Plant grass or other plants so that the roots hold the soil in place
100
What are the three main classes of rocks?
Igneous
Sedimentary
Metamorphic
100
What are three characteristics of minerals?
color
luster
hardness
cleavage
200
What type of climate makes better soil? (Wet or dry)
Wet
200
What are the layers of the Soil Horizon? (in order)
O
A
B
C
Bedrock
200
What were the two main causes of the Dust Bowl?
Drought and Erosion
200
How are metamorphic rocks created?
Heat and pressure
200
What is luster?
How shiny a mineral is
300
What are two ways that different soil types are determined?
Texture and permeability
300
What is permeability?
How much water gets into something
300
What are two ways we can help prevent (stop) soil erosion?
Put plants on the side of slopes
Crop rotation
No till farming
300
How are sedimentary rocks formed?
Weathering and erosion (compaction and cementation)
300
Look at your Mineral Identification Chart.
Which mineral is black and dull?
graphite
400
What layer of the soil horizon is thin and has organic material?
O
400
How do we know if soil is healthy?
We test it (P, K, N, pH)
400
What is the difference between mechanical and chemical weathering?
Mechanical weathering: when rocks are broken down into pieces by physical forces
Chemical weathering: When rocks are broken down by chemical reactions (changes the chemical composition)
400
How are igneous rocks formed?
Melting and cooling (magma/lava hardens into igneous rocks)
400
Look at your Mineral Identification Chart.
Which mineral is gray and metallic?
Galena
500
Which layer of the soil horizon is dark and rich in nutrients? (where the roots grow)
A
500
What are three ways that we can improve soil's health?
Add fertilizer
Practice no till farming
Crop rotation
500
What is one example of mechanical weathering and one example of chemical weathering?
Mechanical: animals changing the shape, water getting into a rock and breaking it apart, wind, water
Chemical: acid rain
500
What is compaction and cementation?
When sediments (small pieces of rock) are pushed and stuck together
500
Look at your Mineral Identification Chart.
Which mineral is glassy and green?