Ecology 3

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

• loam
• humus
• mud
• dirt

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

Tags

NGSS.MS-LS2-3

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

Tags

NGSS.MS-ESS2-4

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 pH of the soil .

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-4

What is not included in the definition of litter (for soil)

• Sticks
• Leaves
• Trash
• Animals

The parent material of soil is...

• comes from limestone

• comes from bedrock

• comes from litter

• comes from fertilizer

Ice wedging and root action are examples of...

• physical weathering

• chemical weathering

• leaching

• carbonation

Rusting is caused by...

• carbonation
• oxidation
• hydrolysis
• nitric acid

Tags

NGSS.MS-PS1-5