6th Grade Human Impacts Review

Human activities and natural events can damage the environment.

• True

• False

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Current agricultural technologies use chemicals on crops and livestock, specialized breeding of plants, soil quality monitoring, and modern farm equipment.

Which negative effect do these have on the environment?

• Replacement of plants with more resistant breeds.

• Some chemicals have killed the livestock.

• Use of smaller areas of land to produce crops.

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Which of the following is an example of a natural source of air pollution?

• Dust from construction sites

• Methane gas from cow manure

• Car exhaust fumes

• Smoke from the burning of fossil fuels

How can the removal of trees have a negative impact on the birds in an area?

• The bird population will stay the same because humans love birds.

• The bird population will increase because humans interfere with wild animals.

• The bird population will decrease due to competition for resources such as food and nesting sites.

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Organize these options into the right categories

Groups:

(a) Human Impact

,

(b) Natural Event

• Coal is mined and burned to produce electricity.

• Carbon dioxide is released when grasses decay.

• Volcanic eruption spews toxic gases such as carbon dioxide, sulfur dioxide, and ash.

• Loggers cut down trees, increasing the amount of carbon dioxide in the atmosphere.

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According to the bar chart, which of the following has contributed the most to the increase in greenhouse gas emissions?

• Coal

• Oil

• Natural Gas

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The data shows that from 1850 to 1950, the level of SO₂ emitted in North America

• Remained the same

• Increased

• Decreased

Over time, the level of SO₂ emitted in East Asia has

• Remained the same

• Increased

• Decreased

Read the passage and study the map to answer this question:

Which of the following is a correct statement?

• Feral swine originated in the U.S and the population will remain the same.

• Feral swine is a native species to the U.S and the population will continue to decrease.

• Feral swine is a native species to the U.S and the population will continue to increase.

• Feral swine is an invasive species to the U.S and the population will continue to increase.

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Study the graph and complete the following statement: As human population______________________________________.

• Decreases, the number of extinct animals decreases.

• Increases, the number of extinct animals increases.

• Increases, the number of extinct animals decreases.

• Decreases, the number of extinct animals increases.

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