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WorksheetsAquatic Ecosystem Quiz
Total questions: 15
Worksheet time: 8mins
What is the ratio of hydrogen to oxygen in water?
2:1
1:2
1:1
What percentage of Earth's water is fresh water?
1%
3%
70%
What happens to the density of water as it freezes?
It increases
It decreases
It remains the same
What is the pH value of pure water?
7
6
8
What is the main source of oxygen in water?
Atmospheric air
Carbon dioxide
Hydrogen
What is the normal salinity of ocean water?
35 grams per liter
10 grams per liter
50 grams per liter
What is the effect of temperature on water density?
Density increases with temperature
Density decreases with temperature
Density remains constant
What is the role of hydrogen bonds in water?
Increase boiling point
Decrease boiling point
No effect
What happens to the concentration of hydrogen ions when sodium bicarbonate is added to water?
Increases
Decreases
Remains the same
What is the main process of the water cycle that leads to cloud formation?
Evaporation
Condensation
Precipitation
Which of the following is a physiological adaptation in deep ocean fish?
Compressed body
Strong arteries
Increasing blood pressure
Large gills
Which of the following adaptations enables deep-sea fish to cope with deficiency of oxygen?
Slower metabolic rate
Compressed body
High concentration of salts in the cells
Strong blood vessels
What does smoltification represent in salmon?
Behavioral adaptation
Physiological adaptation
Structural adaptation
Physiological and structural adaptation
Which of the following is a similarity between amoebas and fish?
Cellular respiration
Gas exchange organ
Number of cells in the body
Mechanisms of osmoregulation
Which of the following helps minimize water resistance to fish movement in water?
Scales only
Mucus only
Mucus and streamlined body
Streamlined body, mucus, and scales
