Geologic Time Fusion Unit2E

Question 1

What is the meaning of the word Pangaea?

Accepted Answer

All Land

Question 2

The fossil record shows that life on Earth has changed overtime. Older organisms are

Accepted Answer

simpler organisms

Question 3

If you see layers in a rock formation, but are told that the lowest layers are not the oldest

Accepted Answer

The layersof rock had shifted from their original position.

Question 4

A mineral sample has1/4 of its original amount of Potassium40. How many half lives have passed?

Accepted Answer

2

Question 5

Principle states geologic processes that change Earth today also changed Earth in the past?

Accepted Answer

uniformitarianism

Question 6

Geologists use radioactive dating to

Accepted Answer

determine the absolute ages of rocks.

Question 7

This is an example of a ________.

Accepted Answer

mold

Question 8

Bertha found a shark fossil. What is the best way to determine its age?

Accepted Answer

determine the age of the layer of sediment around the fossil

Question 9

Which geologic era is the longest?

Accepted Answer

Precambrium

Question 10

Which layer or event is the oldest?

Accepted Answer

C

Question 11

If you notice that rock formation have horizontal layers, what can you infer?

Accepted Answer

The lower layers are older than the upper layers.

Question 12

Over thousands of years, what will happen to the parent isotope in a rock?

Accepted Answer

The number of parent isotopes will decrease

Question 13

Are you more likely to find a body fossil or a trace fossil?

Accepted Answer

trace

Question 14

Which letter represents the youngest event/layer?

Accepted Answer

E

Question 15

The time it takes for half of the radioactive atoms in a sample of an element to decay is

Accepted Answer

half-life

Question 16

The geologic time scale is divided by what?

Accepted Answer

events

Question 17

Scientists find a fossil of a fish on top of a mountain. Explain what evidence it provides.

Accepted Answer

It shows that the mountain may have once been under water

Question 18

This is an example of a _________________.

Accepted Answer

preserved organism

Question 19

What has the study of fossils allowed scientists to do?

Accepted Answer

describe past environments and the history of life

Question 20

This is an example of a ________________.

Accepted Answer

trace fossil

Question 21

According to meteorites, how old is the Earth?

Accepted Answer

4.6 billion years old

Question 22

This is an example of __________________.

Accepted Answer

cast

Question 23

What will happen to this U-238 over time?

Accepted Answer

U 238 will decrease and lead 206 will increase.

Question 24

The relative age of a rock is

Accepted Answer

its age compared with the ages of other rocks.

Question 25

A type of organism that no longer exists on Earth is said to be

Accepted Answer

extint

Question 26

Scientist believe that all of the land masses were together in one continent called _____ .

Accepted Answer

Pangaea

Question 27

What are fossils?

Accepted Answer

preserved remains or traces of organisms that livedin past

Geologic Time Fusion Unit2E

Questions 27

Geologic Time Fusion Unit2E

Questions 27