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unit 10
Evidence of Climate Change
| Question | Answer |
|---|---|
| carbon cycle | he continuous, natural process by which carbon atoms travel between the atmosphere, Earth’s surface (land/oceans), and living organisms. |
| carbon emissions | release of carbon-based gases—most commonly carbon dioxide and methane—into the atmosphere. |
| greenhouse gases | gases in Earth’s atmosphere—such as carbon dioxide, methane, and water vapor—that trap heat from the sun near the surface, acting like a blanket to keep the planet warm. |
| greenhouse effect | a natural process where atmospheric gases (like and methane) trap heat radiating from Earth’s surface, preventing it from escaping into space and keeping the planet habitable |
| fossil fuels | non-renewable energy sources—specifically coal, petroleum (oil), and natural gas—formed from the buried remains of ancient plants and animals subjected to intense heat and pressure over millions of years |
| global warming | the long-term rise in Earth's average temperature, primarily caused by increased greenhouse gases (like and methane) from human activities such as burning fossil fuels and deforestation. |
| aerosols | tiny solid particles or liquid droplets suspended in a gas, usually air |
| natural causes of climate change | volcanic eruptions, meteor impact, greenhouse gases, global ocean currents |
| human activities that causes climate change | greenhouse gases, deforestation, urbanization |
| deforestation | the large-scale, permanent removal of trees and forests by humans to make room for other uses, such as farming, cattle ranching, or building infrastructure |
| urbanization | the process where more and more people move from rural areas (countryside) to cities, causing cities to grow in size and population |
| atmosphere | a thin, protective layer of gases (mostly nitrogen and oxygen) surrounding Earth, held in place by gravity |
| carbon | is a nonmetal chemical element (symbol C, atomic number 6) essential to life, forming the basis of organic chemistry and all living organisms |
| renewable energy | energy derived from natural, virtually inexhaustible sources that replenish themselves faster than they are consumed. |
| ocean currents | Ocean currents are continuous, directed movements of seawater, acting like vast rivers flowing in predictable patterns across the ocean surface or in deep water |
| acid rain | any form of precipitation—rain, snow, fog, or dust—with high levels of nitric and sulfuric acids, usually having a pH below 4.5. It is primarily caused by human activities like burning fossil fuels |