Which of the following is not considered a source of dissolved CO2 in the aquatic environment
Sodium chloride salts dissolved in water
The atmosphere
Pollutants from some factories that are discharged into the water
Breathing of fish and molluscs
Which human activities reduce the pH value of freshwater lake water?
Overfishing
Planting trees on the sides of the lake
Using sailboats for recreation
Agricultural drainage water for the lake
If the rate of energy flow from green algae to the aquatic larvae that feed on them decreases, this may be an indication of ..
Increase in the percentage of dissolved oxygen in the water
Decrease in the percentage of carbon dioxide dissolved in the water
Organic remains have caused algae to lose their ability to produce energy
Increase in the number of mollusks that feed on the larvae
Calcium carbonate is soluble in water
False
True
Which of the following is not a result of increasing the percentage of dissolved carbon dioxide in water ..
Difficulty in breathing aquatic organisms
Decrease in the pH value of water
Increase in the ability of plants to produce food
Converting calcium bicarbonate to calcium carbonate
Which of the following reduces the rate of oxygen solubility in water ..
Dissolving more carbon dioxide
Decrease in water salinity
Increase in the rate of photosynthesis
Water turbulence and waves
Which of the following increases the acidity of water in water bodies
Formation of calcium carbonate
Rain loaded with carbon dioxide
Increase in the amount of heat absorbed by water
Increase in the percentage of oxygen in water
Which of the following, if increased, leads to an increase in the percentage of dissolved oxygen in the water .
Temperature Water
The process of photosynthesis
Concentration of salts and water
Air pollutants
Which of the following reduces the percentage of carbon dioxide in the water
Respiration of marine animals
Gas exchange between water and the atmosphere
Industrial pollution
Photosynthesis of algae
What is the effect of the high level of dissolved oxygen in water on the efficiency of the respiration process in living organisms?
Hinders it
Enhances it
Does not affect it
Reduces it
Which of the following represents an increase in its percentage in seawater that is harmful to mollusks and corals
Phytoplankton
Seaweed
Oxygen gas
Carbon dioxide gas
The lack of gas resulting from the respiration process in water doesn't affect the flow of energy in aquatic food chains
A plant in a certain aquatic environment converts a percentage of solar energy amounting to X into chemical energy stored in its food. If this percentage decreases over time, which of the following is associated with this…
Increase in the number of molluscs
Decrease in the percentage Oxygen in water
Increase in the activity of organisms
Increase in the pH value of the water
Which of the following increases the activity of fish in the aquatic environment
Increase the salinity of the water
Decrease the pH value of the water
Increase the percentage of dissolved oxygen in the water
Increase the impact of human activities on the water
If the amount of oxygen dissolved in one liter of river water at a temperature of 20°© is about 10 mg, what is its potential amount in one liter of ocean water when the temperature drops .... mg
10
5
7.5
12
Which of the following statements is correct about life in the aquatic environment
Increased organic decomposition in water is accompanied by a decrease in water acidity
Increased acidification is accompanied by increased respiration
Increased water acidity is accompanied by a decrease in calcification
Increased respiration is accompanied by increased calcification
The ratio between the concentrations of carbon dioxide and oxygen gases in the air ....
0.002
500
0.05
0.03
When comparing the solubility of Co2 and the solubility of O2 in water at different temperatures, we find that ..
Solubility of both gases is equal at low temperatures
Solubility of both gases is equal at high temperatures
The solubility of O2 is higher than Solubility of CO2 at low temperatures
Solubility of CO2 is less than solubility of O2 at high temperatures
Calcium bicarbonate is sparsely soluble in water
Which organisms are directly affected in the food chain by the decrease in the concentration of carbon dioxide in the water?
Small fish
Decomposers
Predatory fish
Producers
The factor(s) that affect the rate of dissolution of oxygen and carbon dioxide gases in water is / are ...
All of the above
Temperature
Availability of waves and water turbulence
Type of water (fresh or salty)
Studies have shown that the temperature of the upper part of the ocean waters has risen by a certain amount every ten years during the last hundred years. In light of what you have studied, which of the following is one of the main reasons for this...
Decrease in ocean acidity
Increase in the alkalinity of ocean water
Decrease in the percentage of dissolved salts in the water
Increase in the percentage of carbon dioxide in the air
All of the following supports the balance of the aquatic ecosystem except...
Increase in the concentration of dissolved oxygen in water
Diversity of aquatic organisms
Increase in water temperature
Which of the following factors lead to an increase in the percentage of carbon dioxide dissolved in the water
Decomposition of organic matter and decreased temperature
Respiration of aquatic organisms and increased salinity of the water
Increase in the salinity of water and industrial pollution
Increase in the percentage of phytoplankton and increased temperature