Oxygen Cycle
Carbon Cycle
Nitrogen Cycle
100

What process releases oxygen as a result of sunlight.

Photosynthesis.

100

How does the sun help power the carbon cycle?

The sun provides the energy to convert carbon dioxide into sugars via photosynthesis.

100

Name a bacterium that convert nitrogen gas into ammonia.

Rhizobia, or nitrifying bacteria.

200

Name the primary organisms that create oxygen through photosynthesis.

Plants and algae.

200

Name a reservoir where carbon is stored.

The atmosphere, soil, ocean, or rocks.

200

Describe the process of nitrogen fixation.

The conversion of atmospheric nitrogen into ammonia by bacteria.
300

Explain how oxygen supports aerobic respiration.

Oxygen is used in cellular respiration to produce energy, which releases carbon dioxide in the process.

300

What are the primary sources of carbon present in the atmosphere?

Carbon dioxide and methane.

300

Explain the role of nitrogen in plant growth.

It's essential for chlorophyll and protein synthesis.

400

Describe the role of the ozone layer in the oxygen cycle.

The ozone layer absorbs UV radiation and thus protects life on Earth.
400

Explain the role of decomposition in the carbon cycle.

Breaks down organic material, which releases carbon dioxide.

400

What is denitrification?

Conversion of nitrates into nitrogen gasses, reducing the fertility of the soil.

500

What is the impact of deforestation on the oxygen cycle.

Removing trees reduces the amount of photosynthesis taking place, leading to lower oxygen levels.
500

Describe the impact of burning fossil fuels on the carbon cycle.

Increases atmospheric carbon dioxide, which contributes to global warming
500

Discuss the environmental impact of the Haber-Bosch process.

Increased nitrogen fertilizers lead to water becoming too saturated with nutrients, which disrupts natural cycles.