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WorksheetsREVIEW: Unit 9: Air Pressure and Wind
Total questions: 115
Worksheet time: 1hrs 3mins
What is air pressure?
The weight of air molecules on surfaces, including skin and the ground
The speed at which air molecules move
The temperature of the atmosphere
The density of water vapor in the air
What is the approximate weight of air above every square inch of your body at sea level?
10.2 pounds
14.7 pounds
20.5 pounds
8.3 pounds
Why don’t we notice the pressure exerted by air on our bodies?
Because the air pressure is too low to feel
Because it pushes equally in all directions and our bodies are adapted to it
Because air molecules are weightless
Because air pressure only affects the ground, not living beings
The composition of air molecules includes which of the following components?
Nitrogen, oxygen, water vapor, and carbon dioxide
Hydrogen, helium, methane, and ozone
Nitrogen, argon, neon, and krypton
Oxygen, carbon monoxide, sulfur dioxide, and ammonia
What is air pressure defined as?
The weight of air molecules in a vacuum
The force of air molecules pushing on a surface
The temperature of air molecules in a given space
The density of air molecules in the atmosphere
What happens to air pressure when warm air expands and becomes less dense?
Air pressure increases
Air pressure decreases
Air pressure remains constant
Air pressure fluctuates
Why does cold air create higher air pressure?
Cold air molecules spread out and become less dense
Cold air molecules contract and become more dense
Cold air molecules rise and create a vacuum
Cold air molecules evaporate and reduce pressure
How does temperature influence air pressure?
By changing the altitude of air molecules
By affecting how tightly packed air molecules are
By altering the humidity levels in the atmosphere
By increasing the weight of air molecules
Why do climbers on tall mountains often feel short of breath?
There is more oxygen in the air at higher altitudes.
There is less pressure and fewer oxygen molecules in each breath.
The air is warmer and denser at higher altitudes.
The air pressure is higher, making it harder to breathe.
What is the relationship between altitude and air density?
Air density increases as altitude increases.
Air density decreases as altitude increases.
Air density remains the same regardless of altitude.
Air density fluctuates randomly with altitude.
What is the air pressure like at lower altitudes?
Lower air pressure.
Higher air pressure.
Constant air pressure.
Fluctuating air pressure.
What is the relationship between water vapor and air pressure?
Water vapor increases air pressure by adding heavier molecules.
Water vapor decreases air pressure by replacing heavier molecules.
Water vapor has no effect on air pressure.
Water vapor increases air pressure by increasing air density.
What is the function of the Eustachian tube in the middle ear?
To amplify sound waves.
To equalize air pressure inside the ear with the outside air pressure.
To produce earwax.
To connect the ear to the brain.
What happens to the air pressure in the cabin when a plane descends?
The air pressure decreases.
The air pressure remains constant.
The air pressure increases.
The air pressure fluctuates randomly.
Which statement best describes the difference in mass and composition of air at 0% humidity and 100% humidity, considering the presence of nitrogen (N2), oxygen (O2), and water vapor (H2O) molecules?
Air at 100% humidity contains more water vapor (H2O) and has a lower overall mass than air at 0% humidity due to the replacement of heavier nitrogen and oxygen molecules.
Air at 0% humidity contains more water vapor (H2O) and has a higher overall mass than air at 100% humidity.
Air at 100% humidity contains less nitrogen (N2) and oxygen (O2) but has a higher overall mass than air at 0% humidity.
Air at 0% humidity contains equal amounts of nitrogen (N2), oxygen (O2), and water vapor (H2O) compared to air at 100% humidity.
Which of the following is a characteristic of a low-pressure system?
Calm and dry weather
Cooler nights without clouds
Cloudy weather with precipitation
Clear skies and quiet days
Why do very low-pressure systems often lead to intense weather events?
They trap heat during the day
They cause air to sink rapidly
They lead to rising air and condensation
They prevent clouds from forming
What type of weather is more likely in a low-pressure system?
Snow, rain, or storms
Calm and dry conditions
Clear and sunny skies
Hot and dry weather
How does air behave in a low-pressure system?
It sinks and becomes dense
It rises and cools, leading to condensation
It remains stationary
It becomes warmer and denser
What happens to the mercury level in a mercury barometer when air pressure is high?
The mercury level drops.
The mercury level remains unchanged.
The mercury level rises.
The mercury evaporates.
What does the height of the mercury column in a barometer indicate?
Temperature
Air pressure
Humidity
Wind speed
Why are aneroid barometers more common today compared to mercury barometers?
They are more accurate.
They do not use liquid.
They are larger in size.
They are less sensitive to pressure changes.
What happens to the metal chamber in an aneroid barometer when air pressure is high?
It expands.
It contracts.
It remains unchanged.
It breaks.
What allows the metal chamber in an aneroid barometer to expand?
High pressure
Low pressure
High temperature
Low temperature
What is the standard air pressure at sea level in millibars (mb)?
1013 mb
1000 mb
29.92 mb
950 mb
What does 1 atmosphere (atm) equal in terms of Pounds per Square Inch (psi)?
14.7 psi
101.3 psi
29.92 psi
1013 psi
What is the value of 1 atmosphere (atm) in Millibar (mb)?
1013 mb
14.7 mb
29.92 mb
101.3 mb
What weather condition is usually associated with circles of high pressure (H) on a weather map?
Clear skies
Storms
Rain
Snow
Which of the following statements is true about air pressure?
Air pressure increases as you move closer to the 996 mb isobar.
Air pressure decreases as you move closer to the 1002 mb isobar.
Air pressure remains constant along a single isobar.
Air pressure fluctuates randomly along isobars.
Lines on a map that connect places of equal air pressure.
Air pressure
Mercury barometer
Aneroid barometer
Barograph
Isobars
How does an aneroid barometer work?
The chamber in the barometer expands when the air pressure decreases, and contracts when the air pressure increases
The mercury is forced up the tube when the air pressure increases, and the mercury falls when air pressure decreases
When the temperature drops, that means the air pressure will drop as well
Air pressure increases with an increase in cloud cover, so the barometer measures the amount of sunlight reaching the instrument
Use the following air pressures recorded throughout the day to decide what is likely to happen with the weather: 1012 mb at 9am, 1003 mb at 12pm, 998 mb at 3pm, 991 mb at 6pm, 887 mb at 9pm
Most likely clear skies and fair weather are moving in
Most likely warm temperatures are moving in
Most likely clouds and precipitation are moving in
Most likely the weather will be unchanging
Identify Item #1 in the picture below:
Isobars
Isotherms
Contours
Coriolis
Which of the following correctly describes Air #1:
Warm air, less dense, rising and expanding
Cool air, less dense, rising and expanding
Warm air, more dense, sinking and condensing
Cool air, more dense, sinking and condensing
Which of the following correctly describes Air #2:
Warm air, less dense, rising and expanding
Cool air, less dense, rising and expanding
Warm air, more dense, sinking and condensing
Cool air, more dense, sinking and condensing
Hot air rises, creating an area of low pressure. Adjacent areas with higher air pressure will adjust and move air molecules to the low pressure area. What is the primary energy source that drives this cycle?
Ocean currents
The Sun
The Moon
Geothermal energy
Air in the atmosphere continuously moves by convection. At the equator, air rises; at the poles, it sinks. This occurs because:
The Earth's ozone layer is thinner at the equator than at the poles
The Earth's magnetic field is stronger at the poles than at the equator
Warm air can hold less water vapor than can cold air
Warm air is less dense than cold air
Rain is in the forecast for later in the day in Lockport. Which of the following sets of barometric pressure readings would you expect to see:
9 AM: 1010 mb / 10AM: 1000 mb / 11 AM: 990 mb / 12 PM: 980 mb
9 AM: 980 mb / 10AM: 990 mb / 11 AM: 1000 mb / 12 PM: 1010 mb
9 AM: 940 mb / 10AM: 945 mb / 11 AM: 940 mb / 12 PM: 945 mb
9 AM: 1010 mb / 10AM: 1011 mb / 11 AM: 1011 mb / 12 PM: 1012 mb
Which of the following best explains why the pressure inside a high-flying airplane must be controlled?
At high altitudes there is greater atmospheric pressure and more oxygen molecules than on the surface of the Earth.
At high altitudes there is lower atmospheric pressure and fewer oxygen molecules than on the surface of the Earth.
If the cabin is not pressurized, ozone and other upper atmospheric gases will enter the airplane.
If the cabin is not pressurized, carbon dioxide will escape from the airplane.
At high altitudes, airplanes that do not control air pressure would become too light and float into space
Use the following air pressures recorded throughout the day to decide what is likely to happen with the weather: 1012 mb at 9am, 1003 mb at 12pm, 998 mb at 3pm, 991 mb at 6pm, 887 mb at 9pm
Most likely clear skies and fair weather are moving in
Most likely warm temperatures are moving in
Most likely clouds and precipitation are moving in
Most likely the weather will be unchanging
Which pressure would most likely be associated with Denver, Colorado (The mile high city):
853.8 millibars
1013.2 millibars
1020.6 millibars
1030.1 millibars
1045.5 millibars
What is the ultimate source of wind on Earth?
Ocean currents
Earth's rotation
The Sun
The Moon
What causes air to move from one place to another, creating wind?
Friction with the ground
Differences in air pressure
Earth's magnetic field
The Coriolis effect
What happens to warm air near Earth's surface?
It becomes less dense and rises
It moves toward high-pressure areas
It becomes denser and sinks
It cools down and stays in place
What does the pressure gradient describe?
The speed of Earth's rotation
How quickly air pressure changes over a distance
The direction of wind flow
The temperature difference between two areas
What do closely spaced isobars on a weather map indicate?
Calm weather
Weak winds
Strong winds
No wind
What role does friction play in wind movement near Earth's surface?
It speeds up the wind
It slows down the wind
It eliminates the Coriolis effect
It increases air pressure
What is the Coriolis effect?
The movement of air from high to low pressure
The slowing of wind due to friction
The bending of moving air caused by Earth's rotation
The heating of air near the equator
In which direction does moving air curve in the Northern Hemisphere due to the Coriolis effect?
To the left
Straight upward
Straight downward
To the right
Where is the Coriolis effect the weakest?
In the upper atmosphere
In the middle latitudes
At the equator
At the poles
What are jet streams?
Slow-moving winds near Earth's surface
Fast-moving, narrow bands of wind in the upper atmosphere
Winds caused by the Coriolis effect
Winds that blow from the poles to the equator
What causes jet streams to form?
The rotation of Earth
Large temperature differences between the equator and the poles
The movement of ocean currents
Friction near Earth's surface
What is the primary role of the jet stream in weather patterns?
To create high-pressure systems
To guide storms and air masses
To eliminate the Coriolis effect
To slow down wind speeds
What is the polar vortex?
A type of local wind in the Arctic
A warm air mass near the poles
A fast-moving jet stream near the equator
A large, spinning mass of cold air over the North Pole
What happens when the jet stream weakens or becomes wavy?
Warm air moves toward the poles
The polar vortex strengthens
Winds stop completely
Cold Arctic air dips south
What does wind chill measure?
The speed of the wind
The direction of the wind
The actual air temperature
How cold the air feels on your skin
What increases the risk of frostbite and hypothermia during winter?
High air pressure
Wind chill
The Coriolis effect
Jet streams
How are winds named?
Based on the direction they come from
Based on the direction they are blowing toward
Based on their temperature
Based on their speed
What are trade winds?
Winds near the equator that blow from the east
Winds in the middle latitudes that blow from the west
Winds near the poles that blow from the north
Winds caused by the polar vortex
What are westerlies?
Winds caused by the Coriolis effect
Winds near the poles that blow from the north
Winds in the middle latitudes that blow from the west
Winds near the equator that blow from the east
What is the main cause of the Coriolis effect?
Friction with the ground
Temperature differences
Differences in air pressure
Earth's rotation
What is the approximate speed of a point on the equator due to Earth's rotation?
1,037 miles per hour
750 miles per hour
500 miles per hour
2,000 miles per hour
What happens to the linear speed of Earth's rotation as you move toward the poles?
It increases
It decreases
It remains constant
It doubles
What is the main factor that influences large-scale wind patterns like trade winds?
Wind chill
The Coriolis effect
Friction with the ground
Jet streams
What is the role of friction in the formation of jet streams?
It creates high-pressure systems
It slows down the winds near Earth's surface
It speeds up the winds in the upper atmosphere
It eliminates the Coriolis effect
What is the main reason for the uneven heating of Earth's surface?
The shape of Earth
The tilt of Earth's axis
The distance from the Sun
The rotation of Earth
What is the function of isobars on a weather map?
To display the Coriolis effect
To show temperature differences
To indicate wind speed
To connect areas of equal air pressure
What is the main reason for the formation of the polar vortex?
The Coriolis effect
Cold air over the North Pole
Jet streams
Friction with the ground
What is the main reason for the wavy pattern of the jet stream?
Friction with the ground
The Coriolis effect
Temperature differences between the equator and the poles
Wind chill
What is the main reason for the fast movement of jet streams?
High air pressure
Wind chill
The Coriolis effect
Lack of friction in the upper atmosphere
Air would travel in a straight line from areas of high pressure to areas of low pressure if not for:
Earth's rotation
Earth's revolution (orbit)
The Moon's gravitational pull
Tidal periods (ebb and flood)
Ocean currents
Which of the following would not exists on Earth if the Earth did not rotate and there was no friction (CHOOSE ALL THAT APPLY):
Tornadoes
Hurricanes
Wind
Mountains
Temperature
Which of the following are factors that influence wind (CHOOSE ALL THAT APPLY):
Pressure-gradient force
Coriolis force
Friction
Ocean currents
Tsunami
Of the three factors that influence wind, ______________________ is the force that actually creates the wind.
coriolis effect
friction
pressure-gradient force
In general, the _________________ the pressure differences, the _________________ the wind speed.
greater, greater
weaker, greater
greater, weaker
Closer isobars indicate a ________________________
strong pressure gradient and strong winds
weak pressure gradient and weak winds
strong pressure gradient and weak winds
weak pressure gradient and strong winds
Widely spaced isobars indicate:
strong pressure gradient and strong winds
weak pressure gradient and weak winds
strong pressure gradient and weak winds
weak pressure gradient and strong winds
Based on the image below, near which location would wind speeds be the greatest:
1
2
3
Which of the following is NOT TRUE of the Coriolis force:
It is directed at right angles to the direction of airflow
Affects wind direction
Stronger wind speed means a greater deflection
Strongest near the poles
Only happens in the Northern hemisphere
Draw an arrow representing the movement of air in the image:
What is a cyclone?
A large system of air spinning inward toward a center of low pressure
A large system of air spinning outward from a center of high pressure
A small localized weather event
A type of volcanic eruption
What is the air pressure like in the center of a cyclone?
Equal to the surrounding area
Unpredictable
Lower than the surrounding area
Higher than the surrounding area
In the Northern Hemisphere, how do cyclones rotate?
Horizontally
Counterclockwise
They do not rotate
Clockwise
What causes cyclones to rotate differently in the Northern and Southern Hemispheres?
The angle of the Moon
The position of the Sun
The shape of the Earth
The Coriolis effect
Which type of cyclone is responsible for rainstorms, snowstorms, and cold fronts in the Midwest?
Subtropical cyclone
Tropical cyclone
Mid-latitude (extratropical) cyclone
Polar cyclone
What type of cyclone forms over warm ocean water?
Mid-latitude cyclone
Tropical cyclone
Anticyclone
Polar cyclone
Which of the following is NOT a type of tropical cyclone?
Tornado
Typhoon
Hurricane
Tropical storm
What is an anticyclone?
A type of volcanic eruption
A large weather system with a center of high air pressure
A large weather system with a center of low air pressure
A small localized weather event
What happens to air in an anticyclone?
It rises and cools
It sinks and warms
It converges and forms clouds
It rotates counterclockwise
In the Northern Hemisphere, how do winds in an anticyclone rotate?
Clockwise
Counterclockwise
Horizontally
They do not rotate
What type of weather is typically associated with anticyclones?
Stormy weather
Fair weather
Strong winds
Heavy precipitation
What can happen if an anticyclone stays in place for a long time?
It can cause heat waves or droughts
It can lead to hurricanes
It can create tornadoes
It can result in heavy snowfall
What is the movement of air between cyclones and anticyclones at the surface?
Air flows from high pressure to low pressure
Air flows from low pressure to high pressure
Air does not move between them
Air flows horizontally without pressure differences
What happens to air above a cyclone?
It converges and sinks
It diverges and rises
It rotates clockwise
It remains stationary
What happens to air above an anticyclone?
It rotates counterclockwise
It remains stationary
It diverges and rises
It converges and sinks
What is the Coriolis effect?
The effect of Earth's rotation on large-scale air and water movement
The effect of the Sun's gravity on Earth's atmosphere
The effect of Earth's magnetic field on weather patterns
The effect of the Moon's gravity on ocean tides
Why does the Coriolis effect not influence toilet water?
The Coriolis effect is too weak on small scales
Toilet water spins randomly
Toilet water is not affected by gravity
The Coriolis effect only affects the Southern Hemisphere
What determines the direction toilet water spins?
The hemisphere it is located in
The shape of the toilet bowl and water jets
The temperature of the water
The Coriolis effect
What is the role of cyclones in Earth's weather system?
They help move heat and moisture around the planet
They are unrelated to climate patterns
They prevent the formation of clouds
They only cause destructive storms
What is the role of anticyclones in Earth's weather system?
They only cause destructive storms
They help explain fair weather conditions
They prevent the formation of clouds
They are unrelated to climate patterns
What is the vertical movement of air in a cyclone?
Air rises and converges
Air sinks and spreads outward
Air rotates horizontally
Air remains stationary
What is the vertical movement of air in an anticyclone?
Air rotates horizontally
Air remains stationary
Air rises and converges
Air sinks and spreads outward
What happens to surface air in a cyclone?
It rotates clockwise
It remains stationary
It diverges and sinks
It converges and rises
What happens to surface air in an anticyclone?
It remains stationary
It diverges and sinks
It rotates counterclockwise
It converges and rises
What is the relationship between surface and upper-level airflows in cyclones?
They work as disconnected systems
Rising air at the surface supports divergence aloft
Sinking air at the surface supports convergence aloft
They do not influence each other
What is the relationship between surface and upper-level airflows in anticyclones?
Rising air at the surface supports divergence aloft
Sinking air at the surface supports convergence aloft
They work as disconnected systems
They do not influence each other
What is the primary driver of stormy weather in cyclones?
Rising air
Stationary air
Horizontal air movement
Sinking air
What is the primary driver of fair weather in anticyclones?
Horizontal air movement
Rising air
Sinking air
Stationary air
What is the main difference between cyclones and anticyclones?
Cyclones rotate clockwise, anticyclones rotate counterclockwise
Cyclones have high pressure, anticyclones have low pressure
Cyclones are stationary, anticyclones move
Cyclones have low pressure, anticyclones have high pressure
What is the effect of Earth's rotation on airflows?
It prevents airflows from moving
It causes airflows to move in straight lines
It causes airflows to curve due to the Coriolis effect
It has no effect on airflows
