Soils

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

Which of the following is the largest particle in soil?

• sand
• silt
• humus
• clay

The texture of soil depends mainly on

• the types of plants that grow in the soil.
• the size of the particles in the soil.
• the color of the soil.
• the number of worms in the soil.

Soil is made of

• Weathered rock
• decomposed plants and animals
• air and water
• all of the above

What are the three soil particles that we use to classify soils?

• sand, dirt, and soil
• clay, sand, and silt
• silt, loam, and sandy loam
• clay, salt, and pebbles

Organisms, like bacteria and fungi, that recycle nutrients back to the soil

• Eutrification
• legumes
• Nitrogen Fixing
• decomposers

Which type of soil drains the slowest?

• silt
• clay
• sand
• loam

What type of soil has all other soils in it?

• Sand

• Clay

• Loam

• Silt

Which soil is best to grow plants in?

• silt

• loam

• sand

• clay