8th science Midterm Review

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What is a heterogeneous mixture?

Back

A heterogeneous mixture is a type of mixture where the components are not uniformly distributed, and different parts can be seen and separated, such as sand and water.

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Can elements be broken down into simpler substances?

Back

No, elements cannot be broken down into simpler substances; they are the simplest form of matter.

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Why is it useful for scientists to synthesize compounds found in nature?

Back

It is useful to synthesize compounds when harvesting them from nature is too expensive or could harm the environment.

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NGSS.MS-PS1-3

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What is carbon dioxide classified as?

Back

Carbon dioxide is classified as a compound, which is a substance formed when two or more elements are chemically bonded together.

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NGSS.MS-PS1-1

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What are renewable resources?

Back

Renewable resources are natural resources that can be replenished naturally over time, such as solar energy, wind energy, and timber.

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What are nonrenewable resources?

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Nonrenewable resources are natural resources that cannot be replenished in a short period of time, such as fossil fuels and minerals.

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What is the impact of over-harvesting natural resources?

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Over-harvesting can lead to environmental damage, loss of biodiversity, and depletion of resources.

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NGSS.MS-ESS3-4

NGSS.MS-LS2-4

NGSS.MS-LS2-5

Front

What is a compound?

Back

A compound is a substance formed when two or more different elements are chemically bonded together, such as water (H2O) or carbon dioxide (CO2).

Tags

NGSS.MS-PS1-1

Front

What is the difference between a mixture and a compound?

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A mixture is a combination of two or more substances that retain their individual properties, while a compound is a substance formed from the chemical combination of two or more elements.

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What is the significance of understanding the impacts of producing synthetic materials?

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Understanding the impacts helps assess environmental, economic, and social consequences of using synthetic materials compared to natural resources.

Tags

NGSS.MS-PS1-3