Soil Composition Homework Review

What is soil made of?

• dust, worms, bacteria and water

• air, water, organic materials, inorganic materials

• insects, rocks, water, air

• humus, rocks, water, air

What does organic material contain?

• rocks and chemicals

• live animals and plants

• dead and decaying plant and animal material

• rocks and live plants

What do inorganic materials contain?

• sand, clay and other minerals

• live plants

• living animals

• billions of bacteria

What are organic materials?

• living animals and plants in soil

• rocks, water and air in soil

• things in soil that were once alive

• foods that are healthy to eat

Why is organic material important?

• it provides air

• it makes the water cycle work

• it helps to run automobiles

• it keeps soil healthy

Tags

NGSS.MS-LS2-3

What in the difference between organic material and organic matter?

• organic material and organic matter are the same thing

• organic material in alive and organic matter is dead

• organic material is still composing and organic matter is decomposed

• organic material is on top of soil and organic matter is at the bottom of soil

What makes up half of most soils?

• bacteria

• dead insects

• inorganic matter

• organic matter

What does bacteria transform?

• it takes carbon out of the air we breathe

• it changes organic material into chemicals that give soil nutrients

• it changes inorganic material into chemical that give soil nutrients

• it changes water into soil

Tags

NGSS.MS-LS2-3

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