absolute and relative dating

Question 1

law of superstition

Answer 1

Younger rock layers tend to be on top of older rock layers.

Question 2

law of cross-cutting relationships

Answer 2

Some igneous rocks jet up through older rocks. they must be younger than any layer they pass through.

Question 3

law of original horizontally

Answer 3

All rocks start off horizontal but then might tilt due to some activity.

Question 4

fossils

Answer 4

Some remains or trace of a once living organism that is preserved in rock. Index fossils help us tell the age of the rock by identifying when the fossil was made.

Question 5

absolute dating

Answer 5

determining the exact age of a thing.

Question 6

half lives

Answer 6

The amount of time it takes for half of a radioactive element to decay. By determining the amount of elements decayed and not decayed we can figure its age.

Question 7

why is radiation dangerous?

Answer 7

It causes damage to cells and to your DNA (by ionizing them)

Question 8

short half lives

Answer 8

Are more dangerous right now but danger declines over time.

Question 9

long half lives

Answer 9

Are more dangerous because they are radioactive for a very long time.