Chem
Earth Science
Astronomy
Physics
Bio
100

This chemical element has the symbol H and is the lightest element in the universe.

What is Hydrogen?

100

Melted rock is called magma underground, but it gets called this once it erupts.

What is lava?

100

This closest star to Earth gives us warmth and light.

What is the Sun?

100

This invisible force pulls objects down toward the ground.

What is gravity?

100

This is the smallest basic unit of all living things.

What is a cell?

200

Water is made of hydrogen and this life-giving element.

Water is made of hydrogen and this life-giving element.

200

This instrument or scale measures the strength of an earthquake.

What is the Richter scale?

200

Known as the Red Planet, this is the fourth planet from the Sun.

What is Mars?

200

A push or a pull on an object is known by this simple word.

What is a force?

200

This green pigment helps plants capture sunlight.

What is chlorophyll?

300

Pure water has this neutral number on the pH scale.

Pure water has this neutral number on the pH scale.

300

The three main rock types are sedimentary, metamorphic, and this fire-formed rock.

What is igneous?

300

This is the name of the galaxy that contains our solar system.

What is the Milky Way?

300

This type of energy is stored in an object at rest.

What is potential energy?

300

This vital organ pumps blood through your body.

What is the heart?

400

Common table salt is made of sodium and this reactive gas.

What is Chlorine?

400

This water cycle step turns liquid water into gas or vapor.

What is evaporation?

400

This largest planet in our solar system is a gas giant with a giant red spot.

What is Jupiter?

400

This famous scientist (Isaac Newton) wrote the three laws of motion.

Who is Isaac Newton?

400

This molecule carries genetic instructions and looks like a twisted ladder.

What is DNA?

500

This state of matter has a fixed volume but takes the shape of its container.

What is a liquid?

500

This thick blanket of gases surrounds and protects Earth.

What is the O zone layer 

500

These rocky space objects orbit the Sun mostly between Mars and Jupiter.

What are asteroids?

500

Sound travels slower than this other fast-moving wave of energy.

What is light?

500

This process is how plants use sunlight to make their own food.

What is photosynthesis?

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