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Weathering
Erosion
Think Deep
Sequence
Experiments
100

Name 2 types of physical weathering

Answers may vary

100
Weathering breaks it, erosion takes it. What does takes it mean?
Takes it means erosion moves sediments, soil, sand rocks, etc to a new place
100

What is Erosion?

Erosion is the movement of sediments after weathering. It happens by wind, water, ice.

100
What comes first, weathering or erosion?
Weathering
100

Which experiment modeled abrasion?

Shaking the conglomerate and granite in the tumble jars

200

After weathering occurs, what is left over from the rocks that have been broken down?

sediment

200

Which of the following is an erosion processes? A.Seeds fall into cracks of rocks and as the roots grow the crack expands. B.Waves hit the coast line wearing down rocks and washing sand away. C. Rocks rub together and wear down. Small pieces, called sediment, break off.

B.Waves hit the coast line wearing down rocks and washing sand away.

200
What is weathering?
Weathering is the process of breaking down and weakening sediments that will be moved by erosion.
200
What comes first erosion or deposition?
erosion
200

Which experiment modeled chemical erosion?

Vinegar and limestone/granite

300

Explain the freeze-thaw method of physical weathering.

When water goes into cracks in rocks, it freezes and the cracks expand. The ice melts as the temperature warms up. When the temperature drops, the water freezes again, expanding the crack even more.

300
Erosion is the movement of sand/soil/rocks. When this "drops" in a new spot it is called______.
deposition
300

Name one way to slow down erosion.

Answers may vary

300
What comes last deposition or weathering?
deposition
300
When we put water in the soda can and froze it, what happened and WHY?

The water froze to form ice and the ice expanded, coming out from the can.  This happened because when water freezes, it expands.

400

When rocks rub together and become worn down or break into smaller pieces this is called______.

abrasion

400
At the beach I noticed new beach grass was planted along the sand dunes. How does this help slow down erosion?
The roots hold the soil/sand to the ground.
400
Can erosion be stopped?
no
400
List in order: deposition, weathering, erosion
weathering, erosion, depostion
400

Describe the changes to the soil when water is "rained" on top of the stream table experiment?

The water eroded the soil and carried it downward.  Smaller sediment settled at the base of the stream table.

500

Describe chemical weathering.

Chemical weathering slowly breaks down rocks and minerals. It is caused by acid rain water reacting with the mineral grains in rocks, to form new minerals.

500
Describe how flowing water causes erosion
1. Flowing water like a river wears down the rocks along side it. 2. Flowing water moves the sand/soil/rocks at the bottom to a new location.
500
How do erosion and weathering work together?
Weathering breaks down rocks and sediments and then erosion moves them.
500

Finish the sentence: _______breaks it,  _________ takes it, ______ drops it.

weathering, takes it, deposition

500

Put the following pieces of sediment in order of how they settled in the soil sample test tubes: clay, gravel, humus, sand.

From top to bottom: humus, clay, sand, gravel (bigger sediment on bottom, smaller/lighter on top)