MEDIUM
7th CBSE
IMPORTANT
Earn 100

What are the harmful effects of untreated sewage?

Important Questions on Waste Water Story

HARD
7th CBSE
IMPORTANT
Science Booster>Chapter 19 - Waste Water Story>PRACTICE TIME>Q F
Describe what happens when water is allowed to pass into sedimentation tank in waterworks.
HARD
7th CBSE
IMPORTANT
Science Booster>Chapter 19 - Waste Water Story>PRACTICE TIME>Q F
What is a septic system? How does it work?
MEDIUM
7th CBSE
IMPORTANT
Science Booster>Chapter 19 - Waste Water Story>PRACTICE TIME>Q F
What are the natural ways of sewage treatment?
MEDIUM
7th CBSE
IMPORTANT
Science Booster>Chapter 19 - Waste Water Story>PRACTICE TIME>Q G
Anu has the habit of overwatering the plants in her lawn. Do you think it can lead to contamination of groundwater? How?
MEDIUM
7th CBSE
IMPORTANT
Science Booster>Chapter 19 - Waste Water Story>PRACTICE TIME>Q G
Microorganisms are present in the waste materials. Do you think they help in the treatment of sewage?
HARD
7th CBSE
IMPORTANT
Science Booster>Chapter 19 - Waste Water Story>Creative Corner>Q H

Science Quiz / Puzzle

Complete the following crossword with the help of given clues:

Across

1. A waterborne disease.

3. Water containing waste.

5. Bacteria which do not require oxygen for their survival.

7. Bacteria which require oxygen for survival.

Down

2. Water fit for drinking.

4. A gas formed during wastewater treatment and used as a fuel.

6. A gas used to disinfect water.

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