Matter & Its Interactions
Energy & Motion
Earth's Systems
Ecosystems & Interactions
Living Systems
100

This is the basic unit of all matter.

What is an atom?

100

This is the energy an object has due to its motion.

What is kinetic energy?

100

This sphere includes all the land on Earth—mountains, valleys, and soil.

What is the geosphere?

100

Plants are this type of organism because they make their own food.

What is a producer?

100

This process allows plants to make their own food using sunlight.

What is photosynthesis?

200

The three main states of matter are solid, liquid, and this.

 What is gas?

200

This type of energy comes from the sun and supports almost all life on Earth.

What is solar energy?

200

This natural process wears down rocks over time.

 What is weathering?

200

Animals that eat plants or other animals are called this.

What is the consumer?

200

The tiny pores on the underside of leaves where gas exchange occurs are called this.

 What are stomata?

300

When water changes from a liquid to a gas, this process occurs.

 What is evaporation?

300

This force slows down moving objects when they rub together.

What is friction?

300

Rain, snow, and sleet are forms of this.

 What is precipitation?

300

An animal that breaks down dead organisms is known as this.

What is a decomposer?

300

This plant part anchors the plant and absorbs water and nutrients.

What are the roots?

400

This type of change does not form a new substance, just changes its appearance.

What is a physical change?

400

When a ball is sitting at the top of a hill, it has this kind of energy.

What is potential energy?

400

The continuous movement of water around Earth is called this.

What is the water cycle?

400

A series of steps showing how energy moves through an ecosystem is called this.

What is a food chain?

400

These carry water from the roots to the leaves.

What are stems?

500

When vinegar and baking soda mix, they create a chemical reaction and release this gas.

What is carbon dioxide?

500

Energy that travels in waves and can be seen with the eyes is called this.

What is light energy?

500

The thin layer of gases that surrounds Earth is called this.

What is the atmosphere?

500

When all food chains in an ecosystem are connected, it forms this.

What is a food web?

500

This is the reproductive part of a flowering plant.

What is the flower?

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