Science 9 Unit C 2.0 Review

Assuming that winds typically come from the Southwest, what site would have the highest pollution?

• Site A

• Site B

• Site C

• Site D

Assuming that winds typically come from the Northwest, where would be the cleanest place to build a home?

• Site A

• Site B

• Site C

• Site D

Which of the following most likely caused a change in the air quality in country X over five days?

• wind speed and direction

• wind direction and amount of carbon dioxide

• wind speed and temperature

• temperature and amount of carbon dioxide

Scientific studies have shown that the mercury content in the northern pike (a fish) is extremely high in some Alberta lakes. The pike is the last link in a food chain. Based on the information given, the scientific study most likely had to do with…

• Biomagnification

• Phytoremediation

• Biodegradation

• Dispersion

Which organism shown in the food chain above would contain the greatest concentration of chemical pollutants?

• phytoplankton

• krill

• tuna

• shark

Fertilizer from agricultural run-off can enter nearby streams and lakes. One effect that this has on the water environment is that…

• the water is poisoned

• the oxygen content of the water drops

• aquatic plant growth decreases

• fish and other large animals increase in population

An abundance of which of the following would indicate that water is polluted?

• trout and other game fish

• sludge worms and leeches

• salamanders and turtles

• variety of insect larvae

Below is a chart of test results from water samples taken at various sites. Which of the following best describes the results from these sites?

• Site 1 is unhealthy because of its dissolved oxygen levels are too high.

• Site 3 and 4 are unhealthy because the temperature is too low.

• Site 2 is unhealthy because the pH is too high and the temperature is too low.

• Site 5 is unhealthy because the temperature is too high and the dissolved oxygen is too low.

At which of the four locations would you most likely see evidence of an algae bloom?

• Location 1

• Location 2

• Location 3

• Location 4

Which human activities are the main causes of acid rain?

• A and B only

• B and D only

• C and D only

• A and D only