Oxygen and carbon dioxide in the Aquatic

Concentration of oxygen .gas is500 times less than carbon dioxide in air

• False

• True

By decreasing the temperature the solubility of gases increases

• True

• False

The solubility of gases in fresh water higher than in salt water

• True

• False

Increase of oxygen percentage in water leads to

• Improve metabolism

• Reduce calcification

From sources of oxygen in water …

• Metabolism

• Photosynthesis

• Acidification

the main source of oxygen and carbon dioxide in water is …..

• Hydrosphere

• Atmosphere

• Biosphere

Decomposition of organic matter produces……

• Oxygen

• Carbon dioxide

• Carbonic acid

Affect on food chain one of the results of ….

• carbon dioxide increasing

• Carbon dioxide decreasing

• Oxygen increasing

mollusks, and some species of plankton depend on ……. To form their shells or skeletons.

• Calcium carbonate

• sodium carbonate

• Calcium bicarbonate

Hard substance don’t soluble in water form shell fish

• Carbonic acid

• Calcium carbonate