Week 2 - Soil

What kind of soil is this?

• Silt

• Sand

• Dirt

• Beach

Which of the following is NOT one of the layers of soil?

• topsoil
• undersoil
• subsoil
• bedrock

Which of the following is NOT one of the three types of soil?

• clay
• sand
• silt
• mud

_______ is the type of soil used most often with plants. It is a mixture of clay, sand, and silt.

• loam
• humus
• mud
• dirt

Humus is.....

• the dead parts of plants and animals in soil.
• A food we eat with pretzels.
• The tiny particles inside of soil
• The roots that come off of a plant and live in soil.

Ellen grabs a topsoil sample in her hand. She rolls it into a ball. The soil feels gritty and the ball falls apart. What part of the topsoil most likely made the topsoil feel gritty?

• clay
• sand
• silt
• humus

Many plants cannot grow in clay soil. Why is this true?

• Clay soil does not have many nutrients.
• Roots cannot easily push through clay soil.
• Water doesn't drain well through clay.
• All of these choices.

Many plants cannot grow in sandy soil. Why is this true?

• Sandy soil does not hold enough water.
• Oxygen cannot pass through sandy soil.
• Roots cannot easily push through clay soil.
• Sandy soil has too many nutrients.

What are some things that you can add to a compost pile?

• leaves, apple core, and tin foil
• grass clippings, banana peel, and newspaper
• egg shells, plastic spoon, and ziploc bags
• metal fork, rubber spatula, and shoelaces

Soil is made of

• weathered rocks and minerals
• dead plants and animals
• air and water
• all of the above