The Earth's Resources - Minerals, Rocks and Soil

Rocks are made from types of ____________ that are substances found in nature that are not plants or animals.
If you rub a rock on something, the minerals in the rock leave marks behind called a:
1. scratch
2. texture
3. hardness
4. streak
A rock that has been changed by squeezing and heating is a _______________ rock.
1. igneous
2. sedimentary
3. metamorphic
Igneous rocks form:
1. when melted rock cools and hardens.
2. when sand, mus and pebbles at the bottom of rivers, lakes and oceans pile up.
3. when the rocks are subjected to squeezing and heating.
Once a rock is formed, it can never re-form.
1. True
2. False
Check all the things that can break rocks into pieces:
1. wind
2. water
3. sunlight
4. plants
5. animals
A material made up of one or more minerals is called a _______________.
Rocks that form when melted rock from volcanoes hardens are called:
1. sedimentary
2. metamorphic
3. igneous
Check the things you might find in soil:
1. minerals
2. living plants
3. water
4. air
5. bedrock
You would expect to find a sedimentary rock __________________.
1. near a volcano
2. in a pool of still water
3. in a forest
4. at the bottom of a stream
A material in the soil that was once living or formed by a living thing is called _______________.
Humus adds _____________ to the soil.
Below all layers of soil is:
What does NOT appear in subsoil?
1. minerals
2. water
3. humus
A rock that has been changed by pressure and heat is called a ____________ rock.
1. sedimentary
2. metamorphic
3. igneous
4. metallic
If you were a farmer, you would like your soil to contain which of the following? (Check all that apply.)
1. humus
2. bedrocks
3. water
4. some sand
5. some clay
Farmers rotate their crops to:
1. put nutients, like nitrogen, back into the soil.
2. put water back into the soil.
3. make their job more interesting.
Glass is made primarily from:
1. water
2. sand
3. iron
4. salt
Windy, dry weather can make soil
1. thicker
2. thinner
3. neither
Plants need what things from soil to make food? (Check all that apply)
1. minerals
2. air
3. water
4. nutrients