Natural Disaster - Chapter 23 | Class 4 - Science Solutions

Natural Disaster – Chapter 23 | Class 4 – Science Solutions | Maharashtra State Board

(A): What’s the Solution ?

Your village is uphill. There is a flood in a neighbouring village.
Ans:

Our village is on a hill, so we are safe from the flood, but the nearby village is in trouble.
We can help by sending them food, clean water, and clothes.
Our parents can call for rescue teams to help the people there.
If needed, we can offer shelter to our friends from the flooded village.
It’s important to stay safe and listen to adults about what to do.
Let’s hope and pray for their safety.

Natural Disaster – Chapter 23 | Class 4 – Science Solutions | Maharashtra State Board

(B) Use your brain power !

1. A table for natural disasters and man-made disasters is given below. Complete the table with the help of the list that follows.

(1) Cyclone
(2) Collapse of an old ramshackle house
(3) Death due to lightning
(4) Collision of two railway trains
(5) Children on a playground getting injured when a termite ridden tree falls
(6) Normal life getting disturbed due to heavy snowfall
(7) A fire caused by the explosion of a cooking gas cylinder
(8) An air crash due to a mechanical fault.

Answer :

No.	Natural Disasters	No.	Man-made Disasters
1.	Cyclone	1.	Collapse of an old ramshackle house
2.	Death due to lightning	2.	Collision of two railway trains
3.	Children on a playground getting injured when a termite ridden tree falls	3.	A fire caused by the explosion of a cooking gas cylinder
4.	Normal life getting disturbed due to heavy snowfall	4.	An air crash due to a mechanical fault.

–> Natural Disaster – Chapter 23 | Class 4 – Science Solutions | Maharashtra State Board

Q. 2: What is the difference between a hailstorm and snowfall?

Difference Between a Hailstorm and Snowfall

Hailstorm	Snowfall
1. Hailstones are hard, round balls of ice.	1. Snowflakes are soft, fluffy ice crystals.
2. Hail forms during thunderstorms in warm weather.	2. Snow forms in cold weather when the temperature is below freezing.
3. Hailstones can be very large and cause damage to property and crops.	3. Snow usually falls gently and covers the ground with a white blanket.
4. Hailstones form in strong updrafts within storm clouds.	4. Snowflakes form when water vapor freezes in the atmosphere.

Q. 3: If there are animals with fur coats living in places where it snows, would the coat be thick or thin? What could be the reason for that?
Answer:
⧫ If animals live in places where it snows, their fur coats would be thick. This thick fur helps keep them warm in the cold weather.
⧫ The fur acts like a warm blanket, trapping heat close to their bodies. Without thick fur, they would feel very cold and could get sick.
⧫ So, animals have thick fur to stay cozy and survive in snowy places.

(D) Answer the following questions.

Q.1. : What kind of rain in winter is good for the crops?
Answer:
￫ In winter, occasional and light rain is good for the crops.
￫ This type of rain soaks into the ground slowly, providing the plants with the water they need without washing away the soil or harming the plants.
￫ This type of rain helps the roots grow strong and healthy, which is important for good crop growth.

Q.2: What are the ill effects of a hailstorm?
Answer:
￫ Hailstorms can cause a lot of damage.
￫ The hard, ice balls can break windows and dent cars.
￫ They can also damage crops and hurt animals and people if they get hit.
￫ Hailstorms make it dangerous to be outside.

Q.3: Should one go for a swim in flood waters?
Answer:
￫ No one should not go for a swim in flood waters.
￫ Flood waters can be very dangerous because they are often dirty and fast-moving.
￫ There can also be hidden debris and strong currents that can hurt or trap you.
￫ It’s safer to stay away from flood waters.

Q.4: How does a tsunami affect vehicles on the coast?
Answer:
￫ A tsunami can push vehicles on the coast away with its powerful waves.
￫ The strong water can lift cars and trucks, move them far away, or even damage them badly.
￫ It’s very dangerous for vehicles and everything else near the shore.

(E) Fill in the blanks.

1) Waves just like the ones we see in water, are produced in the bowels of the earth.

2) If it does not stop raining, the rainwater enters the settlements.

3) People and animals are helpless against the force of a tsunami.

4) People get trapped under the heaps and die.

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Natural Disaster – Chapter 23 | Class 4 – Science Solutions | EVS – I