This organ helps you think, learn, and remember.
What is the brain?
The basic unit of life in all living organisms.
What is a cell?
Everything around us is made of this.
What is matter?
This type of structure is designed to span a gap and support loads.
What is a bridge?
This is the star at the center of our solar system.
What is the Sun?
This planet is known for its rings.
What is Saturn?
A community of organisms interacting with each other and their environment.
What is an ecosystem?
This force pulls objects toward Earth.
What is gravity?
This simple machine lifts a flag on a pole.
What is a pulley?
This natural satellite orbits the Earth.
What is the Moon?
This scientist is famous for discovering gravity after watching an apple fall.
Who is Isaac Newton?
This body system transports oxygen and nutrients.
What is the circulatory system?
The process of changing from a liquid to a gas.
What is evaporation?
This simple machine is shaped like a triangle and is used to split things apart.
What is a wedge?
This force keeps planets in orbit around the Sun.
What is gravity?
This is the name for animals that eat only plants.
What are herbivores?
The variety of life in a particular ecosystem.
What is biodiversity?
When heat is added, particles do this.
What is move faster and spread apart?
This is a push or pull exerted on an object.
What is a force?
This layer of gases surrounds Earth and protects life.
What is the atmosphere?
This famous female scientist discovered radioactivity.
Who is Marie Curie?
These cells fight infections in the body.
What are white blood cells?
Energy related to heat and temperature.
What is thermal energy?
This type of force pushes things together
What is a compression?
This process causes day and night on Earth.
What is Earth's rotation?