Fossils/Geologic Time Test Study

Question 0

Explain how marine fossils have been found at the top of mountains

Answer 0

They were found at the top of mountains due to one of Steno’s Laws called the law of Super positioning

Question 1

Define Amber

Answer 1

Fossilized Tree Sap

Question 2

Compare and Contrast relative and Absolute age

Answer 2

Relative: It’s different because it’s an estimated age, it’s the same because it has to do with the age of something such as fossils

Absolute: It’s the actual age of something such as fossils, it’s the same because it’s the age of something such as fossils

Question 3

State the Law of Super position

Answer 3

It stated how fossils were uplifted from the sea floor into the mountains

Question 4

Define Trace Fossils

Answer 4

Evidence of the activity of an organism

Question 5

What are 2 things that make a good index fossil

Answer 5

Fossils that are distinctive, widespread, and lived briefly and Their presence in a rock layer

Question 6

Define 1/2 life

Answer 6

The amount of time required for half of the atoms of a radioactive substance to decay to the daughter product.

Question 7

What is Radiocarbon Dating

Answer 7

Something that is used to find the age of once-living materials between 100-50,000 years old

Question 8

What era do we currently live in

Answer 8

The Cenozoic Era

Question 9

List 3 reasons why early earth was so intensely hot

Answer 9

1. Gravitational Contraction
2. Radioactive Decay
3. Bombardment

Question 10

Why did early earth struggle to keep an atmosphere

Answer 10

It struggled because solar winds blew off atmospheric gases it collected.

Question 11

When did Pangea break up? What have the continents been up to since?

Answer 11

180 million years ago, They are still drifting apart

Question 12

Describe the Mass Extinction that occurred at the end of the Paleozoic Era.

Answer 12

During the mass extinction there was marine transgressions ( Rising in Sea Level) that wiped out the animals and organisms

Question 13

What is the approximate age of our earth

Answer 13

4.5 Billion years old

Question 14

What did volcanic out gassing do for the earth’s early atmosphere

Answer 14

It was a source of water vapor, carbon dioxide, small amounts of nitrogen and other gasses

Question 15

When did the largest mass extinction take place? At the end of what era?

Answer 15

66 million years ago, at the end of the Mesozoic Era

Question 16

How long ago did dinosaurs become extinct

Answer 16

65 million years ago