Human Events and the Environment Answers

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Which of the following best explains how human activities can directly contribute to landslides?

Removing plants from hillsides eliminates the root structures that anchor soil.

Clearing trees from hills increases the frequency of rainstorms.

Human activities tend to reduce the risk of fires.

Landslides are not impacted by human activities.

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Which of the following is not true concerning the impact of volcanoes?

Acid rain can result from volcanic eruptions.

Tephra are a combination of water and rubble.

Damage can continue for years after the initial eruption.

The volcanic explosion is the pyroclastic flow.

The damage caused by Tsunamis is restricted to the area surrounding the epicenter of the earthquake which caused it.

A dense mix of dry, hot rock fragments and hot gas erupting from volcanic vents at high speed is

pyroclastic flow.

lahar.

fumarole.

tephra.

The impacts of natural disasters are limited to property damage and loss of life.

Which of the following best explains why deforestation increases the risk of floods in an area?

Tree leaves catch and retain rain water.

Trees block the free flow of water.

Deforestation increases precipitation.

Tree roots improve soil water retention.

Human activities can have an impact on natural disasters.

Which of the following human activities can increase the risks of flooding?

clearing land for farming

planting trees

soil management

widening rivers

The rain that occurs after a volcano erupts would most likely be

acidic

basic

neutral

Which of the following is not an environmental impact of resource extraction?

loss of soil

increased resource supply

water contamination

loss of vegetation

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