Soil

Soil is made of

• weathered rocks

• dead plants and animals

• air and water

• all of the above

What does weathering mean?

• To form or create new
• To build up
• To break down
• To completely destroy

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

• weathering

• decomposition

• condensation

• composting

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

• decomposition

• weathering

Which of the following processes will most likely contribute to the development of soil?

• Weathering of rock by wind

• Weathering of rock by water and ice

• Weathering of rock by roots

• All of the above

Weathering is......

• rocks, grass, and mud.

• the breakdown of rocks into smaller pieces

• the breakdown of wind, rain, and friction

• the weather outside

The four main ingredients of soil are....

• wind, water, ice, and humus

• water, air, rocks, and humus

• worms, ice, rocks, and air

• water, air, rocks, and worms

Which of the following does not describe an organism decomposing?

• Breaking apart into smaller pieces

• Changing colors from green to brown

• Growing bigger

• Rotten and smelly

Which of these items can decompose?

• Paper plate

• Rock

• Fruit

• Plastic bottle

Which of the lists contains only items that can decompose?

• Bee, flower, rock

• Grass, worm, tomato

• Flower, rock, plastic cap

• Tomato, paper, flower