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stiv31 [10]
3 years ago
11

How are radioactive isotopes used to date rocks? ...?

Biology
1 answer:
Stolb23 [73]3 years ago
8 0
Some isotopes, however, decay slowly, and several of these are used as geologic clocks. Dating rocks by these radioactive timekeepers is simple in theory, but the laboratory procedures are complex. <span>All methods rely on the fact that certain elements (particularly uranium and potassium) contain a number of different isotopes whose half-life is exactly known and therefore the relative concentrations of these isotopes within a rock or mineral can measure the age.</span>
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please answer I am BEGGING!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
labwork [276]

D. Omnivore, predator, and heterotroph.

It eats plants and animals.

It hunts.

It doesn't make its own food.

3 0
3 years ago
Why do some flowers have so many pollen grains and ovules?
defon

Answer:

A flower has more pollen grains than it does ovules so that the pollen has a better chance of getting to the ovules so they can make seeds so more plants will grow.

Explanation:

I think what you were trying to ask was Why does a flower have more pollen grains than it does ovules?

3 0
2 years ago
Read 2 more answers
Salt concentration would be an example of what type of factor in an ecosystem? A. food production B. abiotic C. biotic
stira [4]
Hello,

Here is your answer:

The proper answer to this question is option C "<span>biotic".

Here is how:

Salt is consider a biotic factor because of it concentration which makes it a factor of the ecosystem.

Your answer is C.

If you need anymore help feel free to ask me!

Hope this helps!</span>
7 0
3 years ago
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Degger [83]

Answer:

2-4 months for carrots and about 120 days for corn

Explanation:

8 0
3 years ago
Define what diffusion is
tatyana61 [14]

Answer:

is the spread of something more widely

Explanation:

4 0
3 years ago
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