Which organ is responsible for pumping blood throughout the body?

What type of blood cells fight infections?

Which part of the plant transports water from roots to leaves?

What process do plants use to make food?

Which organelle produces energy in a cell?

Which system controls body activities using hormones?

What is the basic structural and functional unit of life?

Which type of reproduction involves only one parent?

Which biomolecule carries genetic information?

Which part of the brain controls balance and coordination?

What causes day and night on Earth?

Which layer of Earth is liquid and located under the mantle?

What is the force that pulls objects toward the center of Earth?

Which planet is known as the Blue Planet?

Which gas is most abundant in Earth's atmosphere?

What is the tilt of Earth's axis responsible for?

Which celestial body revolves around the Earth?

Which instrument measures air pressure?

What is the path Earth follows around the Sun called?

Which galaxy is our solar system part of?

What type of energy is stored in food?

What is the boiling point of water in Celsius?

Which simple machine is a flat, sloped surface?

What force opposes motion between two surfaces?

Which energy is associated with motion?

What is the SI unit of mass?

Which material allows electricity to flow easily?

Which type of energy increases as an object heats up?

What force keeps planets in orbit around the Sun?

Which tool is used to measure weight of an object?