Final Exam Review

Front

What tool is commonly used to measure dissolved oxygen in water?

Back

DO meter

Front

Energy flow in ecosystems is described by which law?

Back

The first law of thermodynamics

Front

What human activity has a major impact on the nitrogen cycle?

Back

Industrial agriculture and fertilizer use

Front

The movement of carbon between the atmosphere and oceans is an example of an interaction between which spheres?

Back

Hydrosphere and atmosphere

Front

In the phosphorus cycle, what is the main reservoir?

Back

Rocks and minerals

Front

What is the law of conservation of mass?

Back

Matter cannot be created or destroyed in an isolated system.

Front

Define the hydrosphere.

Back

The hydrosphere includes all water on Earth, including oceans, rivers, lakes, and groundwater.

Front

What is the biosphere?

Back

The biosphere is the global sum of all ecosystems, where life exists.

Front

Explain the carbon cycle.

Back

The carbon cycle is the process by which carbon is exchanged among the biosphere, geosphere, hydrosphere, and atmosphere.

Front

What is the role of nitrogen-fixing bacteria in the nitrogen cycle?

Back

They convert atmospheric nitrogen into ammonia, making it available for plants.