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Vocabulary
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Soil
This and That
Resources
100
This means to use resources wisely
What is conserve?
100
This is material that is burned for energy
What is fuel?
100
This is decayed plant and animal materials in the soil
What is humus?
100
This is how long it takes for 1 centimeter of soil to form
What is 1,000 years?
100
This is a fuel that forms from the remains of ancient plants and animals
What is a fossil fuel?
200
This is a material on Earth that is necessary or useful for people
What is a natural resource?
200
This is a resource that cannot be replaced or reused easily
What is a nonrenewable resource?
200
This layer of soil is the lowest layer and it is made of solid rock
What is bedrock?
200
This type of soil has a lot of small grains called sand and holds very little water
What is sandy soil?
200
Plants, animals, water, and air are this type of resources
What is a renewable resource?
300
This is energy from the sun
What is solar energy?
300
This is a resource that can be replaced or used again and again
What is a renewable resource?
300
The soil's ______ is determined by what types of materials are in it.
What is color?
300
This type of soil has grains smaller than sand
What is silty soil?
300
Fossil fuels are this type of resource
What is a nonrenewable resource?
400
This is water that is held in rocks below the ground
What is groundwater?
400
This is what happens when harmful materials get into water, air, or land
What is pollution?
400
This is the middle layer of soil which is lighter in color and has less humus
What is subsoil?
400
This type of soil has the smallest grains and holds a lot of water
What is clay soil?
400
Moving water, wind, and solar energy are all this type of energy source
What is renewable?
500
This is a mixture of minerals, weathered rocks, and decayed plant and animal matter
What is soil?
500
This is the trace or remains of something that lived long ago
What is a fossil?
500
This is the top layer of soil which is dark and has the most humus and minerals
What is topsoil?
500
This type of soil is made from a mixture of sand, salt, and clay and is best for growing crops
What is loam?
500
If it takes 1,000 years for 1 centimeter to form, then how long would it take for 5 centimeters to form?
What is 5,000 years?