Unit 6 science study guide
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  • Question 1
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    Q.

    What MOST likely happens when a cold air mass comes into contact with a warm, moist air mass?

    answer choices

    The sky becomes clear.

    Rain or snow begins to fall.

    Cold air is pushed to high altitudes.

    Warm air is pushed to ground level.

  • Question 2
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    Q.

    Earth’s equator receives more direct sunlight than the regions to its north and south. This distribution of sunlight accounts directly for which phenomenon?

    answer choices

    the rotation of storm systems

    the westward deflection of equatorial winds

    the formation of calm “eyes” in the centers of cyclones

    the movement of rising air currents away from the equator

  • Question 3
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    Q.

    If an air mass develops over Region 1 which is northwest and over the ocean, what properties will it MOST likely have?

    answer choices

    hot and dry

    cool and moist

    cold and dry

    hot and moist

  • Question 4
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    Q.

    High-pressure systems stop air from rising into the colder regions of the atmosphere where water can condense. What will MOST likely result if a high-pressure system remains in an area for a long period of time?

    answer choices

    fog

    rain

    drought

    tornado

  • Question 5
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    Q.

    What are the characteristics of maritime polar air masses?

    answer choices

    warm and humid

    warm and dry

    cool and humid

    cool and dry

  • Question 6
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    Q.

    The arrows on the map represent the movement of air masses across North America.


    Air mass in Region 1 Canada, would MOST likely bring which weather conditions to a region?

    answer choices

    warm and humid

    cool and dry

    warm and dry

    cool and humid

  • Question 7
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    Q.

    A stationary air mass over the Gulf of Mexico would typically be

    answer choices

    warm and dry.

    warm and humid.

    cool and dry.

    cool and humid.

  • Question 8
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    Q.

    Convection currents are formed in the atmosphere when cold air pushes warm air upward.

    Which property of the air is MOST responsible for the formation of convection currents?

    answer choices

    specific heat

    density differences

    thermal conductivity

    chemical composition

  • Question 9
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    Q.

    Which is most often a result of a warm air mass moving over a cooler air mass?

    answer choices

    a decrease in wind speed

    a decrease in cloud cover

    an increase in air pressure

    an increase in precipitation

  • Question 10
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    Q.

    Which has the greatest influence on wind speed?

    answer choices

    differences in the density of adjacent air masses

    differences in atmospheric nitrogen concentrations

    differences in atmospheric carbon dioxide concentrations

    differences in ozone levels in the stratosphere

  • Question 11
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    Q.

    Tornadoes can occur throughout the United States. One area where most of the tornadoes occur is known as Tornado Alley.

    Which environmental factors MOST likely impact the formation of tornadoes in this area?

    answer choices

    high-pressure systems colliding with other high-pressure systems

    cold dry air and warm dry air moving toward each other

    low evaporation rates and windy conditions

    cool dry air colliding with warm moist air

  • Question 12
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    Q.

    How does air density affect air pressure in a cyclonic storm?

    answer choices

    Cool air rises, creating an area of low pressure under it.

    Warm air rises, creating an area of low pressure under it.

    Warm air rises, creating an area of high pressure under it.

    Cool air rises, creating an area of high pressure under it.

  • Question 13
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    Q.

    Which statement BEST explains why the force of a hurricane diminishes as the hurricane moves over land?

    answer choices

    A high-pressure area develops.

    The sea level rises on the coast.

    The winds start to spin clockwise.

    The supply of warm, moist air decreases.

  • Question 14
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    Q.

    The air masses that interact to form hurricanes and cyclones rise and fall due to changes in air density and air pressure. Why do these storms also spin?

    answer choices

    The Moon’s gravity pulls air currents with the tides.

    Ocean currents drag the air above them in circles.

    Low-pressure air pushes high-pressure air sideways.

    Earth’s rotation causes the air to turn as it moves north.

  • Question 15
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    Q.

    The table below shows lowest air pressure recorded for four hurricanes.

    Which hurricane had the highest wind speed?

    RitaKatrinaHugoKarl895 mbar (hPa);26.43 (inHg)902 mbar (hPa);26.64 (inHg)918 mbar (hPa);27.11 (inHg)956 mbar (hPa);28.23 (inHg)

    answer choices

    Rita

    Katrina

    Hugo

    Karl

  • Question 16
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    Q.

    Hurricanes typically form during predictable times of year and in certain locations on Earth. Which factor BEST enables climatologists to forecast the time and location of hurricane formation?

    answer choices

    ocean currents and temperature

    seasonal distance from the Sun

    thickness of the ozone layer

    angle of sunlight on Earth

  • Question 17
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    Q.

    Which are widely considered to be safe locations during a hurricane?

    answer choices

    in a kitchen, in a closet, under a stairwell

    on a porch, in a basement, in a bathroom

    under a stairwell, in a basement, in a closet

    in a bathroom, in a kitchen, on a porch

  • Question 18
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    Q.

    The high winds and torrential rains of a hurricane can cause damage to cities and natural areas in its path. A hurricane is likely to gain the MOST strength when it travels over which of the following?

    answer choices

    cool ocean

    inland area

    salty ocean

    warm ocean

  • Question 19
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    Q.

    A seven-day forecast is shown below.


    Golfing in severe weather can be dangerous due to the possibility of lightning strikes. According to the forecast, which of these would be the worst day to plan a golf outing?

    answer choices

    Thursday

    Friday

    Saturday

    Sunday

  • Question 20
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    Q.

    The radar image shows weather that is affecting a portion of the United States.

    Which type of severe weather is clearly shown by this radar image?

    answer choices

    tornado

    heat wave

    hurricane

    snowstorm

  • Question 21
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    Q.

    The map shows a typical jet stream pattern in the United States during spring months.

    During one spring, the jet stream shifted southward, moving across Texas and northern Florida. How would weather in North Carolina that spring compare to that of a typical year?

    answer choices

    cooler and drier

    cooler and wetter

    warmer and drier

    warmer and wetter

  • Question 22
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    Q.

    The map below shows yearly averages for the number of severe thunderstorm watches.


    Based on the information in the map, which region is MOST likely to have a severe thunderstorm watch in effect during storm season?

    answer choices

    Midwest

    Southeast

    Northwest

    Northeast

  • Question 23
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    Q.

    Which storm most likely develops as air masses interact with the warm water in the Indian and western Pacific ocean?

    answer choices

    typhoon

    tornado

    blizzard

    monsoon

  • Question 24
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    Q.

    Which statement describes the general movement of air masses?

    answer choices

    They move from areas of high pressure to areas of low pressure.

    They move from areas of high altitude to areas of low altitude.

    They move from areas of low humidity to areas of high humidity.

    They move from areas of low temperature to areas of high temperature.

  • Question 25
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    Q.

    Which most likely occurs when a fast-moving cold air mass moves into a region of warmer, moist air?

    answer choices

    It causes light precipitation for a short period of time.

    It causes heavy precipitation for a short period of time.

    It causes light precipitation for a long period of time.

    It causes heavy precipitation for a long period of time.

  • Question 26
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    Q.

    Which contributes to the formation of hurricanes during the late summer?

    answer choices

    the interaction between ocean water salinity and warm air masses

    the interaction between ocean water currents and polar air masses

    the interaction between ocean water salinity and ocean water density

    the interaction between ocean water temperatures and warm air masses

  • Question 27
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    Q.

    The weather station model shown below indicates that winds are coming from the

    answer choices

    Northwest at 10 knots

    Southeast at 10 knots

    Southeast at 20 knots

    Northwest at 20 knots

  • Question 28
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    Q.

    The diagrams represent station models showing weather data collected at four different times during one day at a location in the United States.

    }The diagrams represent station models showing weather data collected at four different times during one day at a location in the United States.

    answer choices

    1 p.m.

    10 a.m.

    7 a.m.

    4 p.m.

  • Question 29
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    Q.

    Which weather map symbol is associated with extremely low air pressure?

    answer choices
  • Question 30
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    Q.

    Cloud formation is likely to occur in rising air because rising air:

    answer choices

    contracts and cools

    expands and cools

    expands and warms

    contracts and warms

  • Question 31
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    Q.

    How does a cold front form?

    answer choices

    Warm air advances and replaces cold air

    Cold air advances, forcing warm air to rise

    Warm and cold air masses meet and mix

    Warm and cold air masses have no relative advancement

  • Question 32
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    Q.

    Jet stream winds over the United States generally move from

    answer choices

    east to west

    west to east

    north to south

    south to north

  • Question 33
    30 seconds
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    Q.

    How fast is the wind blowing at this weather station?

    answer choices

    20 knots

    15 knots

    10 knots

    2 knots

  • Question 34
    30 seconds
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    Q.

    Which map best represents the surface wind pattern around Northern Hemisphere high-pressure and low-pressure centers?

    answer choices
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