اختبار الكتروني -علوم المتكاملة لغات - اولى ثانوي -الوحدة الاولى -نموذج 3 - ترم اول - بدء الاختبار

Which of the following is not considered a source of dissolved CO2 in the aquatic environment

The atmosphere

Pollutants from some factories that are discharged into the water

Sodium chloride salts dissolved in water

Breathing of fish and molluscs

سؤال 1

الدرجة 1.00

Which of the following reduces the percentage of carbon dioxide in the water

Photosynthesis of algae

Respiration of marine animals

Gas exchange between water and the atmosphere

Industrial pollution

سؤال 2

الدرجة 1.00

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

7.5

سؤال 3

الدرجة 1.00

All of the following supports the balance of the aquatic ecosystem except...

Increase in water temperature

Increase in the rate of photosynthesis

Increase in the concentration of dissolved oxygen in water

Diversity of aquatic organisms

سؤال 4

الدرجة 1.00

Calcium carbonate is soluble in water

True

False

سؤال 5

الدرجة 1.00

Which of the following increases the activity of fish in the aquatic environment

Increase the impact of human activities on the water

Increase the percentage of dissolved oxygen in the water

Increase the salinity of the water

Decrease the pH value of the water

سؤال 6

الدرجة 1.00

The lack of gas resulting from the respiration process in water doesn't affect the flow of energy in aquatic food chains

False

True

سؤال 7

الدرجة 1.00

If the rate of energy flow from green algae to the aquatic larvae that feed on them decreases, this may be an indication of ..

Organic remains have caused algae to lose their ability to produce energy

Decrease in the percentage of carbon dioxide dissolved in the water

Increase in the percentage of dissolved oxygen in the water

Increase in the number of mollusks that feed on the larvae

سؤال 8

الدرجة 1.00

Which organisms are directly affected in the food chain by the decrease in the concentration of carbon dioxide in the water?

Predatory fish

Producers

Decomposers

Small fish

سؤال 9

الدرجة 1.00

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

Increase in the activity of organisms

Decrease in the percentage Oxygen in water

Increase in the pH value of the water

سؤال 10

الدرجة 1.00

Which human activities reduce the pH value of freshwater lake water?

Overfishing

Using sailboats for recreation

Agricultural drainage water for the lake

Planting trees on the sides of the lake

سؤال 11

الدرجة 1.00

Which of the following is not a result of increasing the percentage of dissolved carbon dioxide in water ..

Difficulty in breathing aquatic organisms

Increase in the ability of plants to produce food

Converting calcium bicarbonate to calcium carbonate

Decrease in the pH value of water

سؤال 12

الدرجة 1.00

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

سؤال 13

الدرجة 1.00

Which of the following statements is correct about life in the aquatic environment

Increased water acidity is accompanied by a decrease in calcification

Increased organic decomposition in water is accompanied by a decrease in water acidity

Increased respiration is accompanied by increased calcification

Increased acidification is accompanied by increased respiration

سؤال 14

الدرجة 1.00

The ratio between the concentrations of carbon dioxide and oxygen gases in the air ....

500

0.002

0.03

0.05

سؤال 15

الدرجة 1.00

Which of the following reduces the rate of oxygen solubility in water ..

Increase in the rate of photosynthesis

Water turbulence and waves

Dissolving more carbon dioxide

Decrease in water salinity

سؤال 16

الدرجة 1.00

Which of the following, if increased, leads to an increase in the percentage of dissolved oxygen in the water .

Concentration of salts and water

Temperature Water

The process of photosynthesis

Air pollutants

سؤال 17

الدرجة 1.00

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

Increase in the salinity of water and industrial pollution

Respiration of aquatic organisms and increased salinity of the water

Increase in the percentage of phytoplankton and increased temperature

سؤال 18

الدرجة 1.00

What is the effect of the high level of dissolved oxygen in water on the efficiency of the respiration process in living organisms?

Reduces it

Hinders it

Enhances it

Does not affect it

سؤال 19

الدرجة 1.00

Which of the following represents an increase in its percentage in seawater that is harmful to mollusks and corals

Phytoplankton

Oxygen gas

Carbon dioxide gas

Seaweed

سؤال 20

الدرجة 1.00

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 the percentage of dissolved salts in the water

Decrease in ocean acidity

Increase in the percentage of carbon dioxide in the air

Increase in the alkalinity of ocean water

سؤال 21

الدرجة 1.00

Which of the following increases the acidity of water in water bodies

Increase in the amount of heat absorbed by water

Rain loaded with carbon dioxide

Increase in the percentage of oxygen in water

Formation of calcium carbonate

سؤال 22

الدرجة 1.00

Calcium bicarbonate is sparsely soluble in water

False

True

سؤال 23

الدرجة 1.00

The factor(s) that affect the rate of dissolution of oxygen and carbon dioxide gases in water is / are ...

Type of water (fresh or salty)

Availability of waves and water turbulence

All of the above

Temperature

سؤال 24

الدرجة 1.00

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