Soil Review

Soil is made up of all of the following EXCEPT

• loam

• silt

• clay

• sand

• plastic

There are three types of rocks, igneous, metamorphic and sedimentary. Most rocks spend some time as each type of rock at some point in their cycle.

• True

• False

How are decomposed animals helpful to soil?

• They contain valuable nutrients that become food for all kinds of organisms.

• They provide shade to the soil.

• They contain seeds to grow new life.

• They help speed up the rock cycle.

Hydroponics is a popular way to grow plants without

Why is crop rotation important?

• It gives us a variety of foods to eat.

• It helps farmers make more money.

• It allows farmers to feed their animals.

• It puts nutrients back into the soil.

All of these are reasons to conserve soil EXCEPT __.

• Soil loses nutrients over time.

• Wind erodes soil.

• Soil evaporates in the sun.

• Water erodes soil.

How is the rock cycle different from other cycles in nature?

• It makes a complete circle.

• It happens very quickly.

• It begins with the sun.

• It can go in many different directions.

All plants need soil to live.

• True

• False

What can make changes to landforms. Choose 3.

• Wind

• Radio Waves

• Rain

• Snow

• Light