Maharashtra State Board Class 5 EVS Solutions Part 1 Chapter 16 Water
5th Std EVS 1 Digest Chapter 16 Water Textbook Questions and Answers
1. What’s the solution?
Solution & Step-by-Step Answer:
Enough trees must be planted in the garden so that the roots of the trees will make a mesh underground holding the soil firmly, not allowing the soil to get washed away.
2. Use your brain power!
Solution & Step-by-Step Answer:
Use of paver stones to make roads or foot paths is a solution, as the rainwater will then be able to seep through the joints and percolate into the soil, instead of it flowing into the drains and getting wasted.
3. Answer the following questions in brief:
Question (a)
What conditions prevail during a famine?
Answer:
Question (b)
What works are undertaken to make water available even after the rainy season?
Answer:
Severals works are undertaken to make water available even after the rainy season like
1. Large dams are built.
2. Smaller reservoirs are built,
3. Contour bunding and constructing bunds on smaller streams.
Question (c)
Why is it necessary to stop rainwater?
Answer:
1. We get rain for only four months in a year. If rainwater is not stored, we will not have water for our daily needs after the rains.
2. So in order to meet the whole year’s need for water, rainwater must be stopped.
Question (d)
What is meant by water management?
Answer:
Taking steps to ensure that rainwater will be available even in the period after the rainy season is called water management.
4. True or False? Correct the wrong statements:
Question (a)
We get rainwater throughout the year.
Answer:
False. We get rainwater for only four months in a year.
Question (b)
During a famine, the government moves people and animals temporarily to safe places.
Answer:
True.
Environmental Studies Part 1 Standard 5th Solutions Chapter 16 Water Additional Important Questions and Answers
Fill in the blanks with the correct answers from the options given below:
Solution & Step-by-Step Answer:
(a) impure
Solution & Step-by-Step Answer:
(b) float
Solution & Step-by-Step Answer:
(c) harmful
Solution & Step-by-Step Answer:
(c) sources
Solution & Step-by-Step Answer:
(a) convenient
Solution & Step-by-Step Answer:
(b) disease
Solution & Step-by-Step Answer:
(a) poisonous
Solution & Step-by-Step Answer:
(b) polluted
Solution & Step-by-Step Answer:
(c) drinking
Solution & Step-by-Step Answer:
(a) processed
Solution & Step-by-Step Answer:
(b) natural
Solution & Step-by-Step Answer:
(c) purified
Solution & Step-by-Step Answer:
(b) drought
Solution & Step-by-Step Answer:
(a) suffer
Solution & Step-by-Step Answer:
(b) scarce
Solution & Step-by-Step Answer:
(a) hardship
Solution & Step-by-Step Answer:
(c) domestic
Solution & Step-by-Step Answer:
(b) rain
Solution & Step-by-Step Answer:
(c) four
Solution & Step-by-Step Answer:
(a) stored
Solution & Step-by-Step Answer:
(a) percolates
Solution & Step-by-Step Answer:
(b) trees
Solution & Step-by-Step Answer:
(c) tanks
Solution & Step-by-Step Answer:
(c) water
Answer in one sentence:
Solution & Step-by-Step Answer:
The waste water of a city or town is collected and let into a water body at a convenient location.
Solution & Step-by-Step Answer:
Sewage water carries microorganisms that spread diseases.
Solution & Step-by-Step Answer:
Waste water from industries is more likely to contain poisonous substances.
Solution & Step-by-Step Answer:
If this waste water is let into water bodies as it is then the water bodies become polluted and that is dangerous. That is why it is compulsory for factory owners to treat the water before letting it out.
Solution & Step-by-Step Answer:
If large quantities of impurities get mixed with river water, the proportion of oxygen dissolved in the water is reduced and this is a threat to aquatic living things.
Solution & Step-by-Step Answer:
The date of bottling and the period for which the water can be safely used is printed on the bottle. Therefore, it is important to read the information when we buy a bottle of drinking water.
Solution & Step-by-Step Answer:
We must crush and throw the empty drinking water bottles into a bin, so that it cannot be reused.
Solution & Step-by-Step Answer:
A famine is a natural disaster, where the affected area does not receive any rain, so land get dry and there is no water for humans, animals as well as agriculture.
Solution & Step-by-Step Answer:
When it is not possible to build large dams then people and government come together to build smaller reservoirs, contour bunding, constructing bunds on smaller streams or dig wells in river beds to increase the groundwater storage level.
Solution & Step-by-Step Answer:
Rainwater from roof tops is drained into large tanks placed besides the building thus saving rain water.
Answer the following questions in brief:
Solution & Step-by-Step Answer:
1. The government temporarily moves people and animals from famine-stricken areas to safe places where they can be provided with water foodgrain and fodder. 2. Fodder camps are set up to take care of domestic animals.
Solution & Step-by-Step Answer:
1. When the rain water percolates into the soil, the ground water storage level increases. 2. Trees get water. 3. Wells too get enough water and land can be cultivated.
Can you tell?
Question (A)
List the substances that are mixed in the waste water drained out of the kitchen and bathroom in your house.
Answer:
Shampoo, soap, washing detergents, waste food particles, oil and grease from washed utensils, dirt and grime from soiled colthes.
Water Works:
Solution & Step-by-Step Answer:
Rainwater collected in reservoirs and lakes is used for public water supply system. Water from lakes like Tansa, Tulsi and Vihar supply water to Mumbai city.
Solution & Step-by-Step Answer:
Filtration, purification, chlorination
Solution & Step-by-Step Answer:
Settling – Oxygenating – Filtration – Chlorination.
Solution & Step-by-Step Answer:
Alum is used in water to get rid of the bad odour.
Question (B)
If at some place, it did not rain for a very long time, what would be its effect on the life of the people there?
Answer:
Due to scarcity of water there will be drought – like condition.
The people and animals will die of thirst and hunger.
Plants and farms will wither and die therefore no food will be available. This will lead to famine.
Can you recall?
Solution & Step-by-Step Answer:
1. When sugar is added it dissolves in water. 2. When sawdust is added it does not dissolve instead it floats in water. 3. When soil is added the stones simply sink to the bottom of the glass and the soil dissolves the water making it muddy.
Solution & Step-by-Step Answer:
1. Liquid state 2. Solid-state 3. Gaseous state.
Solution & Step-by-Step Answer:
At homes, the tap water is filtered and boiled to purify it for drinking.
Glossary: