Q1 · hard · AI-verified
Which layer of the Earth's atmosphere causes the water cycle to function by providing energy for evaporation?
- Mesosphere
- Thermosphere
- Troposphere
- Stratosphere
Q2 · medium · AI-verified
In NCERT EVS Class 5, the chapter on water mentions that only a very small fraction of total water on Earth is available as freshwater for human use. What is the APPROXIMATE percentage of freshwater on Earth?
- 1%
- 10%
- 30%
- 3%
Q3 · hard · AI-verified
Which of the following diseases is caused by drinking water contaminated with the bacterium Vibrio cholerae?
- Cholera
- Typhoid
- Malaria
- Dengue
Q4 · hard · AI-verified
The 'Catch the Rain' campaign launched by the National Water Mission of India in 2021 carries the tagline:
- "Every Drop Counts, Harvest Rainwater Today"
- "Catch the Rain, where it falls, when it falls"
- "Save Water, Save Life, Save Earth"
- "Har Ghar Jal, Har Ghar Nal"
Q5 · hard · AI-verified
In the context of NCERT EVS (Class 3–5), 'potable water' means water that is:
- Obtained only from underground sources
- Filtered through sand only
- Free from all dissolved salts
- Safe for drinking