Affiliate Marketing Secrets

What factors interact to produce smog?
a. sunlight and pollutants from fossil fuels
b. particulates and pollutants from fossil fuels
c. sunlight and oxygen
d. sunlight and acid rain
Which of these practices has contributed to the depletion of fish populations worldwide?.
a. fishing bans
b. catching reproduction-age fish
c. rotating catches
d. harvest reduction
Question 4
A predator might control an introduced species by
a. keeping the population from increasing.
b. causing habitat fragmentation.
c. increasing available niches.
d. reducing biodiversity in the area.
Question 5
Which level of the food chain is most affected by biomagnification?
a. secondary consumers
b. producers
c. tertiary consumers
d. primary consumers
What would Earth be like without the greenhouse effect?
a. the same temperature as it is now
b. too cold to be habitable
c. a little cooler than it is now
d. a little warmer than it is now
Question 7
Cutting down an entire forest ecosystem is known as
a. selective cutting.
b. clear cutting.
c. harvest reduction.
d. sustainable development.
Question 8
Which of these would probably lead to a decrease in global warming?
a. an increase in the amount of water vapor in the atmosphere
b. a decrease in the amount of methane in the atmosphere
c. an increase in the amount of carbon dioxide in the atmosphere
d. a decrease in the amount of oxygen in the atmosphere
Question 9
What are renewable resources?
a. resources that formed over millions of years
b. resources that can replenish themselves over time
c. resources that exist only in rural areas
d. resources that are used faster than they form
Question 10
How many people can Earth support?
a. 20 billion
b. 50 billion
c. an unknown number
d. 10 billion
Question 11
Because the manatee is an umbrella species, protecting it may lead to
Choose one answer.
a. protection of many other species.
b. pollution of waterways.
c. decreased seagrass.
d. increased boating in their habitat.
Question 12
Which of the following is correct?
a. All ozone in the atmosphere is harmful.
b. Ozone in the stratosphere is helpful but ground-level ozone is harmful.
c. All ozone in the atmosphere is helpful.
d. Ozone in the stratosphere is harmful but ground-level ozone is helpful.
n what biome is biodiversity the highest?
a. temperate forests
b. deserts
c. grasslands
d. tropical rain forests
Question 14
Canned tuna made from small fish is generally considered to be safer to eat than canned tuna from large fish. Large fish have more pollutants
a. because they drink more water.
b. because they live in more polluted water.
c. due to their larger surface area.
d. due to biomagnification.
Question 15
How has the introduction of kudzu affected native species in the southeastern United States?
a. It has increased erosion, so native plants cannot grow.
b. It has covered native plants, depriving them of sunlight.
c. It has attracted animals that eat native plants.
d. It has helped native plants survive harsh weather.
Why are frogs sensitive to pollutants in water?
a. They are not an indicator species.
b. They have a small body mass.
c. They need low-oxygen conditions.
d. They have water-soluble skins.
Question 18
Which statement best describes Earths human carrying capacity?
a. increasing due to improved technology and medicine.
b. decreasing due to increasing population.
c. decreasing due to decreasing death rates.
d. a fixed number that we will soon exceed.
Question 19
Why are humans less sensitive than frogs to pollutants in water?
a. Humans do not have water-soluble skin.
b. Humans do not need water.
c. Humans are affected only by airborne pollutants.
d. Humans need low-oxygen conditions.
Question 20
What causes the level of carbon dioxide in Earths atmosphere to rise and fall over hundreds of thousands of years?
a. ice ages
b. the greenhouse effect
c. natural climate cycles
d. human activities