Show:
Our Changing Earth
Landforms
Weathered Rocks
Physical and Chemical Weathering
Soil
100

What is weathering?

the breaking down of rock

100
What is deposition?
earth material carried by moving water eventually stops moving and settles out
100

What does the word "sediment" mean?

a smaller piece of a rock that's been broken down by weathering and erosion

100

When acid rain changes the minerals in a rock, is this an example of physical or chemical weathering?

Chemical

100

How is soil formed?

from weathered rocks and humus

200

What is erosion?

The movement of sediment from broken rock

200
What is erosion?
the movement of pieces of weathered rock by water or wind
200

How do sedimentary rocks form? a. hot rocks that cool b. from bits and pieces of recycled rocks and minerals c. the ocean

b. from bits and pieces of recycled rocks and minerals

200
What is physical weathering?
When rocks break up as a result of physical forces
200

What is humus?

the dead plant and animal material in soil

300

What is deposition?

The settling of sediment in a new place

300
Which landform forms as a result of deposition? a. valley b. arch c. canyon d. delta
d. delta
300

What creates rocks shaped like this?

https://the-earth-story.com/post/185600839473/amazing-wind-these-wind-erosion-features-in


sand and wind erosion. The pattern of the rock formation shows rock has been worn away by the sand and wind

300
What is chemical weathering?
Water or acids that dissolve the minerals in a rock
300

Which type of earth material would a farmer most likely NOT find in his crop field?

sand

400

Name the correct order these processes take place:

Erosion, deposition, weathering

Weathering, erosion, deposition

400

Most landforms take a long time to change. Which answer describes a way landforms change rapidly?

a. erosion

b. deposition

c. earthquakes

d. freezing water

c. earthquakes

400

What causes a rock to look like this?

https://sciencing.com/effects-physical-weathering-7413510.html

The rock has been split by water seeping into cracks and freezing.

400

When water fills cracks in rocks and freezes, it can break rocks apart. This happens because water ________ when it freezes.

expands

400

List AT LEAST three materials that soil is made of:

Possible answers could be: pebbles, sand, water, humus, clay, gravel

500

Give an example of deposition

Answers will vary

500
Water flows fastest from the top of mountains because: a. it has the most water b. it has a steep slope c. it has the longest distance to flow
B. it has a steep slope
500

Why do potholes form in the road in the spring?

In the spring, temperatures usually get below freezing at night but above freezing during the day, causing water to freeze and thaw and freeze over and over, breaking up the road.

500

Physical and chemical weathering are both processes that: 

a. dissolve rocks and form caves 

b. break earth materials into smaller pieces 

c. change earth materials into different materials 

d. use water to move rocks to new locations

b. break earth materials into smaller pieces

500

Why might soil from one place be different from soil in another place?

There are different types of rocks in different places.

The amount of weathering can be different.

Erosion and deposition carry earth materials to different places.

Humus depends on what plants and animals lived there.