Unit 2 Exam Review

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What is Global Warming?

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

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What are the effects of Global Warming?

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Effects include melting polar ice caps, rising sea levels, increased frequency of extreme weather events, and changes in ecosystems.

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What is the role of mitochondria in cells?

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Mitochondria are known as the 'powerhouse' of the cell because they produce energy in the form of ATP through cellular respiration.

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What is cellular respiration?

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Cellular respiration is the process by which cells convert glucose and oxygen into energy (ATP), carbon dioxide, and water.

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What is a reactant in a chemical reaction?

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A reactant is a substance that is consumed during a chemical reaction to form products.

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What is photosynthesis?

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Photosynthesis is the process by which green plants use sunlight to convert carbon dioxide and water into glucose and oxygen.

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What is nitrogen fixation?

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Nitrogen fixation is the process of converting nitrogen gas from the atmosphere into a form that plants can use, typically ammonia.

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Why can't plants and animals use nitrogen directly from the air?

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Plants and animals cannot use nitrogen directly from the air because it exists as a diatomic molecule (N2) which is not reactive and cannot be absorbed by them.

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What is the significance of glucose in cellular respiration?

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Glucose is a primary reactant in cellular respiration, providing the energy needed for cellular processes.

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What are greenhouse gases?

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Greenhouse gases are gases that trap heat in the atmosphere, contributing to the greenhouse effect and global warming.