MCA Review (Page 12) Human Interaction with Earth's Systems

What is the impact of human use of natural resources on Earth's systems?

• It has no significant impact.

• It improves Earth's natural systems.

• It disrupts and usually harms Earth's systems.

• It increases Earth's natural resources.

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What makes it challenging to restore Earth's ecosystems and climate systems to their original state?

• Because it is less important than economic development.

• Despite being possible, it is very expensive and time-consuming.

• Because human activities do not significantly impact Earth.

• Because many competeing human interests have more economic value

• Because many people underestimate human dependence on a healthy planet.

Answer explanation

Sustainable buisness practices consider social and environmental imapces while making a profit.

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How does an increase in the human population affect Earth's natural resources?

• Decreases the demand for resources

• Has no impact on natural resources

• Creates a higher demand for resources, but they are not renewing fast enough

• Improves the renewal rate of natural resources

Answer explanation

All ecosystems have a "Carrying Capacity" Earth isn't getting bigger but the human population is.... Exponetially...

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What is one major impact of humans' use of fossil fuels on Earth's atmosphere?

• It increases the oxygen levels in the atmosphere

• It releases carbon dioxide into the atmosphere which causes climate change, other harmful pollutants damage the atmosphere

• It enhances the protective ozone layer

• It reduces the amount of sunlight reaching Earth

Answer explanation

It releases carbon dioxide into the atmosphere which causes climate change, other harmful pollutants damage the atmosphere

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What are some possible solutions to the problems that humans cause for Earth and Earth's systems?

• Increase use of fossil fuels, deforestation, industrial waste

• Reduce air pollution, recycle, reuse, use less water

• Promote single-use plastics, increase chemical dumping, urban sprawl

• None of the above

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What is a characteristic of non-renewable energy sources?

• They can be easily replaced.

• They are unlimited.

• They cannot be replaced once used up.

• They are mostly derived from natural elements that regenerate quickly.

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Which of the following is a feature of renewable energy sources?

• They deplete over time and cannot be replenished.

• They are available in limited quantities.

• They regenerate quickly and are considered unlimited.

• They are primarily fossil-based.

How is global warming primarily described?

• The increase in Earth's average temperature due to natural phenomena.

• The spike in Earth's average temperature after the industrial revolution.

• A temporary change in climate patterns

• The cooling down of the planet due to reduced solar activity

Answer explanation

Notice on the graph when the invition of the coal fired steam engine happened. What have we done with fossil fuesl since?

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According to the text, what is a major contributor to global warming?

• Solar flares increasing solar radiation on Earth

• Deforestation and the loss of biodiversity

• Human activities, such as burning fossil fuels

• Volcanic eruptions releasing ash into the atmosphere

Answer explanation

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How does increased CO₂ in the atmosphere affect global warming?

• It decreases the temperature of the Earth.

• It has no significant effect on the Earth's temperature.

• It absorbs infrared light like a greenhouse and warms the Earth.

• It increases oxygen levels in the atmosphere.

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