8th Grade Earth Science Mod. E Unit 1

Question 1

Which of the following is the source of humus found in soil?

Accepted Answer

plants and animals

Question 2

Which is not one of Earth's spheres?

Accepted Answer

Mantle

Question 3

How will exposed granite effect the soil that will eventually form in that area?

Accepted Answer

It will contain many of the same minerals as granite.

Question 4

What type of sediment would be dropped first as wind slows down?

Accepted Answer

the heaviest

Question 5

Which condition is most likely to trigger a mudslide?

Accepted Answer

rain

Question 6

Which are the primary factors that affect soil formation?

Accepted Answer

Climate, parent rock, topography, living things and time

Question 7

Which is an example of abrasion of a rock?

Accepted Answer

a shape change due to exposure to wind

Question 8

Which is an example of abrasion of a rock?

Accepted Answer

A shape change due to exposure to wind

Question 9

In which of the following soil layers is humus mostly found?

Accepted Answer

A horizon

Question 10

Which soil horizon typically contains the least organic matter?

Accepted Answer

C horizon

Question 11

What is the nitrogen content of Earth's atmosphere?

Accepted Answer

78%

Question 12

What is the term for the place where land and a body of water meet?

Accepted Answer

shoreline

Question 13

What happens to a rock when it is weathered?

Accepted Answer

It is broken into smaller pieces

Question 14

As a river enters the ocean, which action causes the deposition of sand at a delta?

Accepted Answer

river water slowing as it enter the ocean

Question 15

What can cause granite to break down into soil over time?

Accepted Answer

Rain and wind

Question 16

Which describes how microorganisms influence the chemical characterstics of soil?

Accepted Answer

Add organic material to the soil by breaking down remains

Question 17

The diagram shows how sediment is deposited by a fast moving river? What does the diagram show?

Accepted Answer

alluvial fan

Question 18

Loess is a very valuable resource. What characteristics of loess makes it so valuable?

Accepted Answer

Loess is rich in minerals.

Question 19

What is the composition of Earth's atmosphere?

Accepted Answer

78% nitrogen, 21% oxygen, and 1% other gases

Question 20

What often happens to rocks that undergo chemical weathering?

Accepted Answer

They crumble more easily.

Question 21

What part of the Earth system includes the water in wetland?

Accepted Answer

the hydrosphere

Question 22

What force is mainly responsible for the erosion & deposition that happens in landslides?

Accepted Answer

Gravity

Question 23

Which are the main causes of crack growth in rocks over time?

Accepted Answer

plant roots and ice wedging

Question 24

What can cause granite to beak down into soil over time?

Accepted Answer

rain and wind

Question 25

What force is mainly responsible for the erosion and deposition of Earth's surface?

Accepted Answer

gravity

Question 26

What is order of the layers of the geosphere when starting from Earth's center and moving out?

Accepted Answer

core, mantle, crust

Question 27

Which landform listed is mainly formed because of erosion by groundwater?

Accepted Answer

an underground cavern

Question 28

Leaves release acids into the soil as they decay. How can that affect rocks in the soil?

Accepted Answer

Could increase the amount of chemical weathering of rock

Question 29

Each layer of the geosphere has a different composition. What element makes up most the crust?

Accepted Answer

oxygen

Question 30

Which term BEST describes the movement of soil from place to place due to rainfall?

Accepted Answer

erosion

8th Grade Earth Science Mod. E Unit 1

Questions 30

8th Grade Earth Science Mod. E Unit 1

Questions 30