SCI atomi8c and anoimals

Question 1

when megafuana lived?

Answer 1

(2.6 million to 11,700 years ago).

Question 2

define half-life and what thye do?

Answer 2

Half-life is the amount of time it takes for half of the atoms in a radioactive substance to decay into a different substance.

Question 3

What is fluride dating

Answer 3

by measuring the amount of fluoride they have absorbed from the surrounding soil. Over time, bones buried in the ground absorb fluoride from groundwater. The longer the bones are buried, the more fluoride they accumulate.

Question 4

how does carbon on dating work and the trusted range

Answer 4

Absorption: While alive, organisms absorb carbon-14 from the air.

Decay after death: When the organism dies, it stops absorbing carbon-14, and the carbon-14 already in its body starts to break down at a known rate.

Measuring the age: By checking how much carbon-14 is left, scientists can estimate how long ago the organism died.

Carbon dating is most reliable for dating materials up to 50,000 years old and from 100 yrs

Question 5

how do you use stratigrphy dating

Answer 5

Stratigraphy dating is a relative dating method based on the study of rock layers (strata) and their sequence

Question 6

half life of carbon 14

Answer 6

The half-life of carbon-14 is approximately 5,730 years