pH
Dissolved Oxygen
Temperature
Nitrates & Phosphates
Turbidity
100
What does pH measure? a. acidity/alkalinity b. dissolved oxygen c. nutrient level d. turbidity
a. acidity/alkalinity
100
What most directly affects the amount of dissolved oxygen in a body of water? a. pH b. salinity c. turbidity d. temperature
d. temperature
100
Which is a significant impact of global warming on coral reefs? a. Coral reefs will flourish in warmer water. b. Global warming has no impact on coral reefs. c. Coral reefs will easily adapt to environmental changes. d. Major changes in ocean temperature are harmful to coral reefs.
d. Major changes in ocean temperature are harmful to coral reefs.
100
Which of the following are not possible sources of nitrates in an aquatic ecosystem? a. decomposing plant material b. improperly installed septic systems c. fertilizer runoff d. dissolved oxygen e. improperly treated wastewater
d. dissolved oxygen
100
Which event may cause increased turbidity in a lake or pond? a. increase in runoff b. decrease in runoff c. increase in aquatic plants d. decrease in aquatic plants
a. increase in runoff
200
Which is an accurate prediction of the pH of a lake that receives large amounts of acid rain? a. 10-11 b. 8-9 c. 6-7 d. 4-5
d. 4-5
200
Which event will lead to the greatest reduction of dissolved oxygen in a lake? a. increased nutrients and algal blooms b. decreased number of fish in the lake c. increased number of fish in the lake d. decreased number of plants surrounding the lake
a. increased nutrients and algal blooms
200
Which of the following water samples would have the highest dissolved oxygen levels? a. a water sample collected on a winter day (35° F) b. a water sample collected, left sitting in the sun for two hours and then tested. c. a water sample collected on a summer day (82°F) d. a turbid water sample
a. a water sample collected on a winter day (35° F)
200
Which of the following products was once a major source of phosphates in aquatic ecosystems? a. deodorants b. detergents c. sodas d. body lotions e. hair sprays
b. detergents
200
Which measurement uses clarity to test the quality of a body of water? a. pH b. turbidity c. bioindicators d. dissolved oxygen
b. turbidity
300
If a newly found fish species tends to live in mildly acidic water, which is the best estimate of the pH of the water? a. 0-2 b. 5-6 c. 7-8 d. 13-14
b. 5-6
300
The oxygen level in a river drops below 5 ppm. What is the most likely result? a. Fish will die. b. Plants will flourish. c. The pH level will change. d. Water temperature will rise.
a. Fish will die.
300
Why would a fish have a higher respiration (breathing) rate in warmer temperature water? a. It would be more active. b. It breathes faster because there is less dissolved oxygen in the water. c. Respiration rate wouldn't change with warm water. d. Higher temperature will speed up fish's heart. d.
b. It breathes faster because there is less dissolved oxygen in the water.
300
Which statement summarizes the relationship between agricultural fertilizer runoff and nitrates in a body of water? a. as runoff increases, nitrate levels increase. b. as runoff increases, nitrate levels decrease. c. as runoff decreases, nitrates cause algae to decrease. d. as runoff decreases, nitrates cause temp. to increase
a. as runoff increases, nitrate levels increase.
300
Fish living in turbid water may experience which effects? a. increased skin damage b. increased pH in the water c. increased gill clogs d. decreased ability to photosynthesize
c. increased gill clogs
400
A solution that is ________ has a pH of 7. a. acid b. basic c. neutral d. none of the above
c. neutral
400
The amount of dissolved oxygen found in a lake would be decreased by which human activity? a. boating b. swimming c. planting trees d. adding nitrates
d. adding nitrates
400
Which technology best monitors temperature changes in Earth’s oceans? a. radar b. satellites c. sonar d. microwave
b. satellites
400
Which would a scientist expect to find in a lake that experienced a sudden increase in nitrate levels? a. an increase in temperature b. an increased number of fish c. clear water with an unusual odor d. an increase in algae and aquatic plants
d. an increase in algae and aquatic plants
400
Which would likely be true of a lake with high turbidity level? a. The lake would have low pH levels. b. The lake would have few life forms. c. The lake would have high levels of oxygen. d. The lake would have a large amount of algae.
b. The lake would have few life forms.
500
What is a solution that has an excess of H+(hydrogen) ions? a. pH b. acid c. neutral d. base
b. acid
500
Which best explains the importance of dissolved gases in the oceans? a. They help control pollution. b. They help provide oxygen for aquatic animals. c. They help maintain a constant water temperature. d. They help maintain constant levels of salinity.
b. They help provide oxygen for aquatic animals.
500
Which temperature range of ocean water can indicate danger for aquatic wildlife? a. 5°C to 10°C b. 15°C to 20°C c. 25°C to 30°C d. 35°C or higher
d. 35°C or higher
500
N, P and K means: a. Nitrogen, Phosphorous and a constant for oxygen. b. Nitrogen Phosphorous and Potassium. c. Nitrogen, Potassium, Krypton d. nutrients, pollution, Kelvin
b. Nitrogen Phosphorous and Potassium.
500
An increase in the turbidity in a lake is most likely the result of which human activity? a. increased vehicle travel b. improper wildlife management c. introduction of foreign species d. increased land clearing for development
d. increased land clearing for development
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