Test Review: Earth's Layers to Soils

Soil formation begins with the weathering of_______.

• Humas
• Subsoil
• Litter
• Rock

Decayed organic material in soil is called______.

• Litter
• Silt
• Humus
• Clay

The movement of rocks and weathered materials is called_________.

• Chemistry
• Physical
• Weathering
• Erosion

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

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

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

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

Tags

CCSS.RI.7.1

CCSS.RI.7.8

CCSS.RI.8.1

CCSS.RI.8.8

CCSS.RL.7.1

Water gets into the cracks of rock and freezes, causing the rock to break.  What is this an example of?

• erosion
• weathering

Soil is made of

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