Space Systems
Earth’s Systems
Weather & Climate
History of Earth
Human Sustainability
100

This object is at the center of our solar system and provides most of Earth’s energy.

What is the Sun?

100

This sphere includes all of Earth’s water, including oceans, rivers, glaciers, and groundwater.

What is the hydrosphere?

100

This is the short-term condition of the atmosphere, such as temperature, wind, and precipitation.

What is weather?

100

________ is a break in the rock that makes up Earth's crust

fault or fault line

100

This is a resource that can naturally replace itself over a short period of time.


What is a renewable resource?

200

These changing shapes of the Moon are caused by the Moon’s position relative to Earth and the Sun.

What are Moon phases?

200

This process breaks rocks into smaller pieces without moving them away.

What is weathering?

200

This is the long-term average pattern of weather in a region.

What is climate?

200


This law states that in undisturbed rock layers, the oldest layer is usually on the bottom.

What is the law of superposition?

200


This energy source uses moving air to generate electricity.

What is wind energy?

300

This force keeps planets in orbit around the Sun.

What is gravity?

300

This process moves sediment from one location to another by wind, water, ice, or gravity.

What is erosion?

300

This type of front forms when cold air pushes warm air upward quickly, often causing storms.

What is a cold front?

300

This type of dating gives the actual age of a rock or fossil in years.

What is absolute dating?

300

This happens when humans remove too many trees from an area, increasing erosion and habitat loss.

What is deforestation?

400

Earth has seasons mainly because Earth is tilted on this as it revolves around the Sun.

What is its axis?

400

This type of plate boundary can form mountains when two continental plates collide.

What is a convergent boundary?

400

These gases trap heat in Earth’s atmosphere and help control Earth’s temperature.

What are greenhouse gases?

400


This type of rock is most likely to contain fossils.

What is sedimentary rock?

400


This human activity adds carbon dioxide to the atmosphere when coal, oil, or natural gas are burned.


What is fossil fuel combustion?

500

When the Moon moves directly between Earth and the Sun, this event can occur.

What is a solar eclipse?

500

This process recycles old oceanic crust back into the mantle at a convergent plate boundary.

What is subduction?

500

This transfer of heat occurs when warm, less dense air rises and cool, denser air sinks.

What is convection?

500


Scientists use this radioactive process to determine the age of some rocks and ancient materials.


What is radioactive decay?

500

This is a possible engineering solution that reduces flooding by allowing rainwater to soak into the ground instead of running off pavement.

What is permeable pavement?