Biogeochemical Cycles Notes

Open Ended

How do biogeochemical cycles contribute to the continuous movement of elements between living things and the environment?

Multiple Choice

Which of the following is NOT a main carbon reservoir listed in the carbon cycle basics?

• Atmosphere (as CO2)

• Oceans

• Living organisms

• Fossil fuels

Open Ended

Explain how carbon moves through ecosystems, including at least three processes involved.

Multiple Select

Select all the processes that contribute to the movement of carbon in the carbon cycle diagram.

• Photosynthesis

• Respiration

• Weathering

• Nitrogen fixation

Open Ended

Describe the role of bacteria in the nitrogen cycle and why it is important for plants and animals.

Multiple Choice

Which step in the nitrogen cycle involves converting ammonia to nitrates?

• Nitrogen fixation

• Nitrification

• Assimilation

• Denitrification

Multiple Choice

Which of the following is NOT a reason why natural cycles are important for life on Earth?

• They support all life on Earth

• They help plants grow

• They increase pollution

• They maintain atmospheric balance

Open Ended

Explain how human activities disrupt natural cycles and describe at least two environmental consequences that result from these disruptions.

Open Ended

What questions do you still have about biogeochemical cycles or their role in ecosystems?

Multiple Choice

Why are biogeochemical cycles important for maintaining ecosystem balance?

• They recycle elements essential for life

• They increase pollution

• They stop the movement of elements

• They only focus on water