Human Body
Animals
Astronomy
Geology
Miscellaneous
100

This is the largest organ in the human body.

What is the skin?

100

This is the fastest land animal.

What is a cheetah?

100

This is Earth's closet star.

What is the Sun?

100

This is the layer of gases surrounding Earth.

What is our atmosphere?

100

This is the process by which plants make food.

What is photosynthesis?

200

This is the gas that humans breathe in.

What is oxygen?

200

This is the slowest-moving land animal.

What is the sloth?

200

This is the largest planet in our solar system.

What is Jupiter?

200

This is the Earth's outermost (or top) layer.

What is the crust?

200

This is the study of fossils.

What is paleontology?

300

This is the gas that humans breathe out.

What is carbon dioxide?

300

This bird is known for its ability to mimic human speech.

What is a parrot?

300

This is the closest planet to the Sun.

What is Mercury?

300

This is the hardest natural substance on Earth?

What is a diamond?

300

This is the study of Earth's atmosphere.

What is meteorology?

400

This is the longest bone in the human body.

What is the femur?

400

This animal has the longest lifespan.

What is the giant tortoise?

400

This is the hottest planet in our solar system.

What is Venus?

400

This is the meaning of "geo."

What is earth (ground/land)?

400

This is the study of the Earth's oceans and marine life.

What is oceanography?

500

This is where you will find the smallest bones in the human body.

What is the ear?

500

This animal has the best eyesight.

What is the eagle?

500

This is the name of our Moon.

What is Luna?

500

This type of rock is formed by the cooling and solidification of magma or lava.  

What is igneous rock?

500

This is the process by which rocks break down into smaller pieces.

What is weathering?