Semester Exam Review Part I

Front

What is activation energy?

Back

Activation energy is the energy required to break chemical bonds; it is important because it determines the rate of chemical reactions.

Front

What is a keystone species?

Back

A keystone species is a species that has a disproportionately large effect on the structure of an ecosystem.

Front

What is the purpose of a hypothesis in the scientific method?

Back

The purpose of a hypothesis is to make predictions based on observations.

Front

Why is biodiversity essential for ecosystems?

Back

Biodiversity promotes ecosystem resilience, stability, and the ability to recover from disturbances.

Front

What does the water cycle involve?

Back

The water cycle involves precipitation, evaporation, and transpiration.

Front

What is the carbon cycle?

Back

The carbon cycle includes processes like photosynthesis and respiration.

Front

What is the nitrogen cycle?

Back

The nitrogen cycle involves fixation and denitrification.

Front

What is the phosphorus cycle?

Back

The phosphorus cycle involves the weathering of rocks.

Front

What is the significance of activation energy in chemical reactions?

Back

It determines the rate at which reactions occur.

Front

How do keystone species affect ecosystems?

Back

They help maintain the structure and balance of the ecosystem.