Study Guide Review: Topic 7 Human Impact on the Environment

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What are natural causes of a small amount of air pollution?

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Forest Fires and Volcanic Eruptions are natural causes of air pollution.

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What occurs when freshwater from land enters the ocean after heavy rains, causing the salinity to drop?

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Freshwater Runoff is the process where freshwater enters the ocean, reducing salinity.

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What are small particles of rocks and sand carried by water that can cover up sources of food and block sunlight?

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Sediment refers to small particles of rocks and sand that can block sunlight and cover food sources.

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What type of pollution is widely spread and cannot be tied to a specific origin, like runoff of chemicals from roads?

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Nonpoint Source pollution is pollution that cannot be traced to a single source.

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What is the term for when the number of humans exceeds the available resources?

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Overpopulation occurs when the human population surpasses the resources available.

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What is the impact of deforestation on the environment?

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Deforestation leads to loss of biodiversity, increased carbon dioxide levels, and disruption of water cycles.

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What is the greenhouse effect?

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The greenhouse effect is the warming of Earth due to trapped heat from greenhouse gases.

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What is an example of a renewable resource?

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Solar energy is an example of a renewable resource that can be replenished.

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What is habitat destruction?

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Habitat destruction is the process where natural habitats are rendered unable to support the species present.

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What is pollution?

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Pollution is the introduction of harmful substances into the environment.