These Class 8 Science Curiosity Worksheet and Class 8 Science Chapter 6 Pressure, Winds, Storms, and Cyclones Worksheet with Answers are excellent for board exam practice.
Class 8 Science Chapter 6 Pressure, Winds, Storms, and Cyclones Worksheet
Class 8 Pressure, Winds, Storms, and Cyclones Worksheet
Worksheet On Pressure, Winds, Storms, and Cyclones Class 8 – Pressure, Winds, Storms, and Cyclones Worksheet Class 8
Let’s Begin
A. Multiple-Choice Questions
Question 1.
Why does a bag with broad straps feel more comfortable?
(a) It is lighter in weight.
(b) It does not press on the shoulders.
(c) it spreads the weight over a larger are(a)
(d) It is made of soft material.
Question 2.
A pressure of 200 Pa is applied on a surface of area 4 m2. What is the total force applied?
(a) 800 N
(b) 50 N
(c) 150 N
(d) 400 N
Question 3.
Why can the roofs of houses be blown away during high-speed winds?
(a) Because the wind pushes directly on the roof.
(b) Because the pressure below the roof is higher than above.
(c) Because the pressure above the roof is higher than below.
(d) Because the wind carries heat that loosens the roof.
Question 4.
This question consists of an Assertion (A) and a Reason (R). Read the Assertion and Reason and choose the appropriate answer.
Assertion (A): Air pressure in inflated balloon is higher than the uninflated balloon. Reason (R): Air moves from a region of high air pressure to low air pressure.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.
Question 5.
This question consists of an Assertion (A) and a Reason (R). Read the Assertion and Reason and choose the appropriate answer.
Assertion (A): It feels easier to lift a water-filled bucket with a broad handle than with a narrow handle.
Reason (R): A broad handle increases the area over which the force acts, thereby increasing the pressure on the han(d)
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.
B. State True (T) or False (F).
1. The pressure inside the body is mainly caused by the presence’of bones.
2. SI unit of force is pascal (Pa).
3. Liquid exerts pressure in all directions.
4. Land breeze and sea breeze occurs due to the pressure difference over the land and the se(a)
5. Heavier water droplets in a cloud carry a positive charge.
C. Fill in the blanks.
1. We feel the weight of a bag when we carry it because of the force of ______________ acting on our shoulders.
2. 1 hectopascal (hPa) is equal to ______________ P(a)
3. The spinning system of clouds, winds, and rain is known as ______________.
4. A storm accompanied by lightning and thunder is known as ______________.
5. A lightning conductor is a ______________ fixed on buildings to protect them from lightning.
D. Assign one word to the following terms.
1. An envelope of air that surrounds the Earth. ______________
2. The SI unit of pressure. ______________
3. The region at the centre of a cyclone having lowest pressure. ______________
4. A sudden flow of electric charges, producing bright flash of light. ______________
5. Force acting on a unit are(a) ______________
E. Match the Columns.
Question 1.
Match the terms given in Column I with their correct descriptions given in Column II.
| Column I | Column II |
| (i) Amphan cyclone | (a) Causes land and sea breeze |
| (ii) India Meteorological Department (IMD) | (b) Can cause fires, damage buildings, and severe burns |
| (iii) Lightning conductor | (c) Wind speed of 270 km/h |
| (iv) Uneven heating of land and sea | (d) Transfer of electric charges through metal rod into the ground |
| (v) Lightning | (e) Monitors cyclones and thunderstorms in India. |
Question 2.
Unjumble the words given in Column II and write them in the sp_(a)ce provided with the help of the images given in Column I. Then match the-images with the correct terms.
Wonder Why
A. Give reasons for the following.
1. A porter wears a turban while carrying a loa(d)
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2. Water tanks are placed on the rooftops of houses.
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3. The nature of lightning would have changed if air acts as a good conductor of electricity.
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4. The base of a dam is much broader than the top.
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5. A sea breeze blows from the sea towards the land during the day.
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6. Seawater contamination affects drinking water sources.
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B. Read the paragraph and answer the following questions.
Rina conducted an experiment in her science class using two pipes—one wide and one narrow. She tied a balloon at the bottom of each pipe and filled both pipes with water up to the same height. After a while, she observed that both balloons bulged equally, pipe even though the amount of water in each pipe was different. This made her curious about what actually caused the balloons to bulge the same way.
Question 1.
What did Rina observe in both the balloons during experiment?
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Question 2.
Why do you think the balloons bulged equally even though the pipes had different amounts of water?
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Question 3.
Does the bulging of the balloon depend on the diameter of the pipe?
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Question 4.
What does this experiment suggest about the relationship between the height of a water column and the pressure it exerts?
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C. In figures (a) and (b), on which surface will the rubber sucker stick better, and why?
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D. Why do parachutes have a small hole at the top?
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E. Perform the activities given below in the table and fill the last column with conclusions based on your observations. Also, give reasons for the conclusions. Explore/Question/Reason
Activity Modes of action Easy or difficult to perform? Give reasons
Learn By Doing
A. Air is present all around us and exerts pressure on everything. Though we cannot see it, its effects can be felt. The pressure applied by air changes depending on the area it acts upon, Which can affect the effort needed to move or lift objects. Experiment/Observe/Interpret
Question 1.
What did you observe when you lifted the paper plate covered with folded chart paper?
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Question 2.
Did the weight of the chart paper change when it was unfolded?
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Question 3.
What does this experiment show about the pressure exerted by air?
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B. Aanya explained to her friend that liquid exerts pressure on the sides of the container.
First, she tied a balloon to the bottom of a bottle and filled it with water. As the water level increased, the balloon bulged. Then, she took another plastic bottle and made three holes at the same height near the bottom.
Water flowed out evenly from all the holes.
Now, answer the following questions based on her experiment.
Question 1.
What is Aanya trying to explain to her friend?
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Question 2.
What does the bulged balloon indicates?
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Question 3.
Why does water spurt out from leaking holes in water bottle?
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Question 4.
Fill the table below.
| Experiment | Observation | Conclusion |
| Balloon bulges | ||
| Holes made at same height on bottle |
Explore With Curiosity
A. During a lightning storm, some actions can keep us safe, while others can increase the risk of getting struck. Read the list of actions below and classify each one as Safe or Unsafe. Also, explain why each action is safe or unsafe.
| Actions | Safe/Unsafe | Why? |
| Standing under a tall tree | ||
| Getting out of a swimming pool | ||
| Using an umbrella with a metal rod | ||
| Sitting inside a closed car or bus | ||
| Lying flat on the ground | ||
| Crouching in a low- lying open area |
B. Two boats, A and B are floating on water. Boat A is carrying 5 people arid has a base area of 7 m2, while Boat B is carrying 3 people and has a basejarea of 3.5 m2. Each person weighs 700 N. Use the given data to calculate total force and pressure exerted by each boat.
| Boat | Total Force (N) | Pressure (N/m2) |
| A | ||
| B |
Also, the difference in pressure is ______________ N/m2.
C. Observe the image and answer the following questions.
Question 1.
Which type of breeze is blowing?
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Question 2.
Why does this type of breeze occur at night?
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Question 3.
At night, which is warmer-the land or the sea?
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Word Puzzle
Complete the crossword with the help of the given clues.
DOWN
1. Loud sound after lightning
2. Local name of thunderstorm in Kerala
3. Sudden flow of charge producing a bright flash of light
4. Strong wind accompanied by rain
7. Breeze that blows from land to sea during night
ACROSS
5. Envelope of air surrounding the Earth
6. Large storms form over warm ocean water
8. Movement of air from one place to another
Suggested Activities
A. Make a poster on five major cyclones that hit India in the last five years. Paste a map of India on chart paper and mark the affected locations. Below the map, draw a table with columns for cyclone name, year, states affected, destruction caused, and number of deaths. Circle the most dangerous cyclone in the table and write a short note on the reason for its high intensity. Include the government measures taken to reduce damage and provide relief to people. Decorate the poster neatly so that it is clear, attractive, and easy to rea(d)
B. Take three transparent plastic pipes of different lengths and tie a rubber balloon tightly at the bottom of each pipe so there is no leakage. Fix the pipes upright with the help of a stan(d) Using a funnel, pour water into the first pipe and watch how much the balloon at the bottom bulges. Then repeat the same with the second and third pipes, adding more water each time so that the water level is higher. Record your observations and describe the concept on which this activity is based on.
C. Take a hair dryer and turn it on to blow cool air in an upward direction. Hold it steadily so that the stream of air rises straight.
Now, carefully place a ping-pong ball above the stream of air and let it go gently. Predict what you think will happen to the ball when it is placed in the moving air. Perform the activity and carefully observe what happens. Record your observations and explain the reason behind what you saw.