if you measure the age of a fossil using 14c dating and determined its age to be about 17000 years old, how much of the rock should be made of 14N
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Answer:
Geologists do not use carbon-based radiometric dating to determine the age of rocks. Carbon dating only works for objects that are younger than about 50,000 years, and most rocks of interest are older than that. Carbon dating is used by archeologists to date trees, plants, and animal remains; as well as human artifacts made from wood and leather; because these items are generally younger than 50,000 years. Carbon is found in different forms in the environment – mainly in the stable form of carbon-12 and the unstable form of carbon-14. Over time, carbon-14 decays radioactively and turns into nitrogen. A living organism takes in both carbon-12 and carbon-14 from the environment in the same relative proportion that they existed naturally. Once the organism dies, it stops replenishing its carbon supply, and the total carbon-14 content in the organism slowly disappears. Scientists can determine how long ago an organism died by measuring how much carbon-14 is left relative to the carbon-12.
The percentage of 14C is close to 12%
Carbon-14 is a radioactive isotope chemical element characterized by containing 6 protons and 8 neutrons. Its main function is the dating of organic specimens because it is present in all organic materials.
This is because once an organism dies carbon-14 slowly decreases over year as the lifespam of carbon dioxide is between 5000 and 30000 years. The way it decreases is determined by a mathematical function, but to make it easier there are graphs like the one below that show the process.
According to the graph showing the amount of carbon in an organic material when a fossil is 17,000 years old, the percentage of Carbon - 14 is about 12%.
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Related Questions
in the late 1600s, english astronomer edmond halley presented a model of earth’s structure. helmet originally claimed that earth was
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What is the difference between the arctic and equator environment?
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Answer:
What is the difference between the arctic and equator environment? In the Arctic environment there is snow so the environment is cold while there is dirt or sand in the equator environment, so it is hot.
Explanation:
can some one help plssssss
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Answer:
Chemical messages- nervous system
Gases- respiratory system
regulation of the body- endocrine system
Explanation:
gases-respiratory system
regulation of the body- endocrine system
From the moth’s point of view, is the ability to be seen an advantage (known as an advantageous trait) or disadvantage (known as a disadvantageous trait)? Explain your reasoning.
Answers
Answer:
Disadvantageeous trait
Explanation
Since the moth is not high up in the food chain, it would want to hide from others by blending in with its surroundings rather than be easily seen as that would just make it easier for them to become easy prey for anything higher up in the food chain nearby.
Answer:
This is payback for you answering wrong on my question..
Explanation:
The FitnessGram Pacer Test is a multistage aerobic capacity test that progressively gets more difficult as it continues. The 20 meter pacer test will begin in 30 seconds. Line up at the start. The running speed starts slowly, but gets faster each minute after you hear this signal. A single lap should be completed each time you hear this sound. Remember to run in a straight line, and run as long as possible.
Why doesn't DNA make mistakes?
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DNA does make mistakes; they are called mutations. This usually happens when there is an error in replication.
What color are chthamaluis?
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Answer:
there like brown grayish color
Answer: white
Explanation:
Plants experience _____ gravitropism when their roots move towards the center of the earth.
A.positive
B. negative
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Answer: Positive
Explanation:
Roots growing downward in the soil toward the center of the Earth are manifestations of positive gravitropism.
what is chemotropism ?
Answers
Answer:
its the growth of organisms navigated by chemical stimulus from outside of the organism.
Explanation:
example would be the growth of pollen tube down to the ovule in the ovary through the stigma and style during fertilization in order to respond to the presence of sugars in the style.
lists levels of organization in the universe from simplest to most complex
Answers
Answer:
organelle, cells, tissues, organs, organ systems, organisms, populations, communities, ecosystem, and biosphere.
Explanation:
What is crossing-over?
A. the mismatching of chromosomes during Metaphase I
B. the passing of chromatides through the membrane
C. the exchange of segments of DNA during synapses in Prophase I
D. The exchange of segments of DNA during synapses in Metaphase I
Answers
Which process describes how many pure-bred dogs have been produced?
A. Cloning
B. Crossbreeding
C. Selective breeding
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Answer:
C.
Explanation:
While I'm against forcing animal to breed, I know the studies sorta.
What is a responding variable
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Answer:
A responding variable is a variable that the researcher predicts will change if the manipulated variable changes. A responding variable is also called a dependent variabl
Question 1 of 10
In which sealed container would the organisms be able to continuously cycle
O2 and CO2 gases?
A. A terrarium with a plant and a snail
B. An aquarium with fish and plastic plants
C. A terrarium with tadpoles and a pool of water
D. An aquarium with rocks and snails
Answers
Answer:Option A
Explanation: The snail breaths in the O2 which will then exhale CO2, therefore the plant will take that and process the CO2 back into O2.
The organisms would be able to continuously cycle O2 and CO2 gases in a sealed container of a terrarium with a plant and a snail. Thus, the correct option is A.
How do O2 and CO2 cycle in the environment?The carbon dioxide is utilized by the photosynthetic plants in order to synthesize their own food through the process of photosynthesis. They form oxygen as a product which is then utilized by other living organisms for respiration and exhaling carbon dioxide in the surroundings.
A terrarium with a plant and a snail follows the same principle of exchanging oxygen and carbon exchange within the sealed container environment which is described above.
An aquarium with fish and plastic plants does not exchange carbon dioxide and oxygen because plastic plants are not able to perform photosynthesis.
Therefore, the organisms would be able to continuously cycle O2 and CO2 gases in a sealed container of a terrarium with a plant and a snail. Thus, the correct option is A.
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For the following DNA strands, what would the complementary strand be?
DNA: ATG CGG ATC GCT TTA ATT CGG ATA TGT
DNA:
DNA: GGC ATG CGA ATT AGG CCT CAA TGC TTT
DNA:
DNA: TTC ATG GGG GCA CCA CTG ATA GGC AAC
DNA:
Answers
Answer:
DNA: ATG CGG ATC GCT TTA ATT CGG ATA TGT
DNA: TAC GCC TAG CGA AAT TAA GCC TAT ACA
DNA: GGC ATG CGA ATT AGG CCT CAA TGC TTT
DNA: CCG TAC GCT TAA TCC GGA GTT ACG AAA
DNA: TTC ATG GGG GCA CCA CTG ATA GGC AAC
DNA: AAG TAC CCC CGT GGT GAC TAT CCG TTG
Explanation:
A always pairs with T and G always pairs with C (vice versa). Hope this helps :D !
Which level includes organisms that get their energy solely from an abiotic factor?
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Answer:
Not enough information, but I would have to go with producers.
Explanation:
Producers use abiotic factors (mainly the sun and water).
What percentage of offspring will have pink flowers
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Answer:
50%
Explanation:
The pink flower donates the r allele and produces pink flowers in 50% of the offspring.
we need a box image to predict how many offspring of pink flowers there will be :/
Cells are the basic unit of _______ and______
Answers
Answer:
Structure and Function
Explanation:
Answer: Cells are basic units of structure and function in living things. This means that cells form the parts or an organism and carry out all of the an organism's processes, or functions.
PLEASE HELP ASAP. Answer question in photo.
Answers
Answer:
Meiosis is important because it ensures that all organisms produced via sexual reproduction contain the correct number of chromosomes. Meiosis also produces genetic variation by way of the process of recombination.
Explanation:
It would be A
PLS HELP
write a paragraph with 10+ sentences about the peridodic table. also write another paragraph with 10+ sentences about density
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Answer:
Periodic table:
The periodic table is a chart that arranges the chemical elements in a useful, logical manner. Elements are listed in order of increasing atomic number, lined up so elements that exhibit similar properties are arranged in the same row or column as others.
Although Dmitri Mendeleev is most often cited as the inventor of the modern periodic table, his table was just the first to gain scientific credibility. It wasn't the first table that organized the elements according to periodic properties.
There are about 94 elements on the periodic table that occur in nature. All of the other elements are strictly human-made. Some sources state more elements occur naturally because heavy elements may transition between elements as they undergo radioactive decay.
Technetium was the first element to be made artificially. It is the lightest element that has only radioactive isotopes (none are stable).
The International Union of Pure Applied Chemistry, IUPAC, revises the periodic table as new data becomes available. At the time of this writing, the most recent version of the periodic table was approved in December 2018.
The rows of the periodic table are called periods. An element's period number is the highest unexcited energy level for an electron of that element.
Columns of elements help to distinguish groups in the periodic table. Elements within a group share several common properties and often have the same outer electron arrangement.
Most of the elements on the periodic table are metals. The alkali metals, alkaline earth, basic metals, transition metals, lanthanides, and actinides all are groups of metals.
The present periodic table has room for 118 elements. Elements aren't discovered or created in order of atomic number. Scientists are working on creating and verifying elements 119 and 120, which will change the appearance of the table, though they were working on element 120 before element 119. Most likely, element 119 will be positioned directly below francium and element 120 directly below radium. Chemists may create much heavier elements that may be more stable because of the special properties of certain combinations of proton and neutron numbers.
Although you might expect atoms of an element to get larger as their atomic number increases, this does not always occur because the size of an atom is determined by the diameter of its electron shell. In fact, element atoms usually decrease in size as you move from left to right across a row.
The main difference between the modern periodic table and Mendeleev's periodic table is that Mendeleev's table arranged the elements in order of increasing atomic weight, while the modern table orders the elements by increasing atomic number. For the most part, the order of the elements is the same between both tables, though there are exceptions.
Destiny:
That is, density (p) is equal to the total mass (M) divided by total volume (v). This formula can be used to determine the density of any substance. Common units for the measurement of density include grams (g), milliliters (ml), or grams per cubic centimeter. For instance, if there are 50 grams of a given substance within a cubic centimeter, that unit’s density is 50g/mm3.
Density can vary according to temperature and pressure. Applying pressure to an object decreases volume, which then increases density. Increasing the temperature of an object almost always decreases its density by increasing its volume.
By heating the bottom of a volume, especially a fluid volume such as a liquid or gas, convection causes the substance to rise, thus increasing the volume. The temperature variation is typically minor in solids and most liquids, but much greater in gases. The abbreviations to know are:
NTP: Normal Temperature and Pressure. Equal to 20 degrees C (68 F) and 1 atmosphere of pressure. Our examples below are all at NTP.
STP: Standard Temperature and Pressure. Equal to 0 degrees C (32 F) and 1 atmosphere of pressure.
These standardized pressures and temperatures make it possible to confirm equal densities are being used regardless of the application.
A tsunami hits the coast of a heavily populated island.
Which effect might occur?
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B. Loss of homes
I NEEDZ HELP I WILL GIVE U BRAINLIEST
Answers
Answer:
A. To take in oxygen and remove carbon dioxide
Explanation:
If the heart moves blood, the only logical answer would be A because blood is either oxygenated or deoxygenated.
DNA is always coiled up tightly in chromosomes.
True or false?
Answers
So true
Most domesticated animals have been bred for specific, favorable traits. Dairy cows are bred for maximum milk production while dogs are bred for size and color, among other characteristics. The process of humans controlling the breeding of organisms is known as -
Answers
Answer:
I think I it is selective breeding also known as artificial selection
In Griffith's transformation experiments, the S and R strains of bacteria were _____ and _____ in nature, respectively.
Select one:
a. non-virulent, virulent
b. virulent, non-virulent
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Which of the following does NOT describe a fluid?
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Answer:
list them
Explanation:
Answer:
plz list the answers :)
Explanation:
Why should we not take antibiotics without the prescription of a doctor
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Answer:
Experts say taking antibiotics without a doctor's supervision can cause an infection to become more powerful. It can also contribute to the growing number of “superbugs” that are resistant to medications
Explanation:
what is eukaryotic multicellular consume and eats its own food?
A.Protista
B.Fungi
Answers
A semi-permeable cell membrane is most like a A college professor in a lecture. B small child in a high-chair. C bouncer at a club. D soldier in battle.
Answers
Answer: C
bouncer at a club.
Explanation: i did on flocabulary
1. In cattle (R) is incompletely dominant over white (W) hides. Roan is the name of the color that results from the incomplete dominance. What are the
possible results if a white male is crossed with a roan female? Make sure to give genotypic AND phenotypic ratios in your answer.
Answers
When white male (WW) is crossed with a roan female (RW), 2 roan (RW, RW): 2 white (WW, WW) offspring are produced.
What is genotype?"The internal makeup of genes is called genotype."The alternative form of gene is called allele.The allele that is expressed in the generation is called dominant allele and the allele whose expression is masked and is only expressed if both of its copy is present is called recessive allele.What is phenotype?"The expressed characters are called phenotype."What is incomplete dominance?"In this condition both alleles of a gene are expressed, which will result in an intermediate or different phenotype."Here, it is given that red (R) is incompletely dominant over white (W) hides, which means that when RR is crossed with WW it produces RW (roan color). So, when RW (roan color) is crossed with WW (white color) it produces RW, RW, WW and WW.Hence, 2 roan (RW, RW) : 2 white (WW, WW) offspring are produced.
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1. What are El Niño and La Niña characterized by??
Answers
BrotherEye Online
Answer:
Greeatings here is the soulution to your question
Explanation:
El Niño (the warm phase) and La Niña (the cool phase) lead to significant differences from the average ocean temperatures, winds, surface pressure, and rainfall across parts of the tropical Pacific. Neutral indicates that conditions are near their long-term average.
Answer:
el nino means the boy
el nina means the girl
Explanation: