Forests and Their Importance

What percentage of Earth's land surface is covered by forests?

• 50%

• 25%

• 40%

• 31%

Tags

NGSS.MS-LS2-5

Which type of forest covers the largest area of the world's remaining forests?

• Mangrove forest

• Temperate forest

• Boreal forest

• Tropical rain forest

What is the primary role of foresters?

• To clear forests for agriculture

• To plant new trees

• To balance the ecological and economic importance of forests

• To protect wildlife

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NGSS.MS-LS2-5

According to a 2005 survey by the United Nations, what fraction of the world's forests were used mostly for timber production?

• Two thirds

• More than one third

• Less than one third

• Half

Which of the following is NOT a service provided by forests?

• Maintenance of biogeochemical cycles

• Conservation of biodiversity

• Production of fossil fuels

• Protection of soil and water quality

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NGSS.MS-LS2-5

Why do mature forests generally have more biodiversity than younger forests?

• They have more sunlight

• They are located in more diverse climates

• They are less affected by human activity

• They have a more complex structure

Tags

NGSS.MS-LS2-5

NGSS.MS-LS2-4

How do forest plants help regulate the water cycle?

• By releasing more carbon dioxide

• By absorbing more sunlight

• By increasing soil erosion

• By slowing runoff and reducing flooding

Tags

NGSS.MS-ESS2-4

NGSS.MS-LS2-3

Which of the following is a medicinal use of forest plants?

• Production of rubber

• Manufacture of textiles

• Source of biofuels

• Treatments for cancer

What is the significance of the drug paclitaxel?

• It is a spice derived from forest plants

• It treats several kinds of cancer

• It is used in the production of paper

• It is a type of timber

Which forest plant is the source of treatments for leukemia and Hodgkin’s lymphoma?

• Madagascar rosy periwinkle

• Pacific yew tree

• Eucalyptus

• Cinchona tree