Soil Layers
What is it made of?
Soil Conservation
How is it made?
Natural Resources
100
What are the 3 layers of soil?
top soil, subsoil, and bedrock
100
What are the 4 components of soil?
silt, clay, rock, and sand
100
What is conservation?
prevention of wasteful use of a resource
100
What is it called when the weather breaks down rocks?
Weathering
100
What are natural resources? (Do NOT give an example)
materials that occur in nature
200
In which layer can we find humus?
topsoil
200
List the 4 components (sand, rock, silt, and clay) from smallest size to largest size.
Clay, Silt, Sand, Rock
200
Why should we conserve soil?
Soil conservation helps to maintain good soil for us to use to grow plants and trees that we need.
200
What are two forms of weather that break down rocks?
ice, wind, water
200
Is plastic a natural resource?
NO
300
Which layer takes the longest time to form and is not good for growing plants?
bedrock
300
Water flows easily through me. If you rub me, I feel rough and gritty. What am I?
Sand
300
Are farming and planting trees BOTH forms of soil conservation?
Yes!
300
What is it called when weather breaks down rock and carries it away?
Erosion
300
Are grass, apples, and shoes ALL natural resources?
NO, only grass and apples
400
Which layer is the best for growing plants?
topsoil
400
I am stick when wet and I don't allow water to pass easily through me. What am I?
clay
400
Are crop rotation and cutting down forests BOTH forms of soil conservation?
NO! Only crop rotation is a form of soil conservation
400
What form of weathering has affected this rock?
Ice weathering
400
Are animals, wind, and trees ALL natural resources?
YES!
500
What is humus made out of?
organic material like dead plants and animals
500
List the 4 components (sand, rock, silt, and clay) in order of which retains the most water to which retains the least water.
Clay, silt, sand, rock
500
What are 2 important things that soil does for us? (check your slides)
filters the air and water, stops flooding, stops climate change, provides us with food
500
What form of weathering has affected this rock?
Wind weathering
500
What is an example of a natural resource AND an example of something that is NOT a natural resource?
Good job!