Human Impact on Environment

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Exponential growth Noun

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[ek-spoh-nen-shuhl grohth]

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Exponential growth

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A growth pattern where the rate of reproduction is constant, causing a population to grow faster as it gets larger.

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Example: A graph showing how bacteria population grows rapidly over time, illustrating exponential growth.

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Birth rate Noun

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[burth rayt]

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Birth rate

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The number of live births per 1,000 individuals within a population over a specific period of time.

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Example: A bar graph showing birth rates per 1,000 women illustrates how birth rate data is represented.

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Death rate Noun

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[deth rayt]

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Death rate

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The number of deaths per 1,000 individuals within a population over a specific period of time.

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Example: A bar chart showing child death rates per 1,000 births by mother's education level, explaining the impact of education on death rates.

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Natural resource Noun

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[nach-er-uhl ree-sors]

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Natural resource

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Any material or substance that occurs naturally in the environment and is used by humans for their benefit.

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Example: The image shows natural resources like trees and sunlight at a beach, used by humans.

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Renewable resource Noun

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[ri-noo-uh-buhl ree-sors]

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Renewable resource

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A natural resource that is always available or is naturally replenished in a relatively short period of time.

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Example: Solar panels convert sunlight into renewable electricity, showing how solar energy is a renewable resource.

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Nonrenewable resource Noun

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[non-ri-noo-uh-buhl ree-sors]

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Nonrenewable resource

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A natural resource that exists in a fixed amount and is not replaced within a human lifetime.

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Example: The image shows how marine organisms become oil and gas over millions of years, explaining nonrenewable resources.

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Pollution Noun

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[puh-loo-shuhn]

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Pollution

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The introduction of harmful materials or contaminants into the environment, affecting Earth's land, water, or air.

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Example: A cartoon Earth surrounded by smoke and vehicles shows pollution affecting air quality.

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Point source Noun

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[point sors]

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Point source

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A single, identifiable origin of pollution from which pollutants are discharged, such as a pipe or smokestack.

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Example: A smokestack releasing pollutants into the air is a point source of pollution.

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Nonpoint source Noun

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[non-point sors]

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Nonpoint source

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A diffuse source of pollution that is widely spread and cannot be traced to a single origin.

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Example: The image shows various sources like city streets and cropland contributing to nonpoint source pollution in a river.

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Deforestation Noun

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[dee-for-uh-stey-shuhn]

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Deforestation

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The large-scale removal of trees from forests to convert the land for non-forest uses like agriculture or development.

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Example: The image shows tree stumps and logs, illustrating deforestation as the removal of trees.