Biosphere
Hydrosphere
Geosphere
Atmosphere
Interactions
100

It's the process where plants convert sunlight, water, and carbon dioxide into energy.

What is photosynthesis?
100

It's the process where water vapor rises from oceans and lakes into the air.

What is evaporation?

100

This process is when wind, water, or ice wears away rock and soil over time.

What is erosion?

100

They are the 2 most abundant gases in the atmosphere.

What are nitrogen and oxygen?

100

Deforestation removes trees, which reduces the absorption of carbon dioxide from the air. Which two spheres does this interaction primarily involve?

Biosphere + Atmosphere

200

It's the type of water found in rivers, lakes, and ponds.

What is freshwater?

200

~70% of all freshwater is stored in these.

What are glaciers?

200

These are the 3 most important nutrients in soil.

What are nitrogen, potassium and phosphorus?

200

It's responsible for keeping out harmful UV radiation.

What is the ozone layer?

200

Photosynthesis, where plants take in carbon dioxide and release oxygen, is a key process linking which two spheres?

Biosphere + Atmosphere

300

It's where bacteria and fungi break down dead organisms and return nutrients to the soil.

What is decomposition?

300

It's water that soaks into the ground and is stored underground.

What is ground water?

300

Movements of these create mountains and earthquakes

What are tectonic plates?

300

Although only a small percentage of the atmosphere, this gas is essential for photosynthesis.

What is CO2?

300

Oceans absorb and store the majority of the excess heat trapped by greenhouse gases. What major sphere interaction does it show?

Hydrosphere + Atmosphere

400

It's the flow of energy through an ecosystem, showing who eats whom.

What is a food web/food chain?

400

It's the process called when water vapor turns back into liquid water droplets, forming clouds.

What is condensation?

400

This type of rock forms when sediment layers are compressed and cemented together over time.

What is sedimentary rock?

400

This gas, when it increases in the atmosphere, is most associated with human-caused climate change.

What is CO2?

400

Earthquakes can trigger tsunamis that devastate coastal ecosystems. Which three spheres are involved in this process?

Biosphere, hydrosphere, geosphere

500

It's a species that plays a critical role in maintaining the structure of an ecosystem, such that its removal would cause major changes.

What is a keystone species?

500

It's an area of land where all water drains into a common river, lake, or ocean.

What is a watershed?

500

It's when one tectonic plate slides beneath a heavier plate, sinking below and recycling old crust.

What is subduction?

500

It's layer of the atmosphere is closest to Earth's surface and where most weather occurs.

What is the Troposphere?

500

Coral reefs building calcium carbonate structures that become part of the ocean floor over time show interaction between which spheres?

Biosphere and geosphere

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