Air masses, fronts and the weather they bring

Grade 6 Science Worksheet

Circle the best answer.

1. 1.

   Weather map with a cold front (blue line, triangles) just west of a town dot, moving east. A cold front passes Bo's town in the afternoon. Which weather change is most likely?

   • Warmer, more humid air afterward
   • A quick storm, then cooler, drier air
   • Days of steady rain, then warmer, humid air
   • No change; fronts are just map lines
2. 2.

   A warm front slowly moves into Esme's area. Which weather pattern comes with it?

   • Clear skies the whole time
   • Cooler, drier air right away
   • A quick storm, then cooler air
   • Hours of steady, light rain, then warmer air
3. 3.

   A front stalls over Jun's town for three days. Which weather is likely?

   • Clear skies, since the front stopped
   • Several days of clouds and rain
   • Nothing; fronts have to keep moving
   • A quick storm, then clear skies
4. 4.

   “Weather map:” A cold front moving east lies between City A (to the west, 55°F) and City B (to the east, 80°F). Which city does Kira expect storms in next?

   • City B, ahead of the front
   • Neither; fronts don't bring storms
   • City A, behind the front
   • Both cities at the same time
5. 5.

   On Luz's map, City P sits under an L and City Q sits under an H. Which city is more likely to have clouds and rain?

   • Both cities equally
   • City P, under the L
   • Neither; pressure has no effect
   • City Q, under the H

6. Read this first

   Use this

   Map of the central United States with a rain area over Kansas; Colorado to the west and Missouri to the east are labeled.

7. 6.

   A rainstorm is over Kansas today. Where is it most likely to be tomorrow, by Milo's forecast?

   • Farther west, over Colorado
   • Farther east, toward Missouri
   • Still over Kansas, since storms stay put
   • Straight north into Canada
8. 7.

   a wedge of cold air moving right and pushing into warm, humid air; arrows over the warm air are blank. Cold air from Canada pushes into warm, humid air over Iowa. What happens to the warm air, in Pia's notes?

   • Nothing; the air masses stay apart
   • It turns into cold, dry air at once on contact
   • It sinks underneath the cold air
   • It is pushed up, cools and forms clouds
9. 8.

   “Side view:” A warm front is moving north toward Ren's town. Where do its first clouds usually appear?

   • Nowhere; warm fronts bring clear skies
   • Right on the front line, not before
   • Behind the front, after it passes
   • Far ahead of the front, as warm air slides up

10. Table, Weather log (example data), with columns Time, Temperature, Pressure, Wind and Sky

    1 p.m., 82°F (28°C), pressure falling, wind from the south, hazy; 3 p.m., 80°F, lowest pressure, wind from the south, cloudy; 4 p.m., temperature and pressure not recorded, wind shifts to the west, thunderstorm; 6 p.m., 68°F (20°C), pressure rising, wind from the northwest, clearing.

11. 9.

    Using the same log, which entry best shows that cooler, drier air has arrived, by Zee's reading?

    • The 6 p.m. drop to 68°F with northwest wind
    • The 3 p.m. lowest pressure
    • The 1 p.m. south wind
    • The 4 p.m. thunderstorm
12. 10.

    Ari's barometer rises steadily for two days, from 29.70 to 30.20 inches. Which weather does Ari expect?

    • More clouds and rain as low pressure deepens
    • No change, since pressure doesn't matter
    • Clearing skies as high pressure moves in
    • A warm front with steady rain