Earth A Q3 2025 FINAL EXAM

Front

What impact do seasonal changes have on Yosemite's flora and fauna?

Back

Seasonal changes bring variations in temperature and precipitation, affecting both flora and fauna.

Front

What do humans and plants depend on for respiration?

Back

Humans depend on oxygen, while plants depend on carbon dioxide.

Front

What percentage of Earth's history is made up of the Precambrian time?

Back

88% of Earth's history is made up of the Precambrian time.

Front

What action could increase the amount of oxygen in the air?

Back

Planting more trees could increase the amount of oxygen in the air.

Front

Define photosynthesis.

Back

Photosynthesis is the process by which green plants use sunlight to synthesize foods with the help of chlorophyll, converting carbon dioxide and water into glucose and oxygen.

Front

What is the greenhouse effect?

Back

The greenhouse effect is the warming of Earth's surface due to the trapping of heat by greenhouse gases in the atmosphere.

Front

Explain the water cycle.

Back

The water cycle is the continuous process by which water evaporates from the Earth's surface, condenses in the atmosphere, and precipitates back to the surface.

Front

What role do decomposers play in an ecosystem?

Back

Decomposers break down dead organic matter, returning nutrients to the soil and supporting plant growth.

Front

What is biodiversity?

Back

Biodiversity refers to the variety of life in a particular habitat or ecosystem, including the diversity of species, genetic variation, and ecosystem diversity.

Front

What is the significance of the carbon cycle?

Back

The carbon cycle is significant because it regulates Earth's climate and supports life by recycling carbon among the atmosphere, oceans, soil, and living organisms.