Human Effects Review

What happens when humans cut down forests to build shopping malls?

• Plants and animals thrive in the new environment and pollution decreases.
• New animals species form and plants produce more oxygen.
• The shopping mall reduces the amount of pollution in the area.
• Habitat is altered, plants and animals destroyed, and pollution increases.

What will most likely decrease the size of a habitat?

• Clearing land to build a house.
• Using public transportation.
• Recycling once a week.
• Conserving water on a daily basis.

Which of the following are positive effects humans have on an ecosystem?

• Compost piles for garbage and build shopping centers away from neighborhoods
• Establish wildlife reservations and national forests and compost piles for garbage
• Establish wildlife reservations and build shopping centers away from neighborhoods.
• Use only tropical rainforests for lumber and agriculture and compost piles for garbage

Which statement summarizes the chart?

• As the population of the world increases, the amount of carbon emissions decreases. 
• As the population of the world decreases, the amount of carbon emissions increases. 
• As the population of the world increases, the amount of carbon emissions increases.
• As the population of the world decreases, the amount of carbon emissions decreases.

Zebra mussels and kudzu vine are both alien species brought to America.  Why do alien species thrive in their new habitat?

• The alien species are always autotrophs.
• The new habitat is free of pollution.
• The alien species are weaker.
• The new habitat often lacks natural predators of the alien species.

Increased carbon dioxide may cause global warming by trapping more ____________ in the atmosphere.

• water
• gases
• heat
• water vapor

The main human activity that releases greenhouse gases is

• using public transportation and there by reduce the affects of greenhouse gases.

• burning fossil fuels

• texting on cellphones

• eating meat

Which natural process removes carbon dioxide from the atmosphere?

• forest fires
• volcanic eruptions
• cellular respiration
• photosynthesis

Which of the following have been linked to climate change?  

• droughts
• flooding
• melting of polar ice caps
• all of the above

Burning fossil fuels (like coal) to generate electricity releases sulfur dioxide and nitrogen oxides which react with gases in the atmosphere. This leads to precipitation called:

• ozone

• acid rain

• greenhouse gases

• methane