# Science Chapter 7 Lesson 3 Tracking The Weather

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Tracking the Weather

• 1.

### Thunder occurs when what happens?

• A.

Air masses collide

• B.

Lightning heats air quickly

• C.

Warm air hits the ground

• D.

A warm front forms

B. Lightning heats air quickly
Explanation
Thunder occurs when lightning heats the air quickly. When a lightning bolt travels through the air, it rapidly heats the surrounding air to temperatures of up to 30,000 kelvins (53,540 degrees Fahrenheit). This sudden increase in temperature causes the air to expand rapidly, creating a shock wave that we perceive as thunder. The intensity and duration of thunder can vary depending on factors such as the distance from the lightning strike and atmospheric conditions.

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• 2.

### When does a cold front form?

• A.

When a cold air mass pushes under a warm air mass

• B.

When a warm air mass pushes under a cold air mass

• C.

When two cold air masses collide

• D.

When the boundary between two air masses stops moving

A. When a cold air mass pushes under a warm air mass
Explanation
A cold front forms when a cold air mass pushes under a warm air mass. This occurs because cold air is denser than warm air, causing it to sink and push the warm air upward. As the cold air moves in, it displaces the warm air and creates a boundary between the two air masses. This boundary is known as a cold front and is often associated with stormy weather conditions such as thunderstorms and heavy rain.

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• 3.

### Where does a hurricane form?

• A.

Over dry land

• B.

Over cold ocean waters

• C.

Over warm lakes and streams

• D.

Over warm ocean waters

D. Over warm ocean waters
Explanation
Hurricanes form over warm ocean waters because the warm water provides the necessary heat and moisture for the storm to develop and intensify. As the warm air rises from the ocean surface, it creates low pressure and draws in more moist air, causing the formation of thunderstorms. These thunderstorms then organize into a rotating system, known as a tropical cyclone, which can develop into a hurricane. The warm ocean waters fuel the hurricane's energy and allow it to grow in size and strength.

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• 4.

### What do you call the boundary between two air masses?

• A.

Front

• B.

Hurricane

• C.

Thunderstorm

• D.

A. Front
Explanation
A front is the boundary between two air masses with different characteristics, such as temperature or humidity. It is where these air masses meet and interact, leading to changes in weather conditions. Fronts can be associated with various weather phenomena, such as rain, snow, or thunderstorms. A hurricane, thunderstorm, and tornado are all types of severe weather events that can occur within or near a front, but they are not the boundary itself.

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• 5.

### What kind of front is fast-moving and brings stormy weather?

• A.

Cold

• B.

Thunderstorm

• C.

• D.

Warm

A. Cold
Explanation
A fast-moving front that brings stormy weather is typically a cold front. Cold fronts occur when a cold air mass pushes into a region, displacing the warmer air ahead of it. As the cold air mass moves quickly, it can create instability in the atmosphere, leading to the formation of thunderstorms and other stormy weather conditions. Therefore, the correct answer is cold.

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• 6.

### What do you call a large region of air with nearly the same temperature and water vapor throughout it?

• A.

Front

• B.

Hurricane

• C.

Air mass

• D.

C. Air mass
Explanation
An air mass refers to a large region of air that has a consistent temperature and water vapor content throughout it. Unlike a front, which is a boundary between two air masses with different properties, an air mass itself is characterized by uniform conditions. A hurricane and tornado, on the other hand, are specific types of weather phenomena that are associated with strong winds and severe weather conditions, but they do not necessarily represent a large region of air with consistent properties.

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• 7.

### What kind of front is formed when warm air pushes under cold air and brings light, steady rain?

• A.

Cold front

• B.

Hurricane

• C.

• D.

Warm front

D. Warm front
Explanation
A warm front is formed when warm air pushes under cold air and brings light, steady rain. As the warm air rises and cools, it condenses into clouds and precipitation, resulting in the steady rain. The warm air mass gradually replaces the cold air mass, leading to a gradual increase in temperature. This type of front typically brings more gentle weather compared to a cold front, which often brings more intense storms.

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• 8.

### What kind of very wide storm form over the ocean but can also cause severe damage on land?

• A.

Front

• B.

Hurricane

• C.

Thunderstorm

• D.

B. Hurricane
Explanation
Hurricanes are very wide storms that form over the ocean. They are characterized by strong winds and heavy rainfall. While they originate over the water, hurricanes can also cause severe damage on land when they make landfall. This is due to the strong winds, storm surge, and heavy rainfall associated with hurricanes, which can lead to flooding, destruction of infrastructure, and loss of life. Therefore, hurricanes are known for their ability to cause significant damage both at sea and on land.

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• 9.

### Heavy rain and lightning warn of an approaching

• A.

Air mass

• B.

Hurricane

• C.

Thunderstorm

• D.

C. Thunderstorm
Explanation
Heavy rain and lightning are common characteristics of a thunderstorm. Thunderstorms are typically associated with the presence of cumulonimbus clouds, which are capable of producing heavy rain, lightning, thunder, and sometimes hail. Thunderstorms are often accompanied by strong winds and can sometimes lead to flash flooding. Therefore, the given answer of thunderstorm is the most appropriate choice based on the information provided.

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• 10.

### What are rotating columns of air that can reach speeds of 400 km (250 mi) per hour?

• A.

Air masses

• B.

Hurricanes

• C.

Thunderstorms

• D.

Explanation
Tornadoes are rotating columns of air that can reach speeds of 400 km (250 mi) per hour. They are characterized by their violent winds and funnel-shaped cloud formations. Unlike hurricanes, which form over warm ocean waters, tornadoes typically form over land during severe thunderstorms. Tornadoes are often associated with destructive winds and can cause significant damage to buildings and infrastructure in their path.

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• Current Version
• Jun 23, 2023
Quiz Edited by
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• Feb 24, 2010
Quiz Created by
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