Third Grade Science Review

Sand, tiny rocks, twigs, and leaves make...

• plants

• landforms

• soil

• gardens

When living things decompose they

• store fat for the winter

• grow healthy and strong

• have babies

• break down into the soil

Sun-Tree-Squirrel-Hawk The Hawk gets its energy from

• sun

• tree

• squirrel

• other hawks

How do plants contribute to the formation of soil?

• support animal life in the soil

• use soil to grow

• shade it from the sun

• die, decompose, and become part of the soil

Earthquakes change the earth's surface by....

• violently shift the surface of the earth

• throw ash into the air

• cause clouds to form and rain to fall

• force lava through holes in the ground

How would cutting down trees in a forest affect the animals that live there?

• the animals will move underground

• they will eat different kinds of food to survive

• all of the animals will perish in a short period of time

• animals that can't find what they need will move

What type of energy is produced by a bell?

• light

• sound

• heat

• mechanical

How is thermal energy used at school?

• writing with a pencil

• looking in a mirror

• cooking food for lunch

• turning on the lights

All of the following changes could help an animal thrive except

• removal of animals that eat the same food

• fewer predators that eat the animal

• less rain in the spring and summer

• more of the kind of plants the animal eats

What type of energy is produced when the handle of a pencil sharpener turns?

• mechanical

• magnetic

• electrical

• light