Question

climate change & energy video questions

1. what is the definition of climate?
2. name three greenhouse effect gases.
3. what percentage of earths water is drinkable?
4. explain how the greenhouse effect works using the greenhouse analogy.
5. describe two ways human activities contribute to increased co₂ emissions.
6. compare and contrast renewable and non - renewable energy sources.
7. if you want to reduce your personal carbon footprint, list three specific actions you could take.
8. design a poster showing the 3r principle (reduce, reuse, recycle) in action.

Explanation:

1. Climate is the long - term average of weather conditions in a particular area, including temperature, precipitation, wind patterns over decades or longer.
2. Three greenhouse effect gases are carbon dioxide ($CO_2$), methane ($CH_4$), and water vapor ($H_2O$).
3. Only about 2.5% of Earth's water is freshwater, and of that, only a small fraction is readily drinkable, approximately 0.3% of all water on Earth.
4. The greenhouse effect works like a greenhouse. Sunlight enters the Earth's atmosphere, warms the surface. Greenhouse gases trap some of the heat radiated back from the surface, preventing it from escaping into space, thus warming the planet.
5. Two ways human activities contribute to increased $CO_2$ emissions are burning of fossil fuels (coal, oil, gas) for energy and deforestation (trees absorb $CO_2$, and cutting them reduces this natural sink).
6. Renewable energy sources like solar, wind, hydro are replenishable and have low - environmental impact. Non - renewable sources like coal, oil, natural gas are finite and often have high environmental impact, especially in terms of greenhouse gas emissions.
7. To reduce personal carbon footprint: use public transportation, reduce energy consumption at home (turn off lights, use energy - efficient appliances), and eat less meat (livestock farming is a significant source of methane).
8. A poster for the 3R principle could show images of reducing waste (e.g., using reusable bags instead of plastic), reusing items (e.g., a jar being reused as a storage container), and recycling (e.g., sorting of different materials like paper, plastic, metal for recycling).

Answer:

1. Climate is the long - term average of weather conditions in a region.
2. Carbon dioxide, methane, water vapor.
3. Approximately 0.3% of Earth's water is drinkable.
4. Sunlight enters, warms Earth. Greenhouse gases trap heat radiated back, like a greenhouse.
5. Burning fossil fuels, deforestation.
6. Renewable: replenishable, low environmental impact. Non - renewable: finite, high environmental impact.
7. Use public transportation, reduce home energy use, eat less meat.
8. Images of reducing, reusing, and recycling items.