District Written Exam

Front

What is the primary source of energy that drives Earth's climate system?

Back

Solar energy is the primary source of energy that drives Earth's climate system.

Front

What does the second law of thermodynamics state?

Back

The second law of thermodynamics states that in an isolated system, the total entropy can never decrease over time.

Front

How can you demonstrate the second law of thermodynamics using two liquids of different temperatures?

Back

By mixing the liquids and measuring the final temperature, you can observe the tendency for heat to flow from the hotter liquid to the cooler one.

Front

What is energy flow in the context of Earth's climate?

Back

Energy flow refers to the transfer of energy through the Earth's systems, including the input from the sun and the output as heat.

Front

How does CO2 cycle through the food chain?

Back

CO2 is absorbed by plants during photosynthesis, which are then consumed by herbivores, and subsequently by carnivores.

Front

What is global warming?

Back

Global warming refers to the long-term increase in Earth's average surface temperature due to human activities, primarily the emission of greenhouse gases.

Front

What role do fossil fuels play in global warming?

Back

Burning fossil fuels releases CO2 into the atmosphere faster than it can be removed, contributing to global warming.

Front

What is photosynthesis?

Back

Photosynthesis is the process by which green plants and some other organisms use sunlight to synthesize foods with the help of chlorophyll.

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

What are renewable energy sources?

Back

Renewable energy sources are energy sources that are replenished naturally, such as solar, wind, and hydroelectric power.