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6th grade · Science · Unit 7 of 9

Weather Systems

Air masses, fronts and the water cycle.

What your child practices

Practices how air masses and fronts change the weather, and how the sun and gravity drive the water cycle, including the Sierra Nevada's rain shadow and the atmospheric rivers that bring California's winter storms.

California Content Standards learning standard: MS-ESS2-4; MS-ESS2-5 · the water cycle driven by sunlight and gravity, and how air masses cause weather changes

Sample questions

A taste of this unit. In the app, questions change every time and get easier or harder to match your child.

  1. Question 1

    Rain, snow, sleet and hail are forms of…

    • condensation
    • evaporation
    • precipitation
    • transpiration

  2. Question 2

    Dew forms on grass on a cool morning because…

    • the sun melts it
    • it rained
    • water vapor condenses on cool surfaces
    • grass makes water

  3. Question 3

    Water soaking into the ground is…

    • condensation
    • transpiration
    • infiltration
    • evaporation

  4. Question 4

    Warm air is…

    • less dense, so it rises
    • always still
    • heavier than cold air
    • more dense, so it sinks

  5. Question 5

    Which instrument measures wind speed?

    • Barometer
    • Hygrometer
    • Thermometer
    • Anemometer

  6. Question 6

    What drives the water cycle?

    • Energy from the sun and gravity
    • Earth's magnetism
    • The moon only
    • Wind only

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