4.4- Water pollution

Water-quality tests on rivers include biochemical oxygen demand (BOD), chemical oxygen demand (COD), ammonia, dissolved oxygen, and one more type name it

What is the symbol for milligrams per decimetre cubed?

• mg dm–3.

• mg dm.

• mg dm-2

The method of the test kit, meter, or sensor; oxygen usually measured as percentage saturation; follow instructions to measure oxygen saturation is the method for measuring what?

Is it true that the abiotic index indirectly measures pollution by assaying the impact on species in the community according to their tolerance, diversity, and relative abundance? True or False

• True

• False

It can occur when lakes, estuaries, and coastal waters receive inputs of nutrients (nitrates and phosphates) which result in excess growth of plants and phytoplankton. name the process

The measure of the amount of dissolved oxygen required to break down the organic material in each volume of water is called as Biochemical oxygen demand

Some species can be indicative of polluted waters and are used to call as

• Indicator species.

• Sub Species

• Indicator

The indirectly measures pollution by assaying the impact on species in the community according to their tolerance, diversity, and relative abundance is called as

Method: Test kit, meter, or sensor; oxygen usually measured as percentage saturation: follow instructions to measure oxygen saturation.

What is the indicator for this test method?

• Dissolved oxygen

• Phosphate

• Nitrate

• Ammonia

Method: Indicator paper dipped in the sample and compared to a color chart; record the pH number. What is the indicator for this test method?

• Dissolved oxygen

• Phosphate

• Nitrate

• pH