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12 Cards in this Set

  • Front
  • Back
What is topsoil made of?
weathered rock and humus.
What is NOT a normal part of soil?
glass
What is formed when freezing water cracks rocks apart?
silt or sand
Why is it important to protect the topsoil in our environment from erosion?
It grows plants and food.
Plants grow better in which type of soil?
topsoil
What is soil erosion?
Topsoil carried away by wind and water.
How does a rotting tree stump help the environment?
It decomposes and forms new soil.
Which layer contains mostly small bits of nonliving material?
topsoil
Soil provides plants with what?
support
Which layer contains most of the nutrients that plants need to live?
topsoil
Which of the following is NOT a way of conserving topsoil?
planting the same crops every year in a field.
How are animals, including humans, dependent upon soil?
Soil provides support and nutrients for plants that animals eat.