Water Cycle Terms
Solar system Facts
Composting Basics
Energy and Forces
Earth and Life Science
100

The process where liquid water turns into a gas.

What is evaporation?

100

How long it takes to orbit the sun

What is 365 days?

100

Tiny organisms like worms and bacteria that help break down compost

What are decomposers?

100
The source of all energy on Earth

What is the sun?

100

The name for the large bodies of salt water that cover most of Earth's surface.

What are oceans?

200

The process where water vapor turns into liquid droplets to form clouds.

What is condensation?

200

The length of a lunar cycle

What is 28 days?

200

The name for the natural process of breaking down food and plant waste into soil.

What is decomposition?

200

A force that pulls objects toward each other, like Earth pulling you down.

What is gravity?

200

The layer of gases that surrounds Earth and helps support life.

What is the atmosphere?

300

Rain, snow, sleet, or hail falling to Earth from clouds.

What is precipitation?

300

The reason Earth experiences day and night.

What is Earth's rotation?

300

A type of material that adds "green" nutrients like nitrogen to compost.

What are food scraps or grass clippings?

300

A push or pull that can cause an object to start moving, stop, or change direction.

What is a force?

300

The movement of nutrients and energy between living things and their environment.

What is an ecosystem?

400

Water that flows across the land into rivers, lakes, and oceans.

What is runoff?

400

The reason the constellations change with the seasons.

What is Earth's orbit around the sun?

400

A type of material that adds "brown" ingredients like carbon to compost.

What are dry leaves or cardboard?

400

The force that acts against gravity to help planes fly.

What is lift?

400

A change that helps a living thing survive in its environment.

What is an adaptation?

500

Water soaking into the ground or being taken in by plants.

What is absorption?

500

How long it will take to be a new moon if we experienced a full moon last night.

What is 14 days?

500

The main reason composting is helpful for the environment.

What is it reduces waste and makes healthy soil?

500

The flow of energy through organisms.

What is a food web?

500

The slow wearing away of Earth's surface by wind, water, or ice.

What is erosion?