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Unit 2 Weather - Retest

Last updated almost 3 years ago
9 questions
Note from the author:
Reassessment for Unit on Weather in 6th Science. Includes reteaching material and checks for understanding.
Read the text to relearn the concepts from each lesson. Next, answer the questions about that lesson.
Lesson 2 - Humidity is the measure of the amount of water vapor in the air. You are more likely to feel the humidity on a hot, summer day because warm air can hold more water vapor than cool air. When air has as much water vapor in it as it can hold, the air is saturated. Scientists measure the humidity by describing how many grams of water are found in a cubic meter of air, or g/m.

Relative humidity measures the amount of water vapor in the air as a percentage of the maximum amount that saturated air can hold at a given temperature.

When the air reaches 100% relative humidity, it is saturated and cannot hold any more water vapor. At this point, it will rain or condensation will form. This is called the dew point. The dew point temperature is the temperature at which air is saturated.

Both relative humidity and dew point measure how much water vapor is in the atmosphere. Relative humidity, however, is temperature-dependent while dew point is not. The dew point is simply a measure of how much moisture is in the air at a given time. The higher the dew point, the muggier it will feel. You can use dew point as a forecasting tool to show if it is going to be hot and sticky or dry and pleasant.
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Relative humidity is...

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Dew point is...

Watch the video below on Air Pressure before answering the questions.
Key Words
air pressure – is the pressure that air exerts as it is being pulled to Earth by gravity
high-pressure system – a weather system associated with sinking air resulting in clear weather
low-pressure system – a weather system associated with rising air resulting in cloudy, rainy, or snowy weather
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Lesson 3 - Under high pressure, you can generally expect sunny skies and calm weather. Low pressure is what causes active weather. The air is lighter than the surrounding air masses so it rises. Rising air makes the water vapor in the air condense and form clouds and rain for example.

Which is correct about how air typically moves?

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True or Fales - Under high pressure, you can generally expect sunny skies and calm weather.

For the next section, watch the video below on Air Masses and how they are named based on the source before answering the questions.
Key Words
air mass – a large body of air that has uniform temperature and humidity
front – a boundary between two or more air masses

Lessons 4 and 5 - Air masses are large volumes of air that have generally the same temperature and pressure. Air masses are commonly classified according to four basic source regions with respect to latitude. These are Polar (cold), Arctic (very cold), Equatorial (warm and very moist), and Tropical (warm). The air masses in and around North America include the continental arctic (cA), maritime polar (mP), maritime tropical (mT), continental tropical (cT), and continental polar (cP) air masses.
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Which air mass would bring hot, humid (wet) weather?

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A continental polar air mass moves into an area. Based on the characteristics of this type of air mass, which changes are most likely to happen in the area?

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Which statement best describes the air behind a cold front?

The following two questions require you to provide a written response. Once you have submitted your assessment, send me a webmail so I can update your grade.
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Lesson 6 - Explain why weather can be predicted only as probable, not definite.

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Make a prediction - According to the map, how will the weather change in Minneapolis? What is causing this change in weather?