Understanding Winds, Storms and Cyclones - Grade 7 Worksheet

Understanding Winds, Storms and Cyclones - Grade 7 Worksheet
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Learning about winds, storms and cyclones is an important part of understanding the science of climate and weather. This Grade 7 worksheet covers the fundamentals of these natural phenomena, giving students a better understanding of how they work and how to identify them. Use this as a helpful resource to expand your knowledge and ace your quizzes!

Click here to download wind, Storms and Cyclones Notes, Mindmap, Extra Questions and Answer including MCQs

What is wind?

Wind is the movement of air caused by air pressure differences in the atmosphere. Air moves from areas of higher pressure to areas of lower pressure, creating winds of different speeds and directions. Wind is used as a source of power to run wind turbines and pumps and helps to distribute heat around the world, creating global weather patterns.

What are the different types of winds?

Depending on their intensity and speed, winds are classified into three main categories—gentle breezes, strong gusts and powerful storms. Gentle breeze winds can be warm or cool and blow from areas of high pressure to areas of low pressure. Strong gusts are caused by thunderstorms or squall lines, which can cause wind speeds as fast as 58 miles per hour. Powerful storms such as tornadoes, hurricanes and tropical cyclones involve winds that reach above 200 mph in some cases.

Explain the difference between air pressure and wind force.

Air pressure is the force exerted on a given area by the weight of the air molecules above it. Wind force is the movement of air, caused by differences in air pressure. High pressure areas have lighter winds, while low pressure areas have stronger winds because air from high to low pressure moves in an attempt to equalize the pressures.

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Winds storms and cyclones class 7 Questions and answers

  1. What is the difference between wind and storm?

Answer: Wind is the movement of air from high pressure to low pressure areas, while storm is a severe weather condition characterized by strong winds, heavy rain, and lightning.

  1. What are the different types of winds?

Answer: The different types of winds are trade winds, westerlies, and easterlies.

  1. What is a cyclone?

Answer: A cyclone is a type of storm that forms over warm ocean waters and is characterized by strong winds, heavy rain, and storm surges.

  1. What is the eye of a cyclone?

Answer: The eye of a cyclone is the calm center of the storm, surrounded by the most severe winds and rain.

  1. What is the difference between a cyclone and a tornado?

Answer: A cyclone is a large storm system that forms over warm ocean waters, while a tornado is a smaller, more localized storm that forms over land.

  1. How do cyclones form?

Answer: Cyclones form over warm ocean waters when the air above the water becomes warm and moist, and starts to rise. As the air rises, it cools and condenses, forming clouds and releasing heat. This heat causes more air to rise, creating a cycle of rising warm air and falling cool air that can lead to the formation of a cyclone.

  1. What is the Saffir-Simpson scale?

Answer: The Saffir-Simpson scale is a scale used to classify hurricanes and cyclones based on their wind speed and potential for damage.

  1. What are some safety measures to take during a cyclone?

Answer: Some safety measures to take during a cyclone include staying indoors, away from windows and doors, securing loose objects, and following instructions from local authorities.

  1. True or False: A tornado is a type of cyclone.

Answer: True.

  1. What is the difference between a thunderstorm and a cyclone?

Answer: A thunderstorm is a localized storm that is usually less severe than a cyclone, while a cyclone is a large, more intense storm system that can cover a much larger area and cause more widespread damage.

Answer key:

  1. Wind is the movement of air from high pressure to low pressure areas, while storm is a severe weather condition characterized by strong winds, heavy rain, and lightning.
  2. The different types of winds are trade winds, westerlies, and easterlies.
  3. A cyclone is a type of storm that forms over warm ocean waters and is characterized by strong winds, heavy rain, and storm surges.
  4. The eye of a cyclone is the calm center of the storm, surrounded by the most severe winds and rain.
  5. A cyclone is a large storm system that forms over warm ocean waters, while a tornado is a smaller, more localized storm that forms over land.
  6. Cyclones form over warm ocean waters when the air above the water becomes warm and moist, and starts to rise.
  7. The Saffir-Simpson scale is a scale used to classify hurricanes and cyclones based on their wind speed and potential for damage.
  8. Some safety measures to take during a cyclone include staying indoors, away from windows and doors, securing loose objects, and following instructions from local authorities.
  9. True.
  10. A thunderstorm is a localized storm that is usually less severe than a cyclone, while a cyclone is a large, more intense storm system that can cover a much larger area and cause more widespread damage.

winds storms and cyclones class 7 extra questions with answers

  1. What are the three main types of storms?

Answer: The three main types of storms are thunderstorms, hurricanes, and tornadoes.

  1. How does the Coriolis effect influence wind patterns?

Answer: The Coriolis effect is caused by the rotation of the Earth and causes winds to deflect to the right in the Northern Hemisphere and to the left in the Southern Hemisphere.

  1. What is the difference between a tropical cyclone and a temperate cyclone?

Answer: A tropical cyclone forms in warm, tropical waters, while a temperate cyclone forms in the mid-latitude regions and is often associated with cold fronts.

  1. What is a thunderstorm and how does it form?

Answer: A thunderstorm is a storm characterized by lightning, thunder, and heavy rain. It forms when warm, moist air rises and cools, creating a cycle of rising and falling air.

  1. What is the difference between a hurricane and a typhoon?

Answer: A hurricane and a typhoon are both types of tropical cyclones, but they are called by different names depending on where they occur. Hurricanes occur in the Atlantic and Northeast Pacific, while typhoons occur in the Northwest Pacific.

  1. What is the difference between a watch and a warning in relation to severe weather?

Answer: A watch means that conditions are favorable for the development of severe weather, while a warning means that severe weather is imminent or already occurring.

  1. What is a storm surge and how can it be dangerous?

Answer: A storm surge is a rise in sea level caused by the winds and pressure changes of a storm. It can be dangerous because it can cause flooding and damage to coastal areas.

  1. How do tornadoes form?

Answer: Tornadoes form when warm, moist air meets cool, dry air and creates a rotating column of air that extends from the cloud to the ground.

  1. How can you stay safe during a thunderstorm?

Answer: You can stay safe during a thunderstorm by avoiding open areas, staying away from tall objects, and staying indoors if possible.

  1. What is a derecho and how does it differ from a typical thunderstorm?

Answer: A derecho is a widespread and long-lived windstorm that is associated with a line of severe thunderstorms. It differs from a typical thunderstorm in that it can cause straight-line winds instead of rotating winds like a tornado.

Answer key:

  1. The three main types of storms are thunderstorms, hurricanes, and tornadoes.
  2. The Coriolis effect causes winds to deflect to the right in the Northern Hemisphere and to the left in the Southern Hemisphere.
  3. A tropical cyclone forms in warm, tropical waters, while a temperate cyclone forms in the mid-latitude regions and is often associated with cold fronts.
  4. A thunderstorm forms when warm, moist air rises and cools, creating a cycle of rising and falling air.
  5. A hurricane and a typhoon are both types of tropical cyclones, but they are called by different names depending on where they occur.
  6. A watch means that conditions are favorable for the development of severe weather, while a warning means that severe weather is imminent or already occurring.
  7. A storm surge is a rise in sea level caused by the winds and pressure changes of a storm. It can be dangerous because it can cause flooding and damage to coastal areas.
  8. Tornadoes form when warm, moist air meets cool, dry air and creates a rotating column of air that extends from the cloud to the ground.
  9. You can stay safe during a thunderstorm by avoiding open areas, staying away from tall objects, and staying indoors if possible


FAQs


Q: What are winds, storms, and cyclones?

A: Winds are the movement of air from high pressure to low pressure areas. Storms are violent disturbances in the atmosphere that produce strong winds, heavy precipitation, and sometimes lightning and thunder. Cyclones are rotating weather systems characterized by low pressure at the center and high winds.

Q: What causes winds?

A: Winds are caused by differences in air pressure. Air moves from high pressure areas to low pressure areas, creating wind.

Q: What is the Coriolis effect?

A: The Coriolis effect is the apparent deflection of moving objects, such as wind and ocean currents, due to the rotation of the Earth.

Q: What causes thunderstorms?

A: Thunderstorms are caused by the upward movement of warm, moist air, which condenses into clouds and produces thunder, lightning, and precipitation.

Q: What is a tropical cyclone?

A: A tropical cyclone is a rotating storm system characterized by low pressure at the center and high winds. It forms in warm, tropical waters and can bring heavy rain and flooding.

Q: What is a tornado?

A: A tornado is a rotating column of air that extends from a thunderstorm cloud to the ground. It is characterized by high winds and can cause significant damage.

Q: What is a storm surge?

A: A storm surge is a rise in sea level caused by the winds and pressure changes of a storm. It can cause flooding and damage to coastal areas.

Q: How can I stay safe during a severe weather event?

A: To stay safe during a severe weather event, it is important to stay informed about weather conditions, seek shelter in a sturdy building, avoid windows and tall objects, and stay away from water and flooded areas.

Q: How can we prepare for severe weather events?

A: We can prepare for severe weather events by having an emergency kit with essential supplies, creating a family emergency plan, and staying informed about weather conditions and evacuation orders.

Q: What is the difference between a watch and a warning?

A: A watch means that conditions are favorable for the development of severe weather, while a warning means that severe weather is imminent or already occurring.

Q: How can we mitigate the impact of severe weather events?

A: We can mitigate the impact of severe weather events by taking steps to reduce greenhouse gas emissions and slow climate change, improving infrastructure to withstand extreme weather events, and implementing effective disaster response and recovery plans.

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