The Soil Family includes different sized particles called ______________.

What is a method for growing plants in water without soil?

In the early 1700s, a farmer named Charles Townsend experimented with _________.

Which of the following is not a type of rock?

What method would best fit in the diagram to keep soil rich and healthy?

What makes the rock cycle different from other cycles in nature?

How are decomposed animals helpful to soil?

Do plants need soil to grow?

__________________ rocks form under intense heat and pressure.

Layered rocks that are weathered by wind and water are called _____________.

_____________ is the process of rocks breaking down and becoming other rocks.

Rocks that are formed when red-hot magma cools down.

To break down organic matter to become part of the soil.

The practice of growing plants without soil, but by adding the plants' nutrients directly to the water.

The practice of planting different things each year, in order to maintain the nutrients in the soil of a field.

To use wisely, and not be wasteful.

George Washington Carver was a professor of agriculture. He is famous for his studies of _____?