!!!!!How do radioactive elements help scientists establish how old rocks and fossils are?!!!!

Answers

Answer 1

Answer:

I will give a hypothesis. Just like a tree, when you cut a tree by its trunk, you will the rings. The rings around it represents the tree's age. So when you cut rock, the pores in the rock determine whether it is an old rock or a fossil rock.

Explanation:

The reason is, if it is limestone and it is an old rock, the pores will be slightly big and if the limestone is a fossil rock, then the pores will be bigger due to leaching or denaturing of the minerals in the rock through the ages.

Answer 2

Answer:

Radioactive elements all have a specific half-life, which is the time it takes for half of the radioactive elements in the fossil to disappear. In absolute dating, numbers are given to the ages of different fossils and rocks. To give an exact number or age range to a fossil, scientists use radiometric dating.  This is where the half-lives of radioactive isotopes within the fossil or in the rock surrounding it are analyzed. Radioactive isotopes decay at a steady rate. By measuring the ratio of the radioactive isotope to the stable isotope it decays into, the number of completed half-lives can be estimated. Since you know the rate of decay, you can estimate dates with this ratio.

Explanation:

This is the process used to help scientists establish how old rocks and fossils are


Related Questions

Why is organic fertilizer is better than inorganic fertilizer? Pls pls pls answer I really need it

Answers

Answer:

organic fertilizer can cause less harm to the plant & environment as it isn't toxic (completely natural) as opposing to fertilizers, which is filled with toxic chemicals.

how does water purifier work

Answers

Answer:

idontknow

Explanation:

3. In the context of the article, how are we changed by war? Cite evidence from this text, your own experience, and other literature, art, or history in your answer


please help

Answers

Answer:

It includes written letters and diaries written during war time. It will describe these chapters that is exploration of world by war.

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What are some possible genetic changes over time that can result from sexual selection?

Answers

Answer: Anything from coat color, body structure, etc

Explanation: Sexual selection is when the animals with the best traits survive to reproduce, so this means that anything that benefits the animals would be an outcome of sexual selection.

Why do doctors give fluids when losing blood but not water ?
Help me

Answers

Answer:

In trauma patients, fluid resuscitation helps restore lost blood volume, regain tissue perfusion, and reduce mortality. Water is a different case.

Explanation:

please answer thiis lol?

Answers

Answer:

b to a

Explanation:

since cells in membranes move from high to low concentration (diffusion). b has more molecules, so it will go into a.

Membranous sacs containing substances that were produced in the cell, such as neurotransmitters or hormones, are called:

Answers

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Membranous sacs containing substances that were produced in the cell, such as neurotransmitters or hormones, are called VESICLES.

Vesicles are membrane sacks that store different chemical messengers such as neurotransmitters and hormones.

For example, neurotransmitter vesicles are specific synaptic vesicles that store neurotransmitters in order to release them at the synaptic cleft.

The release of neurotransmitters or hormones by membrane vesicles leads to the activation of the target cell.

In conclusion, membranous sacs containing substances that were produced in the cell, such as neurotransmitters or hormones, are called VESICLES.

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The latitude of a biome measures its height above sea level.

True
False

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The answer should be true in this scenario

if jalen, who is from indonesia, undergoes counseling for a family problem, his therapist should be aware of his cultural background and the important role his family and community play in his life. this awareness is known as

Answers

The knowledge associated with cultural background and the role of family and community is known as CULTURAL COMPETENCE. It is the ability to interact with people from different cultures.

Cultural competence can be defined as the ability to understand and then interact with people from different cultures and/or different belief systems.

This feature (cultural competence) leads to effective and proper communication with people from different countries and cultures.

Cultural competence is composed of

Awareness of the own cultural backgroundKnowledge of different culturesAttitude towards people from different culturesCross-cultural skills

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TEST PLS HELPP
In general, how small are viruses?
a) a few millimeters to a few centimeters
b) as big as bacteria
c) 50 times smaller than bacteria
d) about the size of an amoeba

Answers

Answer

Is C :)

I took the test

Answer: C

Explanation:

I took the quiz

1.Which of these statements is classified as inference?

Answers

what are the statements?

an inference is a conclusion reached on the basis of evidence and reasoning
examples:
if you see someone eating a new food and he or she makes a face, then you infer he does not like it
if someone slams a door, you can infer that she is upset about something.

Which medical term is used to describe diseases that have an unknown cause?

Answers

Answer:

b. Idiopathic

Explanation: is correct

what process ultimately determines what specialized job a cell will have within an organism?

Answers

The answer is cell differentiation

the hypothalamus controls the posterior pituitary by way of __________.

Answers

The answer is neuroendocrine reflexes

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4 Spheres Observation (Bio, Geo, Atmo, Hydro) : What did you see that represents each? How did they interact with each other? and pls be specific in ur answer, and pls no links!

Answers

Answer:

The spheres interact to effect Earth’s systems and processes, and they are constantly changing each other.

For example, ocean currents (hydrosphere) affect air temperature (atmosphere): The Gulf Stream is a powerful water current in the Atlantic Ocean. It’s warm water moderates the temperatures on the east coast of the USA.

Another example of how the spheres affect each other is through erosion. Erosion happens in the desert when wind (atmosphere) shapes the sand in the geosphere. Water (hydrosphere) can also shape land, such as in the formation of the Grand Canyon.

Humans have a huge impact on all spheres. Negative impacts, such as burning fossil fuels, pollute the atmosphere. Piling up our waste in landfills affects the geosphere. Pumping waste into the oceans harms the hydrosphere. And overfishing and habitat destruction can reduce the diversity of living things in the biosphere.

However, people everywhere are working to change things. Recycling efforts are increasing all over the world, and companies are finding new ways to reduce fossil fuels. In the US alone, people are recycling six times more than a generation ago.

Power refers to the rate at which _______ can be produced.

Answers

Answer:

c. ATP

Explanation: adenosine triphosphate

Option 3 is correct.

Among the given options,

■ Power refers to the rate at which ATP (Adenosine Triphosphate) can be produced.

=》 The ATP molecules produced in the mitochondria is known as the energy currency of the cell & provides energy to other cell organelles which help support on their proper functioning.

_____

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condition necessary for osmosis to takes place

Answers

What two conditions are necessary for osmosis to take place

The conditions required for osmosis are:

Two solutions having different solute concentration.

A semi-permeable membrane. When two solutions having different concentration of solutes is separated by a semi-permeable membrane, the solvent moves from the region of high concentration of solvent

100 points!! And brainliest!

Answers

QUESTION (1)WHY IS KELP INTOLERANT OF WARMER SEAWATER TEMPERATURS?

ANSWER:A

QUESTION (2)WHICH OF THESE TERMS DESCRIBE KELP?

ANSWER:D

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Answer: a+c

ExplanationExplanation:

Name a plant organ, identify the tissues that make up this organ.

Answers

Hello!!

What tissues make up a leaf?

Leaves include two different types of photosynthetic parenchyma cells (palisade and spongy). Like all plant organs, they also contain vascular tissue (not shown). Monocots tend to have parallel veins of vascular tissue in leaves, while dicots tend to have branched or net-like veins of vascular tissue in the leaves.

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There are ________ enlargements of the spinal cord.

Answers

Answer:

There are two enlargements

Explanation:

how are respiration and photosynthesis related to one another

Answers

The end product of Photosynthesis is glucose that is used in cellular respiration to make ATP. The glucose is then turned back into carbon dioxide, which is used in photosynthesis. While water is broken down to form oxygen during photosynthesis, in cellular respiration oxygen is combined with hydrogen to form water.
The last answer is correct, if you were wondering

What are the major divisions and subdivisions of the human nervous system?

Answers

Answer:

The nervous system as a whole is divided into two subdivisions: the central nervous system (CNS) and the peripheral nervous system (PNS)

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The nervous system as a whole is divided into two subdivisions: 

Central nervous system (CNS)

Peripheral nervous system (PNS).

True or False: Tetanus can make breathing difficult.

Answers

Answer:

True   is correct on edg

Explanation:

What does the narrator notice outside the house before he goes in?

a fissure or crack in the wall
a dead bird in a tree
curtains twitching
an alligator in the moat

Answers

A fissure or crack in the wall.. would be the correct answer.

why are fleas lice wingless?​

Answers

Fleas, like lice, are small wingless insects. Unlike lice, which can only crawl, fleas can jump from one host (such as a pet) to another.

Why do cells become specialized in the human body?

Answers

Answer:

They can become any type of cell in the body.

Explanation:

They can transport molecules, metabolize nutrients, and reproduce within this one cell. ... Cell differentiation is the process by which cells become specialized in order to perform different functions. Specialized Cells in the Human Body. Multicellular organisms begin as just one single cell—a fertilized egg.

Which of the following is NOT a structure of the nervous system?

Answers

Answer:

b. The heart

Explanation:is correct

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The relative humidity is 100%, and the temperature is hot. In a few sentences, explain how the weather would change if the temperature drops and becomes cool.

Answers

Answer:

The relative humidity will lower.

Explanation: Cool air cannot hold as much water than warmer air can. So once the temperature in the air drops, so does the relative humidity.

Hope this helps :D

what does a target cell require to respond to an extracellular signal molecule?

Answers

A specific protein called a receptor

Lichens are not single organisms, but algae and fungi that function together. The algae use photosynthesis to make food for both organisms. The fungi produce digestive chemicals and absorb nutrients for both organisms.

How does the biological activity of lichens cause weathering in rocks?
Answer options with 4 options
A.
Lichens cause friction as they grow, which weathers the rocks.
B.
Lichens produce chemicals, which dissolve and weather the rocks.
C.
Lichens take in water, which freezes in cracks and weathers the rocks.
D.
Lichens absorb heat during photosynthesis, which weathers the rocks.

Answers

Answer:

The correct answer is B

Lichens produce chemicals which dissolve and weather rocks

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