Human impact on the environment

Front

The 2 main gas contributors to the enhanced greenhouse effect?

Back

carbon dioxide and methane

Front

Wastes produced by agriculture, households, industry, mining, and other human activities can end up in ______________.

Back

All of these choices

Front

About 97% of the water on Earth is ___________________.

Back

salt water

Front

How does eutrophication affect other organisms in water when fertilizers increase nitrogen content?

Back

Oxygen is used up as algae is decomposed, reducing the amount available to other organisms.

Front

Which historical event most likely triggered the largest increase in the human population? Options: the Black Death plague (mid-1300s), the domestication of wheat crops (around 8000 B.C), the fall of the Roman Empire (around A.D. 800), the Industrial Revolution (late 1700s)

Back

the Industrial Revolution, which began in the late 1700s

Front

largest number of individuals of a population that the environment can support

Back

carrying capacity

Front

Which has the least negative impact on wildlife habitat? Options: agriculture, development, deforestation, recreation

Back

recreation

Front

Less rainfall in an area and higher temperatures could lead to:

Back

desertification

Front

Reasons deforestation occurs:

Back

Clearing land for agriculture, ranching, and mining

Front

Fossil fuels are an important natural resource used by society. Which of the following best describes fossil fuels?

Back

They are organic fuels derived from ancient plants and animals.