Planet Earth 8-10

Question 1

What is carbonaceous film?

Answer 1

Heavy pressure from sediment may leave a film of the outline of the organism on rock.

Question 2

What is original remains?

Answer 2

The actual organism, or parts of it.

Question 3

What are trace fossils?

Answer 3

Evidence of animal activity

Question 4

What is the principle of superposition?

Answer 4

In undisturbed layers of rock, the oldest are on the bottom, and the newest stack on top

Question 5

What is strata?

Answer 5

Sedimentary layers

Question 6

What is relative dating?

Answer 6

To find the order which things occurred, geologists date rocks by examining their position in the strata

Question 7

What is an index fossil?

Answer 7

Used to determine the relative age of a layer of rock

Question 8

What is a half life?

Answer 8

The time it takes half an amount of an element to turn into another

Question 9

What is radiometric dating?

Answer 9

Measuring amounts of elements in rock to calculate age

Question 10

What is radiocarbon dating?

Answer 10

Uses carbon 14 to date fossils, bones, and wood

Question 11

What are fossil fuels made from?

Answer 11

Soft parts of plants and animals transform into solid, liquid, and gas fossil fuels

Question 12

What is bitumen?

Answer 12

Heavy almost solid form petroleum