Forces of Nature: Constructive and Destructive Changes on Earth

Mrs. Eller discusses the constructive and destructive forces of nature, focusing on wind, water, ice, volcanoes, and earthquakes. She explains how these forces can both build up and break down the earth's surface, using examples like weathering, erosion, and deposition. The video includes a hands-on demonstration with graham crackers to illustrate tectonic plate movements and their effects.

Which of the following is NOT considered a natural force that changes the earth?

• Fire

• Water

• Ice

• Wind

What is the effect of wind when it moves sand from one place to another?

• Destructive

• None of the above

• Constructive

• Neutral

When wind deposits sand to form new patterns, it is considered:

• Destructive

• Constructive

• Neutral

• None of the above

How does water contribute to the creation of new land?

• By depositing sediment

• By weathering rocks

• By evaporating

• By eroding soil

What happens when water weathers rock?

• It builds up the rock

• It breaks the rock apart

• It colors the rock

• It melts the rock

What is the result of ice expanding in the cracks of rocks?

• The rock changes color

• The rock breaks apart

• The rock becomes larger

• The rock becomes smoother

When glaciers move and carve out valleys, this process is:

• Destructive

• None of the above

• Constructive

• Neutral

What type of volcanic activity is considered constructive?

• Explosive eruptions

• Lava cooling and forming new rock

• Lava destroying forests

• Ash clouds

How can earthquakes be constructive?

• By breaking apart land

• By forming new land features

• By causing landslides

• By creating tsunamis

Which of the following is a characteristic of a destructive earthquake?

• It breaks apart the earth's surface

• It deposits new soil

• It creates new islands

• It forms new mountains