makeup weather are..precipitation, wind, and temperature.
T/F
where to get crimson witch of flames
The Crimson Witch of Flames is a set of artifacts in the game, Genshin Impact. It can be obtained by defeating bosses in the game or by exchanging materials with the game's currency at the Souvenir Shop in Mondstadt or Liyue.
It is also possible to obtain the Crimson Witch of Flames set from the game's Wish system, which is a gacha-style mechanic where players can spend currency to obtain random items.
Overall, the best way to obtain the Crimson Witch of Flames set is by playing the game and defeating bosses in the game
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How would the amount of incoming solar radiation change at the equator if Earth's axis were vertical instead of tilted? Why? a) Incoming solar radiation would decrease. b) Incoming solar radiation would be the same as at present. c) Incoming solar radiation would increase.
The amount of incoming solar radiation change would increase at the equator if Earth's axis were vertical instead of tilted. The correct answer is C.
The equator receives more solar energy than the poles due to the tilted axis of the Earth, which also causes seasonal and latitudinal temperature change. The equator would experience more intense and constant solar radiation if the axis were vertical, which would result in a more even distribution of energy and more solar radiation entering the atmosphere.
On the world's climate and weather patterns, this would have a tremendous effect. Solar radiation impact is the term used to describe changes in the amount of solar radiation that arrives at a particular point as a result of a variety of variables, such as shifts in the Earth's axis, orbit, and atmosphere.
The weather, ecosystems, and global climate patterns may all be significantly impacted by these changes. An essential component of Earth science research is determining how solar radiation affects the planet.
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What is the north-south coordinate of the South Pole?
The North-South coordinate of the South Pole is 90 degrees South (90°S).
The southernmost point on Earth's surface, known as the South Pole, is found at its core. At a latitude of 90 degrees South (90°S), it is the location where all lines of longitude converge. The continent of Antarctica, where the South Pole is situated, experiences exceptionally low winter temperatures and is covered in ice and snow for a large portion of the year. Several research stations have been erected at the South Pole to study a variety of subjects, including astronomy, climate change, and geology. This site is significant for scientific research. Also, it is a well-liked vacation spot for explorers and adventurers who are drawn to the area's untamed terrain.
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What time is the total lunar eclipse in Illinois?
The total lunar eclipse in Illinois will occur on January 20th, 2019 at 9:15 PM CST. During this eclipse, the moon will be totally eclipsed by the Earth's shadow for 1 hour and 2 minutes.
The time of a total lunar eclipse varies depending on the date and location. Without this information, it is impossible to accurately answer the question. However, a total lunar eclipse occurs when the moon passes directly behind the Earth and into its shadow. This can only happen when the sun, Earth, and moon are aligned or nearly aligned.
Total lunar eclipses are relatively rare, occurring only once every few years. To find the specific time of a total lunar eclipse in Illinois, you can check local astronomical calendars or websites for the date and time of the next total lunar eclipse.
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Section Two - Vocabulary
Match the word on the left with the definition on the right.
black dwarf
e. star left at the core of a planetary nebula
white dwarf
g. a red super giant star explodes
nebula
C.
what a medium-mass star becomes at the end of its life
_ protostar
b. a large cloud of gas or dust in space
_ supernova
a. exerts such a strong gravitational pull that no light escapes
neutron star
d. the earliest stage of a star 's life
black hole
f. the remains of a high mass star
The correct matching of the terms given below:
black dwarf - e. star left at the core of a planetary nebulawhite dwarf - C. what a medium-mass star becomes at the end of its lifenebula - b. a large cloud of gas or dust in spaceprotostar - d. the earliest stage of a star's lifesupernova - g. a red super giant star explodeneutron star - f. the remains of a high mass starblack hole - a. exerts such a strong gravitational pull that no light escapesWhat is a Star?An astronomical object known as a star is made up of a bright plasma spheroid that is held together by gravity.
The Sun is the star that is closest to Earth. Other stars are also visible at night with the unaided eye, but because to their great distances from Earth, they appear as stationary points of light.
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geologists of the mid-twentieth century determined that the ocean floor was much older than the centers of continents.
Geologists of the mid-twentieth century determined that the ocean floor was much older than the centers of continents .false
Geologists are scientists who study the solid, liquid, and gaseous matter that makes up Earth and other terrestrial planets, as well as the processes that shape them.
Geologists typically major in geology, earth science, or geophysics, though training in physics, chemistry, biology, and other sciences is also advantageous. Although many subdisciplines incorporate laboratory and digitalized work, field research (field work) is an important component of geology. Geologists are part of a larger group of scientists known as geoscientists.
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Full Question: geologists of the mid-twentieth century determined that the ocean floor was much older than the centers of continents. True / False
Norwegian city located on an island off mainland Norway crossword clue DTC Archaeology Adventure Pack
Trondheim is the name of a city in Norway that is situated on an island near the mainland.
The medieval city of Trondheim was established in the 11th century, and it served as Norway's capital throughout the Viking Age. It is situated between mountains and forests on the Trondheim Fjord's southern shore.
Although Trondheim is not literally an island, it is situated on a peninsula that is surrounded by water almost entirely.
A number of smaller islands, like Munkholmen, which was formerly used as a fortification and a location for executions, are also close to the city.
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The image shows a house which both active and passive solar heating in its design. The solar panels absorb sunlight that is later used to heat the house directly. The trees provide shade preventing heat of the house in the summer. How does the tree help passive heating of the house in the winter?
Trees can cool the surrounding air by up to 5 C through evapotranspiration. Trees may significantly limit the quantity of direct solar radiation that reaches outdoor ground surfaces or provides.
A solar panel, also known as a photovoltaic panel, is a device that converts sunlight into electricity. It consists of multiple solar cells, which are made of semiconductor materials like silicon, and arranged in a grid-like pattern. When sunlight falls on the panel, it energizes the electrons in the solar cells, producing a flow of electricity. This electricity can be used to power homes, businesses, and even vehicles.
Solar panels are typically installed on rooftops or on open fields, where they receive maximum exposure to sunlight. They are an eco-friendly and renewable energy source, as they do not emit harmful greenhouse gases or pollutants like fossil fuels. They also require little maintenance, have a long lifespan, and can save money on energy bills over time.
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Which power of a telescope might be expressed as "0.5 seconds of arc"?
The power of a telescope is typically expressed in terms of its resolving power or angular resolution, which is the smallest angle between two points that the telescope can distinguish.
The term "0.5 seconds of arc" refers to the angular resolution of a telescope and represents the smallest angle that the telescope can distinguish between two points in the sky. This angular resolution is typically dependent on the size of the telescope's aperture or lens diameter, and the wavelength of the light being observed. A smaller angular resolution means that the telescope can distinguish finer details in the observed object. Thus, a telescope with an angular resolution of 0.5 seconds of arc would be able to distinguish between two points in the sky that are separated by a distance of 0.5 seconds of arc, which is a very small angle. This is an important factor for astronomers who want to study objects with high levels of detail.
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How did Eisenhower’s advice to the president influence the decision to drop the atomic bomb on Japan?
due today please help
Answer: The president cannot declare war on Japan in this case. It is the Congress that has the authority over that. So, the atomic bomb decision would more likely than not be approved by the Congress, not the President.
Explanation: From the Article of Confederation and the Constitutional amendments, it clearly states that, as only Congress could declare war, that would mean that because dropping an atomic bomb is an act of war, only the Congress may have the full authority. The Department of Defense from the Pentagon is responsible for carrying out the war, only when approved by the Congress to do so.
The president cannot declare war on Japan in this case. It is Congress that has the authority over that. So, the atomic bomb decision would more likely than not be approved by Congress or Eisenhower, not the President.
Who was Eisenhower?The 34th president of the United States, Dwight David "Ike" Eisenhower, was an American military officer and statesman who presided over the country from 1953 to 1961. He held the five-star rank of General of the Army and served as Supreme Commander of the Allied Expeditionary Force in Europe during World War II.
Two of the most important military operations of World War II were planned and executed by Eisenhower: Operation Torch in the North Africa campaign in 1942–1943 and the D-Day invasion of Normandy in 1944.
He was chosen as the 34th President of the United States in 1952. Among his many achievements during his two terms as president, Eisenhower signed the 1957 Civil Rights Act, founded NASA, and built the Interstate Highway System.
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what was the breakthrough observation that led to the theory of plate tectonics?
The breakthrough observation that led to the theory of plate tectonics was the discovery of magnetic reversals in ocean rocks.
This allowed scientists to determine the age of the rocks and to realize that the ocean floor was not static, but was in fact spreading outward from the center of the ocean.
Additionally, scientists observed the mid-ocean ridges, which are regions of active volcanism that form at the boundaries between tectonic plates. This was further evidence that the ocean floor was not static, but was in fact in constant motion.
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what causes convection currents to form in the ocean?
Uneven heating causes viscosity differences in the water which causes convection currents. Viscosity differences cause convection currents to form in the ocean.
Convection currents are the result of discriminational heating. Lighter( less thick), warm material rises while heavier( thick) cool material sinks. It's this movement that creates rotation patterns known as convection currents in the atmosphere, in water, and in the mantle of Earth.
Convection currents are heat-driven cycles that do in the air, ocean, and mantle. They're caused by a difference in temperature, frequently due to differing propinquity to a heat source. The difference in temperature relates directly to the viscosity of the material, causing this effect.
Water is warmed by the energy from the sun. When this warm water loses heat and cools, it becomes thick and begins to sink down. This constant exchange of heat energy creates convection currents as warm water rises and cold water cesspools. Ocean swells are caused by wind moving across the face of the water. The disunion between the air motes and the water motes causes energy to be transferred from the wind to the water. This causes swells to form.
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at which of these times of day would you expect to find the sun in the east?
a. 06.00
b. 06.30
c. 07.00
d. 05.30
05.30
When it comes to sunset, June and December have different times. When compared to June, the sunset occurs earlier in December. (Summer days are longer than winter days in comparison.)
All year round, there are 12 hours of daylight (whether it is January or June). Thus, there will be 50% sunshine and 50% night-time at the equator (12 hours of day and 12 hours of night).
On Earth, the time of day when a certain location sees natural sunlight from the sun is typically referred to as "daytime." There is some kind of daytime on other planets and satellites as well. When the sun rises over the horizon, the day begins. It concludes when the sun sets below the horizon.
About half of the world is lighted by sunlight at any given moment. The overall area lighted by the sun at any point is somewhat more than half of the planet, but the ideal region susceptible to direct illumination is exactly half of the world. Indirect illumination may occur due to atmospheric variables and other causes.
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Are the Galapagos Islands off the coast of California?
The Galapagos Islands are unnoticed archipelago that lies off the southern coast of California.
Around 1,000 kilometres from the coast of Ecuador, in the Pacific Ocean, are the Galapagos Islands. Its archipelago and its enormous marine reserve are referred to be a "living museum and exhibition of evolution" for their singularity.
Channel Islands National Park, known as the "Galapagos of the North," is located in the Pacific Ocean, right off the Californian coast of Ventura. They are made up of the waters up to one nautical mile from each of the five islands: Anacapa, Santa Barbara, Santa Cruz, San Miguel, and Santa Rosa.
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What can a geologist understand by studying the fossil composition of sedimentary rocks? answer choices. A. how animals built their shelters.B. can determine some aspects of the paleoenvironment.C. found that higher plant and bryophyte species composition is similar on rocksD. built up layer upon layer
Found that higher plant and bryophyte species composition is similar on rocks a geologist understand by studying the fossil composition of sedimentary rocks. In this case option C is correct.
Sedimentary rocks are created on or very close to the Earth's surface, as opposed to igneous and metamorphic rocks, which are created very deep within the Earth.
Wind and rain's effects, which gradually reduce large rocks into smaller ones, are examples of erosion and weathering. Boulders, even mountains, are turned into sediments like sand or mud by erosion and weathering.
Chemical weathering is a type of dissolution. This method involves the gradual erosion of stone by slightly acidic water. For new, sedimentary rocks, these three processes produce the necessary components.
New rocks or minerals are created through lithification and precipitation. Rocks form during precipitation.
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The type of soil most likely to result in a trench cave-in is _________.
answer choices
solid rock
Type A
Type B
Type C
The type of soil most likely to result in a trench cave-in is Type C.
There are three types of soils: Type A, Type B, and Type C. The most stable soil for excavation is type A soil. The least stable soil is Type C. It's crucial to keep in mind that a trench might be carved through different kinds of soil.
The least stable sort of soil is type C. Type C soils comprise cohesive soils with a low unconfined compressive strength—0.5 tons per square foot or less—and granular soils in which particles do not adhere to one another. Sand and gravel are examples of Type C soil. Regardless of its other qualities, soil with water seeping through it is automatically categorised as Type C soil because it is unstable.
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The Yellowstone volcano is going to erupt in 3 hours, what do you do?
In the event that the Yellowstone volcano is going to erupt in 3 hours, it is important to act quickly and safely. The first step is to contact your local authorities, who can provide more detailed information on evacuation plans and other safety measures.
Additionally, the US Geological Survey's website has more information on the volcano, its eruption history, and safety protocols in the event of an eruption. Lastly, it is important to stay informed by following local media outlets and by listening to local authorities.
If a volcano, such as the Yellowstone volcano, were to erupt, it is important to follow the instructions of local authorities and emergency responders. This may include evacuating the area, seeking shelter, and following any other safety precautions that are recommended.
It is also important to stay informed about the situation through reliable news sources and to communicate with loved ones to ensure their safety. Remember that volcanic eruptions can be extremely dangerous and it is important to take them seriously and to be prepared.
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What is a worldview?a. Worldview includes only the religious assumptions and beliefs that guide health decisions.b. Worldview includes only the religious assumptions and beliefs that express how people see, interpret, and explain their experiences.c. Worldview is the cultural assumptions and beliefs that express how people see, interpret, and explain their experiences.d. Worldview is the cultural assumptions and beliefs that are not cultural or religious in nature, but rather a predetermined view of fate.
Worldview is the cultural assumptions and beliefs that express how people see, interpret, and explain their experiences. In this case, Option C is correct.
An individual's or a society's fundamental cognitive orientation, also known as a worldview, worldview, or Weltanschauung, encompasses all of that person's or society's knowledge, culture, and point of view.
] A worldview may consist of natural philosophy, fundamental, existential, and normative postulates, as well as themes, values, emotions, and ethical principles.
The German concept of Weltanschauung is used in cognitive science and philosophy. This phrase describes the "wide worldview" or "wide world perception" of a group of people, a family, or an individual. The worldview of a people is the result of their distinct world experience, which they have had over many centuries. In the form of its syntactic structures, incomparable connotations, and denotations, a language of a people reflects the worldview of that people
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a fixed crystalline structure.Choose matching term1The change in the viscosity of a melt is directly proportional to the change in2What does grain size generally indicate about the cooling of a melt?3A mineral, as geologists understand the term, is a naturally occurring solid substance with a definable chemical composition and4Rank each lava type according to the relative distance it can generally travel from a volcano vent before solidifying.
The change in the viscosity of a melt is directly proportional to the change in temperature. As the temperature of a melt increases, its viscosity decreases, which can affect its behavior during cooling and solidification.
Grain size generally indicates the cooling rate of a melt. Slower cooling rates allow for larger crystals to form, while faster cooling rates result in smaller crystals or even a glassy texture. Therefore, a large grain size indicates slower cooling, while a small grain size indicates faster cooling.
A mineral, as geologists understand the term, is a naturally occurring solid substance with a definable chemical composition and a fixed crystalline structure. Minerals can form through a variety of processes, including crystallization from a melt or solution, precipitation from a gas, or even biologically through the activities of organisms.
The relative distance that lava can travel from a volcano vent before solidifying depends on its viscosity, which is in turn determined by its composition, temperature, and gas content. Therefore, lava types can be ranked from most to least viscous, and this can give an indication of their relative distance of travel. The ranking from most to least viscous is: (1) aa lava, (2) pahoehoe lava, and (3) pillow lava. Aa lava is the most viscous and tends to move slower and build up thicker piles, while pillow lava is the least viscous and can flow further distances before solidifying. Pahoehoe lava is intermediate in viscosity and can form both smooth, rope-like structures as well as more rugged surfaces.
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What are the 4 stages of the Korean War?
The 4 stages of the Korean War lasted from 1950-1953 and can be divided into four distinct stages, June 1950, November 1950, January 1951 and July 1953.
The Korean war stages are as follows:
1. June 1950 - November 1950: The North Korean Invasion. This was the initial phase of the war when North Korean forces crossed the 38th Parallel and invaded South Korea.
2. November 1950 - January 1951: The Chinese Intervention. Chinese forces crossed the Yalu River and began supporting North Korea in the war effort.
3. January 1951 - July 1953: The Stalemate. Following the Chinese intervention, the war settled into a stalemate between North and South Korean forces.
4. July 1953 - October 1953: The Armistice. Following lengthy negotiations, the Korean Armistice Agreement was signed and a ceasefire was declared, ending the war.
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What mountain range runs through the United States from Canada to Mexico?
The Rockies mountain range runs through the United States from Canada to Mexico.
The Rockies Mountains are a part of a system of parallel mountain ranges known as the Cordilleras which is a long series of mountains. Cordilleras exists all over the world, in North America it indicates a long range of mountains in the western part of the continent. The Cordilleras extend from Canada to Panama. The Rockies stretch from the provincial state of Canada to the new Mexico in U.S. The Rockies is a young mountain of the west. The stretch of these mountains is around 3000 miles, The range offers shelter to various wildlife, alpine lakes and wilderness. It is fold mountain which is a result of collusion pacific and North American plates.
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as one moves away from the equator during the equinoxes, the ____________ will ____________ .
as one moves away from the equator during the equinoxes, the length of daylight will decrease.
As one moves away from the equator during the equinoxes (around March 20th or September 22nd), the following changes occur:
Length of daylight: The length of daylight decreases as one moves away from the equator. This is because the Sun's rays hit the Earth's surface at a lower angle, causing the length of daylight to shorten.
Sun's angle in the sky: The Sun's angle in the sky becomes lower as one moves away from the equator, which results in longer shadows and less direct sunlight.
Temperature: The temperature becomes cooler as one moves away from the equator, due to the decrease in the Sun's angle and the reduction in the amount of sunlight.
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The genetic scheme for classifying rocks is based on Choose one: A. the average grain size. B. temperature and pressure. C. mineral (and therefore elemental) composition. D. the origin of formation.
The genetic scheme for classifying rocks is based on C. mineral (and therefore elemental) composition.
What is mineral composition?
Mineral composition refers to the specific types and proportions of minerals present in a rock or mineral sample. It is a critical factor in determining the rock's classification, properties, and potential use. The mineral composition of a rock influences its appearance, texture, and behavior and provides information about its formation history and origin. Understanding the mineral composition of rocks is important for various industries, including geology, mining, and construction. It is also essential for identifying minerals that may have commercial or industrial value. As a result, mineral composition is an important tool for understanding the earth's geology and resources.
Hence, the answer is C. mineral (and therefore elemental) composition.
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the day with the smallest number of daylight hours over the course of the year for a person living in the northern hemisphere is the ______
The day with the smallest number of daylight hours over the course of the year for a person living in the northern hemisphere is the winter solstice.
What is the winter solstice?
The winter solstice occurs when the tilt of the Earth's axis is farthest away from the sun, causing the shortest daylight hours of the year for people living in the northern hemisphere. On the winter solstice, the sun rises later and sets earlier, leading to fewer hours of daylight. The exact date of the winter solstice can vary slightly from year to year, but it typically occurs on December 20th or 21st.
Hence, the answer is, the day with the smallest number of daylight hours over the course of the year for a person living in the northern hemisphere is the winter solstice.
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the solar panels absorb sunlight that is later used to heat the house directly. the tree provides shade preventing heating of the house in the summer. how does the tree help in passive heating of the house in winter?
When deciduous trees lose their leaves in winter, they let the sun's warming rays through and help warm the home. Trees save energy by providing cooling in the warmer months and provide respite from the wind in the winter.
Trees improve our air quality by filtering harmful dust and pollutants such as ozone, carbon monoxide and sulfur dioxide from the air we breathe. Trees give off the oxygen we breathe. They absorb water and release it as water vapor through their leaves in a process called evaporation, creating a cooling effect.
Trees also provide shade to land and buildings, which increases cooling and reduces energy consumption. This results in burning less fossil fuels to produce electricity for cooling and heating.
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this figure shows the main subdivisions of the geologic timescale. which of these is the mesozoic?
A)Cenozoic
B)Mesozoic
C)Paleozoic
D)Precambrian
The Mesozoic Era is the middle subdivision of the geologic timescale, lasting from 251 million years ago to 65 million years ago. Thus, Option B is correct.
This era is often referred to as the "Age of Dinosaurs" because it was during this time that dinosaurs dominated the earth as well as many other species of reptiles.
There are three eras in the Mesozoic Era:
The TriassicJurassicCretaceousDuring this time, the earths land masses were still mostly connected and formed the supercontinent of Pangea. The climate was warm and humid, leading to the evolution of many different types of plants and animals. The end of the Mesozoic Era is marked by the extinction of the dinosaurs likely due to a massive asteroid impact.
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Which of these major animal body plans evolved since the Cambrian period about 550 million years ago?Which of these major animal body plans evolved since the Cambrian period about 550 million years ago?a.Body symmetryb.Segmentationc.Cephalization with nervous systemd.Almost all the major phylum-level body plans arose rapidly during the Cambrian.
Almost all the major phylum-level body plans arose rapidly during the Cambrian. So, option D is correct alternative.
About 550 million years ago, during the Cambrian period, the majority of the major phylum-level body designs emerged quickly. This covers the development of body symmetry, segmentation, cephalization with nervous system, and other crucial traits that set various animal groupings apart. Arthropoda, Chordata, Echinodermata, Mollusca, and Annelida are a few of the significant phyla that were among those to arise during the Cambrian explosion. An important turning point in the development of complex life forms was reached during the Cambrian explosion, a time of tremendous animal diversification on Earth.
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