Soil
Physical Weathering
Chemical Weathering
100
This is the material that you find in soil with rock material.
What is Humus
100
This is the breaking apart of rocks
What is weathering?
100
This is the breaking apart of rocks and it also changes to rock material.
Chemical weathering
200
Name a type of rock material you might find in soil.
Pebble, Gravel, Sand, Clay or Silt
200
This is when rocks rub together or bang together and break.
Abrasion or Physical Weathering
200
This mineral reacts with acid rain to change material in rocks.
What is calcite?
300
Dead or Decaying Plants or animals.
What is humus?
300
Rocks break apart without changing what they're made of.
Physical weathering
300
What two rocks from our experiment were affected by acid rain?
Marble and Limestone
400
Why might this desert not be a great place to grow plants?
It does not have a great amount of humus
400
Take a look at this rock. What are some possible ways that this rock was weathered? 
Answers will vary.
Water froze in the cracks.
Abrasion
400
How does acid rain affect rocks?
It can react with minerals like calcite or iron to change materials of rocks and break them apart.
500
Pretend you wanted to plant something in a meadow. What are some materials you might find in the soil?
Pebbles, Gravel, Sand, Clay or Silt, Humus
500
What is another way that rocks are physically weathered besides water freezing in cracks or abrasion?
Roots growing and breaking rocks in the ground
500
Take a look at the picture. It was once solid rock. What most likely caused it to change?
Chemicals in water got into the rock and dissolved some of the rock.