The correct answer is:
C - a kind of cyclone.
Because warm air is lighter, it rises while cold air moves down to take the warm air's place. This circular movement of air is called a convection current. Where the air rises, there's higher air pressure; where it falls, the pressure is low. Since cooling air can't hold as much water vapor as warm air can, the result may be rain, whether as a simple summer thunderstorm or a big hurricane.
A cyclone is a weather system where the air rushes into a low-pressure area, and winds rotate inward in a counterclockwise direction. Cyclones can be very powerful and destructive. A tornado is a very intense, small cyclone. As the very fast winds spiral inward and upward they can pick up large objects like trees, trucks and even rooftops.
The most powerful storms of all are called hurricanes (in Asia they are called typhoons). These huge cyclones can cover hundreds of square miles. Formed over warm tropical oceans, hurricanes can have winds of more than 125 miles per hour. These storms can cause incredible damage due to floods, waves, rain, and wind.
Hurricanes are
A
not created by air masses.
B
formed over arctic oceans.
C
a kind of cyclone.
D
less powerful than tornadoes.
11 answers
The Earth's atmosphere has changed over time. During the Ice Ages, huge ice glaciers covered much of North America under hundreds of feet of ice and snow. There have also been periods of global warming when polar ice has melted, flooding many lowland areas. One cause of these changes is the amount of materials like dust, soot, ash and gases in the atmosphere. How much of these materials are in the atmosphere affects the amount of energy that the Earth can absorb from the sun, making the climate warmer or cooler.
Today about 70% of the sun's energy entering the atmosphere is absorbed by the Earth; the rest is reflected back into space. At night excess heat radiates from the Earth and the planet cools. But gases like carbon dioxide, water vapor or air pollution block this radiation process and prevent the Earth from cooling. This is called the greenhouse effect. There is strong scientific evidence that increased pollution over the past hundred years has added to the amount of greenhouse gases in the atmosphere, causing our climates to change - hotter summers, new precipitation and wind patterns, stronger cyclones. If the global warming process continues, our planet will experience serious problems.
Which of these examples most closely models the greenhouse effect?
A
Turning on several fans at once can keep you cool in a heat wave.
B
Reinforced windows keep heat inside your house in the winter.
C
Opening the door lets the air conditioning out in the summer.
D
Lighting a fire keeps the drafty ski lodge warm when it’s snowing.
Back
Today about 70% of the sun's energy entering the atmosphere is absorbed by the Earth; the rest is reflected back into space. At night excess heat radiates from the Earth and the planet cools. But gases like carbon dioxide, water vapor or air pollution block this radiation process and prevent the Earth from cooling. This is called the greenhouse effect. There is strong scientific evidence that increased pollution over the past hundred years has added to the amount of greenhouse gases in the atmosphere, causing our climates to change - hotter summers, new precipitation and wind patterns, stronger cyclones. If the global warming process continues, our planet will experience serious problems.
Which of these examples most closely models the greenhouse effect?
A
Turning on several fans at once can keep you cool in a heat wave.
B
Reinforced windows keep heat inside your house in the winter.
C
Opening the door lets the air conditioning out in the summer.
D
Lighting a fire keeps the drafty ski lodge warm when it’s snowing.
Back
The example that most closely models the greenhouse effect is:
B - Reinforced windows keep heat inside your house in the winter.
This is similar to the greenhouse effect because it involves trapping heat inside a space, preventing it from escaping, much like greenhouse gases trap heat in the Earth's atmosphere.
What is the order of the events for the water cycle on a typical warm day?
A
rain, snow, sleet
B
precipitation, evaporation, rain
C
evaporation, condensation, precipitation
D
condensation, evaporation, precipitation
A
rain, snow, sleet
B
precipitation, evaporation, rain
C
evaporation, condensation, precipitation
D
condensation, evaporation, precipitation
The correct order of events for the water cycle on a typical warm day is:
C - evaporation, condensation, precipitation.
This sequence begins with evaporation of water from the Earth's surface, followed by condensation as the water vapor cools and forms clouds, and finally, precipitation occurs when the clouds become heavy enough to release the water in the form of rain.
Immersive Reader
The lowest level of the atmosphere is the
A
lithosphere.
B
troposphere.
C
stratosphere.
D
hydrosphere
The lowest level of the atmosphere is the
A
lithosphere.
B
troposphere.
C
stratosphere.
D
hydrosphere
The lowest level of the atmosphere is:
B - troposphere.
The troposphere is where most of the Earth's weather occurs and extends from the Earth's surface up to about 8 to 15 kilometers (5 to 9 miles) high, depending on latitude and weather conditions.
Immersive Reader
A large body of air that has similar pressure, temperature and atmospheric conditions is called a(n)
A
air mass.
B
jet stream.
C
precipitation.
D
weather front.
A large body of air that has similar pressure, temperature and atmospheric conditions is called a(n)
A
air mass.
B
jet stream.
C
precipitation.
D
weather front.
A large body of air that has similar pressure, temperature, and atmospheric conditions is called a(n):
A - air mass.
Immersive Reader
The name of the narrow belt of high-speed wind in the stratosphere is the
A
jet stream.
B
lithosphere.
C
hydrosphere.
D
weather front.
The name of the narrow belt of high-speed wind in the stratosphere is the
A
jet stream.
B
lithosphere.
C
hydrosphere.
D
weather front.
The name of the narrow belt of high-speed wind in the stratosphere is the:
A - jet stream.
1 answer