Soil

Front

What is HUMUS made from?

Back

The remains of decayed plants and animals

Front

Are there minerals in soil?

Back

Yes

Front

What are the three components of soil?

Back

clay, sand, humus

Front

When plants, animals, and other organisms die, they break down and become part of the soil. What is this part of the soil called? Options: sand, silt, clay, humus

Back

humus

Front

Which layer is the bottom of the soil profile?

Back

Bedrock

Front

Why can't many plants grow in sandy soil?

Back

Sandy soil does not hold enough water.

Front

What is soil made of?

Back

Weathered rocks and minerals, dead plants and animals, air and water.

Front

Which layer of soil are these roots growing in?

Back

topsoil

Front

Why is humus important?

Back

It helps plants grow

Front

Which process contributes to soil development?

• Volcanic eruptions that make new land
• Building up of snow in very cold areas
• Migration of animals to warmer climates
• Breaking down of rock by wind, water, and ice

Back

Breaking down of rock by wind, water, and ice