Soil Review

Soil formation begins with the weathering of_______.

• Humas
• Subsoil
• Litter
• Rock

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 and on farms. It is a mixture of clay, sand, and silt.

• loam
• humus
• soil
• dirt

Are there minerals in soil?

• Yes
• No

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

When plants, animals, and other organisms die, they break down and become part of the soil. What is this part of the soil called?

• sand
• silt
• clay
• humus

Which of the following is the largest particle in soil?

• sand
• silt
• humus
• clay

You dig a small hole in the soil and the next day it rains. The hole fills with water, but does not empty even after several days of dry weather. What is the soil mostly made of?

• clay
• sand
• humus
• silt

Soil is made of

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

How can you tell the difference between two minerals?

• By their streak test and hardness
• By their color only
• By their grain size
• By where they were found