Explain why light traveling through an eyeglass lens refracts.

Answer:

:')

Explanation:

lack of membrane-bound organelles, unicellular and small size.

Answer:

There are three notable common traits of bacteria, 1) lack of membrane-bound organelles, 2) unicellular and 3) small (usually microscopic) size. Not all prokaryotes are bacteria, some are archaea, which although they share common physicals features to bacteria, are ancestrally different from bacteria.

Answer:

12

Explanation:

Answer:

ll living things are composed of cells. This is one of the tenets of the Cell Theory, a basic theory of biology. This remarkable fact was first discovered some 300 years ago and continues to be a source of wonder and research today. Cell biology is an extremely active area of study and helps us answer such fundamental questions as how organisms function. Through an understanding of how cells function we can discover how human ailments, such as cancer and AIDS, can be possibly treated.

THE CELL THEORY

All life is composed of cells

Cells are the fundamental units which possess all the characteristics of living things

New cells can only come into existence by the division of previously existing cells

Notice that this scientific concept about life is called a theory. In science, unlike the layman’s definition, the word theory is used for a hypothesis about which there is a large body of convincing evidence. Under experimental conditions all observations have thus far confirmed the theory. The evidence that helped formulate the theory was obtained using the microscope. The microscope is of enormous importance to biology and has extended our ability to see beyond the scope of the naked eye.

When we look at cells under the microscope, our usual measurements fail to work. In science, the metric system is used to measure objects and, as you will see, is vastly superior to our antiquated English system of measurement. Here are the basic units:

Length Volume Weight

1 meter (m) 1 liter (L) 1 gram (g)

1 millimeter (mm) = 0.001 m or 10−3 m or 1/1,000 m 1 milliliter (ml) = 0.001 L or 10−3 L 1 milligram (mg) = 0.001 g or 10−3 g

1 micrometer (mm)= 0.000001 m or 10−6 m or 1/1,000,000 m 1 microliter (ml) = 0.000001 L or 10−6 L 1 microgram (mg) = 0.000001 g or 10−6 g

1 nanometer (nm)= 0.000000001 m or 10−9 m or 1/1,000,000,000 m  

There is also a different scale for temperature: Celcius.

100˚ Celcius (C) = water boiling (equivalent to 212˚ F)

0˚ C = water freezing (equivalent to 32˚ F)

Converting between units can be confusing. The most effective way to do this is by using conversion factors and canceling units. For example, if you want to know how many liters are in 425 milliliters, you can set up a simple equation that looks like this.

[latex]\displaystyle{425}\text{ ml}\times\frac{1\text{ liter}}{1000\text{ ml}}=\frac{425\text{ ml}}{1000\text{ ml}}=0.425\text{ L}[/latex]

PRACTICE

1.2 mm = ________ mm 0.224 m = ________ mm 225 nm =___________mm

0.023 L = ________ ml 750 ml = _________L 50 ml       =___________ L

Part 1: Microscope Parts

Nikon microscope with parts labelled. The compound microscope is a precision instrument. Treat it with respect. When carrying it, always use two hands, one on the base and one on the neck.

The microscope consists of a stand (base + neck), on which is mounted the stage (for holding microscope slides) and lenses. The lens that you look through is the ocular (paired in binocular scopes); the lens that focuses on the specimen is the objective.

Your microscope has four objectives of varying magnifications (4x, 10x, 40x, and 100x) mounted on a revolving nosepiece. The 100x objective is a special oil immersion objective that needs to be used with oil—we won’t use the oil immersion objective for this course.

Positioning the specimen requires that you turn the mechanical stage controls, which operate the slide bracket on the surface of the stage. One control moves the specimen in the x-direction, and the other moves the specimen in the y-direction.

Focusing on the specimen is achieved by knobs that move the stage up and down, so that it is closer or farther from the objective. There are two knobs, an outer coarse focus and an inner fine focus.

The substage condenser directs light through the slide into the objective. An iris diaphragm on the substage condenser controls the amount of light reaching the objective, and also affects the contrast of the specimen.

Part 2: Magnification

The compound microscope has two sets of lenses; the ocular lens (or eye piece) which magnifies an object 10 times its normal size, and the objective lenses located on a revolving nosepiece. Rotate the nosepiece and notice how each objective lens clicks into place. Each objective lens has a different magnification of power written on it (such as 4, 10, 40, or 100). This number is the power of magnification for each of the objective lenses. For total magnification multiply the ocular power (10x) times the objective lens that is in place. For example, if you have a 10x ocular and a 10x objective, the total magnification is: 10x × 10x = 100x.

Answer: the scorching sun

Explanation:   As the prairies are under the most sunny regions of America

It should be A and C.

precipitation

Explanation:

Solar energy grants high-quality quantities of electricity to Earth each day maximum of which is going to the sea which cowl 75% of the Earth the daylight heats up the water inflicting it to evaporate because the water this is now withinside the shape of a fuel line Rises to the top atmospheres and condensates as it's miles condensation it will become dense and begins off evolved to precipitate on a mountain or everywhere on Earth for that depend supposing the water this is now precipitate lands Mountain which comes down as a shape of Water via way of means of a river that flows down that.

The river water reaches the sea and it occurs again and again once more inflicting the water cycle to be powered via way of means of the solar electricity.

Solar energy is the energy provided by the sun capable of producing heat and causing a chemical reaction.

Hence it concluded that solar energy from the sun drives the water cycle.

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Answer:

High in the atmosphere, air pressure decreases. ... A low pressure system has lower pressure at its center than the areas around it. Winds blow towards the low pressure, and the air rises in the atmosphere where they meet. As the air rises, the water vapor within it condenses, forming clouds and often precipitation.

B) The air moves to the low pressure system, creating wind.

When a low air pressure system meets a high air pressure system, air from the high pressure system flows towards the low pressure system in an attempt to balance the pressure.

This movement of air creates wind. The stronger the difference in pressure, the stronger the wind. This is why wind speed is often stronger in areas with a large contrast in pressure, such as near fronts where a low pressure system meets a high pressure system.

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Answer:

Hydrogen-powered fuel cell electric vehicles emit none of these harmful substances—only water (H2O) and warm air

Explanation:

transportation sector accounts for about one-third of U.S. carbon dioxide emissions, using these sources to produce hydrogen for transportation can cut greenhouse gas emissions

Answer:

"Apart from fumes, there is also no air pollution from hydrogen fuel cell cars at all. Conventional cars emit gases that contribute to ozone layer depletion and also to the development of acid rain. Thus, there are many issues to the use of conventional gas that use fossil fuels which could be avoided by using hydrogen cars instead."

Explanation:

I used quotes because copying without quotes is illegal

Answer:

Producer and consumer

Explanation:

Answer:

Gravitropism (also known as geotropism) is a coordinated process of differential growth by a plant in response to gravity pulling on it. It also occurs in fungi. Gravity can be either "artificial gravity" or natural gravity. It is a general feature of all higher and many lower plants as well as other organisms.

Explanation:

i totally didnt copy and paste your answer into the search bar or anything

Answer:

....C

Explanation:

Answer:

option d...hope it helps and don'ts copy in the test

Answer:

energy levels.

Answer:

Manta ray and trigger fish

Explanation:

Both of these are feeding on primary consumers, which are consuming plants (the producers).

Answer:

14 atoms

Explanation:

Answer:

Inhalation

Explanation:

hope its correct

Answer:

HELLO!!!

SO UR ANSWER IS...

Taking in of air rich in oxygen into the body is called INHALATION.

Thanks I hope it helps

Answer:

Your answer should be C I believe

Answer:

Your answer is C).

All of the trees in an ecosystem are examples of the biotic factors in an ecosystem (Option D).

Biotic factors refer to the living components of an ecosystem, including all of the organisms that live within it. This can include plants, animals, fungi, and microorganisms. These living components interact with each other and with the non-living components of the ecosystem, known as the abiotic factors, to shape the ecosystem and maintain its balance.

For example, plants play a crucial role in the ecosystem by producing oxygen through photosynthesis and providing food and habitat for other organisms. Similarly, predators play an important role in maintaining the balance of populations of prey species. Biotic factors can also influence the physical environment, such as through the creation of soil through the decomposition of organic matter by microbes and other organisms.

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Answer:

A scientist might use a dichotomous key to classify an organism.

Explanation:

Dichotomous keys are used to identify organisms based on their observable traits.

Answer:

The life of a red blood cell is one of repetition and of enrichment. We begin at the heart, as an un-enrichied blood cell, we travel through the ventricles and into the lungs, we travel along the lung sack and become enriched with oxygen, the arteries are slow and calm as the human is not moving too often, we travel to the legs where we enrich the muscles through the capillaries and enter the veins which will bring us back to the heart and continue the cycle again.

Answer:

A

Explanation:

Message travels through the spinal cord

Answer:

D

Explanation:

Sorry if you get this wrong but I am pretty sure the message gets sent to the brain before you take action. So yeah.

⊙﹏⊙

Answer:

B because that is how most are

1. Big Bang:- The theory the universe came forth from a single spot in an enormous explosion.

3. Nebula:- Huge clusters of stars, gas, and dust bound by the force of gravity.

4. Solar System:- A group of objects that orbit a star (Sun)

6. Heliocentric theory:- The idea that the Earth and planets orbit the sun. A sun-centered view.

7. Gravity:- A force of attraction that keeps planets orbiting the sun.

8. Galaxy:- Huge clusters of stars, gas, and dust bound by the force of gravity.

9. Rotation:- The spinning of a planet on its axis, causing day and night.

10. Revolution:- The orbit of a planet around the sun. On Earth, one year.

11. Inner planets:- Mercury, Venus, Earth, Mars. Terrestrial, rocky.

12. Outer planets:- Jupiter, Saturn, Uranus, Neptune. Gas giants.

13. Meteor:- A rock that has entered Earth's atmosphere, leaving a streak of light in the night sky.

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The solar system consists of many planets, moons, stars, asteroids, comets, and meteoroids, which itself is a part of the milky way galaxy. Beyond this are millions of galaxies that constitute the universe.

Big Bang is the theory the universe came forth from a single spot in an enormous explosion. Solar System is a group of objects that orbit a star. The heliocentric theory is the idea that the Earth and planets orbit the sun, a sun-centered view. Gravity is a force of attraction that keeps planets orbiting the sun.
Galaxy is a huge cluster of stars, gas, and dust bound by the force of gravity. Rotation is the spinning of a planet on its axis, causing day and night. Revolution is the orbit of a planet around the sun. On Earth, one year. The inner planets are Mercury, Venus, Earth, and Mars. Terrestrial and rocky. Outer planets are Jupiter, Saturn, Uranus, Neptune, and Gas giants.
Meteor is a rock that has entered Earth's atmosphere, leaving a streak of light in the night sky.

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Answer:

B or C they both look good

Explanation:

Answer:

television and remote controlled stuff

Explanation:

Answer:

radios

television

cellular phones

walkie talkies

computers

radar

sonar

telescopes

satellites

missiles

rockets

The presence of pacific ocean causes weather differences between San Francisco and Kansas city.

The pacific ocean helps in explaining the weather differences between San Francisco and Kansas city because San Francisco is located near the pacific ocean which has great effect on its climate while on the other hand, Kansas city is located far from the pacific ocean which have less or no effect on the climate of the Kansas city.

San Francisco has hot, dry summers and cool, rainy winters due to presence near the pacific ocean whereas the climate of Kansas City has cold winters and hot summers with frequent thunderstorms so we can conclude that the presence of pacific ocean causes weather differences between San Francisco and Kansas city.

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Answer:

A. All organisms would be affected...