Weather

​Weather

Multiple Choice

What is a stationary front?

• A boundary between two air masses that is not moving
• A front that forms in the middle of the ocean
• A front that only occurs in the winter
• A type of front that moves quickly across the sky

Multiple Choice

What causes an occluded front?

• A warm front overtaking a cold front
• A stationary front moving in the opposite direction
• A cold front dissipating before reaching a warm front
• Faster moving cold front overtaking a slower moving warm front

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◆Middle-latitude cyclones are large centers of low pressure that generally travel from west to east and cause stormy weather.

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Middle-Latitude Cyclone

​Notice how the stationary front wraps around and closes on itself like a zipper.

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The Role of Airflow Aloft

◆More often than not, air high up in the atmosphere fuels a middle-latitude cyclone.

Multiple Choice

What is a jet stream?

• A species of fast-moving fish found in the ocean
• A narrow, fast-flowing air current found in the atmosphere
• A type of water slide at a theme park
• A popular brand of household cleaning products

• Spins in a CCW direction

• air is pushed up

• high humidity

• cyclones

• Bad weather

low Pressure Systems

• CW direction

• air pushed down

• low humidity

• anticyclones

• Fair weather

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high pressure systems

​Cyclones	​Anticyclones
​Low pressure	​High pressure
​CCW rotation	​CW rotation
​Bad weather	​Fair weather
​high humidity	​low humidity
​air pushed down	​air pushed up

Multiple Choice

What type of weather does an anticyclone make?

• Clear, dry, and calm weather
• Snowy and blizzard conditions
• Rainy and stormy weather
• Foggy and misty atmosphere

Multiple Choice

In what direction does a cyclone rotate?

• It doesn't rotate, it moves in a straight line
• CW

• It rotates randomly in different directions
• CCW

• ​Storm that generates thunder and lightning

• Produce gusty winds, heavy rain and hail

Thunderstorms

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Stages in the Development

of a Thunderstorm

​forms when warm, humid air rises in an unstable environment

Tornadoes are violent windstorms that take the form of a rotation column of air called a vortex. The vortex extends downward from
a cumulonimbus cloud.

Tornadoes

​Form from mesocyclones

Formation of a Mesocyclone

​A mesocyclone is a vertical cylinder of rotating air that develops in the updraft of a thunderstorm.

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Because tornado winds cannot be measured directly, a rating on the Fujita scale is determined
by assessing the worst damage produced by the
storm.

Intensity

Tornado has been sighted. Beware.

​Warning

Conditions are good for a tornado to form. Be on the lookout.

Watch

Tornado Watch vs warning

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Multiple Choice

How is the intensity of a tornado assessed?

• By counting the number of lightning strikes
• By measuring the wind speed with a barometer
• Using the Enhanced Fujita (EF) scale
• By observing the color of the sky

Multiple Choice

What is the Enhanced Fujita Scale based on?

• Damage caused by a tornado
• Number of lightning strikes during a storm
• Size of hailstones in a thunderstorm
• Wind speed of a hurricane

Hurricanes

​Hurricanes

• produce up 119 kmph winds

• massive, humid cyclones

• develop in late summer

  • need the moisture and heat for energy

• most occur between 5 and 20 degrees latitude

• Eye

  • calm zone in the center

  • about 20 km in diameter

• Eye wall

  • doughnut shaped network of cumulonimbus clouds

​

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When excess water is pushed on shore due to strong winds

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Storm surge

Multiple Choice

How are tornadoes and hurricanes different?

• Tornadoes have slower wind speeds and are larger in size compared to hurricanes.
• Tornadoes and hurricanes have the same wind speeds and size.
• Tornadoes occur in the ocean while hurricanes occur on land.
• Tornadoes have faster wind speeds and are smaller in size compared to hurricanes.

Labelling

Label the parts of a hurricane

Drag labels to their correct position on the image

eye

eye wall

calm zone

rain ring

Multiple Choice

Where do hurricanes usually occur?

• Tropical regions with warm ocean waters
• Polar regions with cold temperatures
• Deserts with dry air
• Mountainous areas with high elevation

Multiple Choice

What is a storm surge?

• The strong winds that accompany a hurricane
• A type of tornado that forms over water
• A sudden decrease in air pressure during a storm
• A rise in sea level caused by a storm

Multiple Choice

What do blue triangles facing the same direction mean?

• cold front

• warm front

• occluded front

• stationary front

Multiple Choice

What does this mean?

• cold front

• warm front

• occluded front

• stationary front

Multiple Choice

Where does the air go in an anticyclone?

• It disappears into the ground
• Nowhere, it stays still
• Inward and upward
• Outward and downward

Multiple Choice

What is air pressure?

• The amount of oxygen in the air
• The speed at which air moves
• The temperature of the air
• The force exerted on a surface by the weight of the air above it.

Multiple Choice

Where is the ozone located?

• In the Earth's core
• In the Earth's atmosphere
• In the Earth's mantle
• In the Earth's stratosphere

Multiple Choice

What is smog?

• A type of soil contamination caused by agricultural chemicals
• A type of water pollution caused by industrial waste
• A type of weather phenomenon caused by excessive heat
• A type of air pollution that is a mixture of smoke and fog

Multiple Choice

When carbon and sulfur mix with water in the atmosphere, what type of rain is formed?

• acid rain
• chocolate rain
• salt rain
• sugar rain

Multiple Choice

What layer of the atmosphere does weather occur?

• Mesosphere
• Stratosphere
• Thermosphere
• Troposphere

Multiple Choice

Where is the ionosphere located?

• Underneath the Earth's crust
• Earth's upper atmosphere
• On the surface of the Moon
• In the center of the Earth

Multiple Choice

What is an example of carbon pollution?

• Planting trees
• Burning of fossil fuels
• Using renewable energy
• Reducing plastic waste

Poll

How do you think you're going to do on the test?

• I am going to ace it

• I'll be alright

• Mrs. Robbins, I might need some help

• What test?!