The Human Body
Matter and its Properties
The Solar System
Ecosystems and the Environment
Energy and Motion
200

This organ pumps blood throughout the body.

What is the heart

200

This is the state of matter that has a definite shape and volume

What is a solid

200

This planet is known as the "Red Planet."

What is Mars

200

This term describes all living and nonliving things in a particular area

What is an ecosystem

200

This is the energy of an object due to its motion

What is kinetic energy

400

This is the largest organ in the human body

What is skin

400

This is the term for a change in matter from a solid to a liquid

What is melting

400

This large gas giant is famous for its rings.

What is Saturn

400

This is the process by which plants make their own food using sunlight, carbon dioxide, and water

What is photosynthesis

400

This type of energy is stored in an object due to its position or condition, like a stretched spring

What is potential energy

600

These cells help fight infections

What are white blood cells
600

This process occurs when a liquid turns into a gas

What is evaporation

600

This is the closest planet to the Sun

What is Mercury

600

These organisms break down dead plants and animals, returning nutrients to the soil

What are decomposers

600

This is the force that opposes the motion of objects sliding past each other.

What is friction

800

This organ is responsible for breaking down food and absorbing nutrients

What is the small intestine

800

This term describes the amount of space an object takes up

What is volume

800

This dwarf planet is located in the Kuiper Belt and was once considered the ninth planet

What is Pluto

800

This is the term for a community of living organisms interacting with their environment in a specific area

What is a habitat

800

This law states that an object will remain at rest or in uniform motion unless acted upon by an external force

What is Newton's First Law of Motion (the law of inertia)

1000

This part of the brain controls thinking, memory, and voluntary movement

What is the cerebrum

1000

This is the term for the ability of a substance to dissolve in a liquid

What is solubility

1000

This planet is known as the "Earth's twin" because of its similar size and composition

What is Venus

1000

This type of biome is characterized by extremely low temperatures and ice-covered land.

What is a tundra

1000

This type of energy is transferred between objects and can take the form of heat, light, or sound.

What is thermal energy

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