Space Out
Weather & Climate
The Water World
Ecosystems
Extreme Earth
100

This giant red planet is nicknamed "The Red Planet" due to iron rusting on its surface.

A: What is Mars?

100

This frozen precipitation falls from the sky in winter when atmospheric temperatures drop below freezing.

A: What is snow?

100

This process happens when liquid water heats up and turns into an invisible gas called water vapor.

A: What is evaporation?

100

Animals that only eat plants, like deer and rabbits, are given this scientific diet name.

A: What are herbivores?

100

This is the shaking of the Earth's surface caused by a sudden release of energy along a fault line.

A: What is an earthquake?

200

This is the closest star to the Earth, providing us with all of our heat and light.

A: What is the Sun?

200

The weight of the air pressing down on Earth is called this; low amounts usually bring rainy storms.

A: What is air pressure (or atmospheric pressure)?

200

We see this step of the water cycle every time clouds form in the sky or fog appears on a bathroom mirror.

A: What is condensation?

200

In a food web, mushrooms and bacteria play this vital role by breaking down dead matter.

A: What are decomposers?

200

This hot, liquid rock is called magma when it is underground, but changes to this name the second it erupts out of a volcano.

A: What is lava?

300

This invisible force keeps the moon orbiting Earth and prevents you from floating away during class.

A: What is gravity?

300

When a warm air mass crashes into a cold air mass, meteorologists call the collision line by this term.

A: What is a front?

300

The absolute vast majority of Earth’s total water supply—about 97%—is trapped in this specific form.

A: What is saltwater (or oceans)?

300

Unlike animals, plants are called "producers" because they create their own food using this process.

A: What is photosynthesis?

300

This is the deepest known place in the world's oceans, plunging nearly 36,000 feet down in the Pacific.

A: What is the Mariana Trench?

400

It takes the Earth exactly 365.25 days to complete one of these geometric trips around the sun.

A: What is a revolution (or orbit)?

400

This powerful, swirling funnel cloud is most famously common in a central U.S. region named "Alley".

A: What is a tornado?

400

This term describes water soaking down into the soil, acting like Earth’s giant natural coffee filter.

A: What is infiltration (or percolation)?

400

If two different species live closely together and both benefit (like a bee and a flower), it is this type of relationship.

A: What is mutualism?

400

This giant, frozen river of ice moves incredibly slowly down a mountain, carving out massive valleys over thousands of years.

A: What is a glacier?

500

This spectacular, colorful light display in the night sky near the North Pole is caused by solar winds hitting Earth's atmosphere.

A: What is the Northern Lights (or Aurora Borealis)?

500

This is the calm, surprisingly clear center point of a massive spinning hurricane.

A: What is the eye?

500

Ice caps and glaciers hold the vast majority of Earth's usable supply of this specific type of water.

A: What is freshwater?

500

This pyramid-shaped diagram shows how energy decreases as it moves up from plants to top predators.

A: What is an energy pyramid?

500

This ring of volcanoes and intense earthquake activity traces the edges of the Pacific Ocean.

A: What is the Ring of Fire?