Global wind belts and the jet stream
Grade 9 Science Worksheet - Building Confidence
Circle the best answer.
Read this first
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A globe with three loops in each hemisphere.
How many circulation cells lie between the equator and each pole, by Ari's reading (NOAA)?
- One
- Six
- Three
- Two cells in each hemisphere
Which cell covers the tropics, with air rising near the equator, by Bo's reading (NOAA)?
- The Ferrel cell
- The jet cell
- The polar cell
- The Hadley cell
Which cell is the smallest and weakest, by Kira's reading (NOAA)?
- The Ferrel cell
- They are equal in size
- The Hadley cell
- The polar cell
Surface arrows for trades, westerlies and polar easterlies. From which direction do the Northern Hemisphere trade winds blow, by Jun's reading (NOAA)?
- From the southwest
- From the northeast
- From due west
- From the northwest
Use this
Bands of H and L on a globe.
Where are the belts of high pressure, by Noah's reading (NOAA)?
- Spread evenly everywhere
- Near 30° N and S, and at the poles
- At 50° to 60° N and S
- At the equator
Why are many deserts near 30° N and S, by Pia's reading (NOAA)?
- Trade winds carry rain there
- Low pressure there brings storms
- The jet stream sits on the ground there
- High pressure there brings fair, dry weather
What weather goes with the low-pressure band near 50° to 60°, by Ren's reading (NOAA)?
- Calm doldrums
- More storms and precipitation
- Clear, dry desert weather on most days
- No clouds year-round
Use this
A wavy jet stream high above the surface.
What is a jet stream, by Tala's reading (NOAA)?
- Rising air at the equator
- A narrow band of strong wind high in the atmosphere
- A breeze along the coast at ground level
- A warm ocean current
Which way do jet-stream winds blow, by Zee's reading (NOAA)?
- Straight up
- From west to east
- From east to west
- From north to south
About how high are jet streams, by Esme's reading (NOAA)?
- About 30,000 feet (9,100 m)
- About 300 miles above the ground
- At ground level
- About 300 feet