The Geosphere
The Hydrosphere
The Atmosphere
The Biosphere
Space Science
100

This is the temperature of the inside Earth.

very hot

100

Most of Earth's water is found here.

Oceans

100
The atmosphere is made of this.

Gases

100

Early Earth cound NOT support life because of these two reasons.

Harsh climate; little oxygen

100

Everything in our solar system revolves around this.

The Sun

200

The way the continents move

Very slowly
200

This has almost no dissolved salt.

Fresh water

200

What produces solar wind?

The Sun

200

The Cambrian explosion brought this.

Biodiversity

200

The amount of galaxies there are.

Billions

300

A sudden shaking of the ground and ocean floor caused by the shifting of rocks and blocks.

Earthquake
300

Rain, snow, sleet, hail are all examples of this.

Precipitation

300

The areas that typically recieve more snow: coastal or mountainous.

Mountainous

300

The reason cyanobacteria were some of Earth's most important early life forms.

They could do photosynthesis.

300

Outer planets are made of this.

Ice and methane

400

What magma turns into when it reaches Earth's surface through volcanic eruption.

Lava

400

Temperature of water coral reefs are found in

warm

400
The layer of the atmosphere that contains almost all of Earths air and water vapor.

The troposphere

400

These evolved into eukaryotes

Prokaryotes

400

The theory for how the universe began.

The Big Bang Theory

500

The remains of plants or animals from long ago.

Fossil

500

This is caused by extreme precipitation or an overflow of water on Earth's surface.

Flood

500

The process by which something changes directly from a solid to a gas without passing through the liquid state.

Sublimation

500

When modern day humans appeared on Earth.

200,000 years ago

500

How much distance light can travel in one Earth year. 

Light year