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Water, Air and Pollution
Environmental Studies
Useful for: CTET, OTET, REET, UPTET, Bihar TET / CTET Route, Junior Teacher, MP Teacher — Primary / Varg 3, OSEPA Primary Teacher / JT Category-I and 1 more exams
Overview
Water and air are vital resources; EVS teaches their sources, uses, conservation and protection from pollution.
Key points
- Rain is the main source of fresh water; rivers, lakes, wells and groundwater store it.
- The water cycle: evaporation, condensation, precipitation.
- Rainwater harvesting and reuse conserve water.
- Polluted water causes diseases such as cholera and typhoid.
- Air pollution comes from vehicles, factories, burning and dust.
- Clean water and air are essential for health.
Explanation
- Traditional systems (stepwells, johads) show local wisdom.
- Simple filters show how water is cleaned.
- Trees reduce air pollution.
- Children can audit water use at school.
- Boiling water kills germs.
Step by step
- Identify the concept, law or fact asked.
- Recall the definition, formula, example or year.
- Apply it and eliminate mismatched options.
Examples
- Children track how much water their family uses in a day → conservation awareness.
- A rooftop collecting rainwater into a tank → harvesting.
- Burning leaves causing smoke → air pollution.
Traps and advanced points
- Trap: Saying groundwater is unlimited.
- Trap: Ignoring health links.
- Trap: Only facts without action.
Quick revision
- Water cycle.
- Rainwater harvesting.
- Pollution sources and health.
Practice MCQs
At sea level, water boils at —
- 0 °C
- 50 °C
- 100 °C
- 200 °C
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Answer: (c) 100 °C. Boiling point of water is 100 °C at sea level.
Which water contains the most dissolved salts?
- rainwater
- river water
- sea water
- well water
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Answer: (c) sea water. Sea water has about 3.5% dissolved salts.
Which statement about Water and Conservation is NOT appropriate?
- Water conservation combines careful use, protection of sources and reduction of avoidable loss.
- Compare household water uses and plan practical ways to reduce wastage.
- Clean water is an unlimited resource that never requires conservation.
- Water and Conservation should be interpreted according to its purpose and context.
Read chapter notes · Similar questions
Show answer
Answer: (c) Clean water is an unlimited resource that never requires conservation.. The NOT-appropriate statement is: Clean water is an unlimited resource that never requires conservation.
During a field investigation on Water and Conservation, students compare repeated observations. Choose the most defensible exam-ready conclusion about Water and Conservation.
- Clean water is an unlimited resource that never requires conservation.
- Water and Conservation is useful only for record keeping and has no effect on learning.
- Water and Conservation should be applied identically in every situation without checking learner needs.
- Water conservation combines careful use, protection of sources and reduction of avoidable loss.
Read chapter notes · Similar questions
Show answer
Answer: (d) Water conservation combines careful use, protection of sources and reduction of avoidable loss.. Water conservation combines careful use, protection of sources and reduction of avoidable loss.
During a field investigation on Water and Conservation, students compare repeated observations. A teacher wants to apply Water and Conservation correctly. Which action is most appropriate?
- Clean water is an unlimited resource that never requires conservation.
- Compare household water uses and plan practical ways to reduce wastage.
- Water and Conservation is useful only for record keeping and has no effect on learning.
- Water and Conservation should be applied identically in every situation without checking learner needs.
Read chapter notes · Similar questions
Show answer
Answer: (b) Compare household water uses and plan practical ways to reduce wastage.. Water conservation combines careful use, protection of sources and reduction of avoidable loss.
Choose the most defensible exam-ready conclusion about Water and Conservation.
- Clean water is an unlimited resource that never requires conservation.
- Water and Conservation is useful only for record keeping and has no effect on learning.
- Water and Conservation should be applied identically in every situation without checking learner needs.
- Water conservation combines careful use, protection of sources and reduction of avoidable loss.
Read chapter notes · Similar questions
Show answer
Answer: (d) Water conservation combines careful use, protection of sources and reduction of avoidable loss.. Choose the most defensible exam-ready conclusion about Water and Conservation.: Water conservation combines careful use, protection of sources and reduction of avoidable loss.
A teacher wants to apply Water and Conservation correctly. Which action is most appropriate?
- Clean water is an unlimited resource that never requires conservation.
- Compare household water uses and plan practical ways to reduce wastage.
- Water and Conservation is useful only for record keeping and has no effect on learning.
- Water and Conservation should be applied identically in every situation without checking learner needs.
Read chapter notes · Similar questions
Show answer
Answer: (b) Compare household water uses and plan practical ways to reduce wastage.. Water conservation combines careful use, protection of sources and reduction of avoidable loss.
During a laboratory exercise on Water and Conservation, students compare repeated observations. A teacher wants to apply Water and Conservation correctly. Which action is most appropriate?
- Clean water is an unlimited resource that never requires conservation.
- Compare household water uses and plan practical ways to reduce wastage.
- Water and Conservation is useful only for record keeping and has no effect on learning.
- Water and Conservation should be applied identically in every situation without checking learner needs.
Read chapter notes · Similar questions
Show answer
Answer: (b) Compare household water uses and plan practical ways to reduce wastage.. Water conservation combines careful use, protection of sources and reduction of avoidable loss.
During a laboratory exercise on Water and Conservation, students compare repeated observations. which statement about Water and Conservation is NOT appropriate?
- Water conservation combines careful use, protection of sources and reduction of avoidable loss.
- Compare household water uses and plan practical ways to reduce wastage.
- Clean water is an unlimited resource that never requires conservation.
- Water and Conservation should be interpreted according to its purpose and context.
Read chapter notes · Similar questions
Show answer
Answer: (c) Clean water is an unlimited resource that never requires conservation.. The NOT-appropriate statement is: Clean water is an unlimited resource that never requires conservation.
During a laboratory exercise on Water and Conservation, students compare repeated observations. Choose the most defensible exam-ready conclusion about Water and Conservation.
- Clean water is an unlimited resource that never requires conservation.
- Water and Conservation is useful only for record keeping and has no effect on learning.
- Water and Conservation should be applied identically in every situation without checking learner needs.
- Water conservation combines careful use, protection of sources and reduction of avoidable loss.
Read chapter notes · Similar questions
Show answer
Answer: (d) Water conservation combines careful use, protection of sources and reduction of avoidable loss.. Water conservation combines careful use, protection of sources and reduction of avoidable loss.
During a field investigation on Water and Conservation, students compare repeated observations. which statement about Water and Conservation is NOT appropriate?
- Water conservation combines careful use, protection of sources and reduction of avoidable loss.
- Compare household water uses and plan practical ways to reduce wastage.
- Clean water is an unlimited resource that never requires conservation.
- Water and Conservation should be interpreted according to its purpose and context.
Read chapter notes · Similar questions
Show answer
Answer: (c) Clean water is an unlimited resource that never requires conservation.. The NOT-appropriate statement is: Clean water is an unlimited resource that never requires conservation.
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Notes and questions are written by Kundali IQ for practice. They are not official papers; always check the latest official notification for the syllabus and pattern.