Winds, Storms and Cyclones Notes - Class 7

Class 7: Winds, Storms and Cyclones Notes - Class 7

The document Winds, Storms and Cyclones Notes - Class 7 is a part of Class 7 category.
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 Page 1


Chapter 15 Winds, Storms and Cyclones 
Fill in the blanks. 
1. Moving air is called ____________. 
2. The wing of a flying aircraft experiences a ______. 
3. Air ___________ on heating and contracts on_________. 
4. As the air gets heated up and rises, a region of ____________ pressure is produced. 
5. A low pressure area is created at __________ latitude. 
    
State whether true or false. 
1. Wind can be gentle at times and destructive when it blows strongly. 
2. Pressure is high where the speed is low. 
3. Sun's rays fall straight down on all parts of the Earth. 
4. Maximum wind speeds occur during a thunderstorm. 
5. When a region gets heated up, it develops into a low pressure area. 
 
Name the following. 
1. Moving air 
2. The wind that blows in coastal areas during the day from the oceans to the land. 
3. Wind currents which occur in summer and winter due to the uneven heating of land 
and water. 
4. Rain accompanied by thunder and lightning 
5. The principle which says – the pressure is low where the speed is high.  
 
Answer in one or two sentences. 
1. What is air pressure? 
2. Where are low pressure areas found between the equator and the poles? 
3. How are wind currents formed? 
4. Describe a cyclone. 
5. What are tornadoes?  
 
 
Page 2


Chapter 15 Winds, Storms and Cyclones 
Fill in the blanks. 
1. Moving air is called ____________. 
2. The wing of a flying aircraft experiences a ______. 
3. Air ___________ on heating and contracts on_________. 
4. As the air gets heated up and rises, a region of ____________ pressure is produced. 
5. A low pressure area is created at __________ latitude. 
    
State whether true or false. 
1. Wind can be gentle at times and destructive when it blows strongly. 
2. Pressure is high where the speed is low. 
3. Sun's rays fall straight down on all parts of the Earth. 
4. Maximum wind speeds occur during a thunderstorm. 
5. When a region gets heated up, it develops into a low pressure area. 
 
Name the following. 
1. Moving air 
2. The wind that blows in coastal areas during the day from the oceans to the land. 
3. Wind currents which occur in summer and winter due to the uneven heating of land 
and water. 
4. Rain accompanied by thunder and lightning 
5. The principle which says – the pressure is low where the speed is high.  
 
Answer in one or two sentences. 
1. What is air pressure? 
2. Where are low pressure areas found between the equator and the poles? 
3. How are wind currents formed? 
4. Describe a cyclone. 
5. What are tornadoes?  
 
 
Answer in three or four sentences. 
1. Why is there a difference in temperature between regions?' 
2. What is the difference between a thunderstorm and a cyclone? 
3. What are the effects of a cyclone? 
4. How are wind currents formed? 
5. How are tornadoes formed? 
6. What are the effects of a tornado? 
7. Write 2 points about 
              a. air pressure b. heated air 
    
Answer in five or six sentences. 
1. Explain the formation of winds between the equator and the South Pole. 
2. How does a thunderstorm become a cyclone? 
3. Describe the crushing can experiment. What does it prove? 
4. How will you show that air has pressure? 
5. Explain why roofs are blown away in strong winds. 
6. Write down any 5 precautions we should take during and after a cyclone. 
 
Choose the most appropriate option. 
1. When air moves, it is called 
a. tornado 
b. wind 
c. storm 
d. cyclone 
 
2. When air is heated, it 
a. expands 
b. moves downwards 
c. contracts 
d. exerts pressure 
  
 
Page 3


Chapter 15 Winds, Storms and Cyclones 
Fill in the blanks. 
1. Moving air is called ____________. 
2. The wing of a flying aircraft experiences a ______. 
3. Air ___________ on heating and contracts on_________. 
4. As the air gets heated up and rises, a region of ____________ pressure is produced. 
5. A low pressure area is created at __________ latitude. 
    
State whether true or false. 
1. Wind can be gentle at times and destructive when it blows strongly. 
2. Pressure is high where the speed is low. 
3. Sun's rays fall straight down on all parts of the Earth. 
4. Maximum wind speeds occur during a thunderstorm. 
5. When a region gets heated up, it develops into a low pressure area. 
 
Name the following. 
1. Moving air 
2. The wind that blows in coastal areas during the day from the oceans to the land. 
3. Wind currents which occur in summer and winter due to the uneven heating of land 
and water. 
4. Rain accompanied by thunder and lightning 
5. The principle which says – the pressure is low where the speed is high.  
 
Answer in one or two sentences. 
1. What is air pressure? 
2. Where are low pressure areas found between the equator and the poles? 
3. How are wind currents formed? 
4. Describe a cyclone. 
5. What are tornadoes?  
 
 
Answer in three or four sentences. 
1. Why is there a difference in temperature between regions?' 
2. What is the difference between a thunderstorm and a cyclone? 
3. What are the effects of a cyclone? 
4. How are wind currents formed? 
5. How are tornadoes formed? 
6. What are the effects of a tornado? 
7. Write 2 points about 
              a. air pressure b. heated air 
    
Answer in five or six sentences. 
1. Explain the formation of winds between the equator and the South Pole. 
2. How does a thunderstorm become a cyclone? 
3. Describe the crushing can experiment. What does it prove? 
4. How will you show that air has pressure? 
5. Explain why roofs are blown away in strong winds. 
6. Write down any 5 precautions we should take during and after a cyclone. 
 
Choose the most appropriate option. 
1. When air moves, it is called 
a. tornado 
b. wind 
c. storm 
d. cyclone 
 
2. When air is heated, it 
a. expands 
b. moves downwards 
c. contracts 
d. exerts pressure 
  
 
3. Cyclones develop 
a. over the land and move towards the sea 
b. over the land and move on the land 
c. over the sea and move on the sea 
d. over the sea and move towards land 
  
4. ‘Twister’ is another name for 
a. monsoon 
b. cyclone 
c. tornado 
d. thunderstorm 
  
5. Which one of the following is true? 
a. Pressure is low where the speed is high 
b. Pressure is low where the speed is low 
c. Pressure is high where the speed is high 
d. Pressure does not depend on speed 
  
Correct the following statements. 
1. Air does not exert any pressure on our bodies and so we do not feel it. 
2. Air exerts pressure only in the downward direction. 
3. In a moving fluid, pressure is high where the speed is high. 
4. The areas 30° north and south of the equator become areas of low pressure. 
5. Northeast monsoon brings rain to almost all parts of India. 
  
Choose the correct option. 
1. Revolving high speed winds are also called as (cyclones/earthquakes). 
2. When you ride a bicycle against the wind, you experience (air pressure/cyclones). 
3. When speed is high, air pressure is (low/high). 
4. Heated air moves (up/down). 
5. The air pressure above the Polar Regions is (high/low). 
Answer the following. 
1. Give the reason to why roofs of buildings are often blown up during a storm. 
2. Differentiate between cyclone and tornado. 
 
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