2024 Environmental Science 1st Semester Review

Front

What is an independent variable in an experiment?

Back

The independent variable is the one being changed or manipulated by the scientist in an experiment.

Front

Why is the water cycle important for living organisms?

Back

The water cycle is necessary for survival as it provides water, which is essential for all living organisms.

Front

What percentage of the atmosphere is composed of nitrogen gas?

Back

78% of the atmosphere is composed of nitrogen gas.

Front

What do we call consumers that eat both plants and animals?

Back

Consumers that eat both plants and animals are known as omnivores.

Front

What percentage of Earth’s water is freshwater?

Back

Only 3% of Earth’s water is freshwater.

Front

Define a dependent variable in an experiment.

Back

The dependent variable is the variable that is measured or observed in an experiment, which changes in response to the independent variable.

Front

What is the role of a control group in an experiment?

Back

The control group serves as a baseline to compare the effects of the independent variable, ensuring that the results are due to the variable being tested.

Front

Explain the significance of biodiversity in an ecosystem.

Back

Biodiversity is crucial for ecosystem stability, resilience, and the provision of ecosystem services.

Front

What is the difference between herbivores and carnivores?

Back

Herbivores are animals that primarily eat plants, while carnivores are animals that primarily eat other animals.

Front

What is an ecosystem?

Back

An ecosystem is a community of living organisms interacting with their physical environment.