Download Chapter 2 section 1 pages 38-44

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Chapter 2 section 1 pages 38-44
Section: Water in the Air
Circle the letter of the best answer for each question.
1. What do we call the condition of the atmosphere at a certain time and
place?
a. the water cycle
b. weather
c. climate
d. precipitation
THE WATER CYCLE
2. How does water go from Earth into the air?
a. precipitation
b. condensation
c. evaporation
d. runoff
3. In what part of the water cycle do clouds form?
a. precipitation
b. evaporation
c. condensation
d. runoff
4. Rain, snow, sleet, and hail are forms of what?
a. condensation
b. evaporation
c. precipitation
d. runoff
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Understanding Weather
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HUMIDITY
Read the words in the box. Read the sentences. Fill in each blank with
the word or phrase that best completes the sentence.
humidity
water vapor
5. Moisture in the air is called ______________________
6. The amount of water vapor in the air is called_______________________
Circle the letter of the best answer for the question.
7. What happens when air gets warmer?
a. It can hold less water vapor.
b. It can hold more water vapor.
c. It cannot hold water vapor.
d. It holds as much water vapor as before.
Relative Humidity
Read the words in the box. Read the sentences. Fill in each blank with
the word or phrase that best completes the sentence.
relative humidity
saturated
8. The amount of water vapor in the air compared to the most water vapor
the air can hold is called the ______________________.
9. When the air holds all the water it can at a certain temperature, the air is
.______________________
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Understanding Weather
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Factors Affecting Relative Humidity
increases
decrease
10. If the amount of water vapor in the air stays the same, but the air gets
cooler, the relative humidity ______________________.
11. If the amount of water vapor in the air stays the same, but the air gets
warmer, the relative humidity ______________________.
Measuring Relative Humidity
Circle the letter of the best answer for each question.
12. How do you measure the relative humidity?
a. Use only a wet-bulb thermometer.
b. Use only a dry-bulb thermometer.
c. Use a psychrometer and a special table.
d. Cover a thermometer with a damp cloth.
How a W et-Bulb Thermometer Works
13. What does a wet-bulb thermometer do?
a. It measures temperature.
b. It measures relative humidity.
c. It measures condensation.
d. It measures humidity.
CONDENSATION
14. What is it called when a gas changes to a liquid?
a. evaporation
b. condensation
c. humidity
d. water vapor
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Understanding Weather
Name ______________________________ Class ___________________ Date __________________
Circle the letter of the best answer for each question.
15. When do water droplets form on the outside of a glass of ice water?
a. when the air is saturated and then cools
b. when the relative humidity goes up
c. when the air is very warm
d. when the relative humidity is 99%
Dew Point
16. What happens when air reaches its dew point?
a. Water evaporates.
b. The air becomes saturated.
c. Ice melts.
d. The air gets cooler.
CLOUDS
Circle the letter of the best answer for each question.
17. What is a cloud made of?
a. gases
b. warm air
c. water droplets
d. rain or snow
Cumulus Clouds
Read the words in the box. Read the sentences. Fill in each blank with
the word or phrase that best completes the sentence.
cumulus
cumulonimbus
18. A thunderstorm comes from a ______________________ cloud.
19. A puffy, white cloud with a flat bottom is a ______________________
cloud.
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Understanding Weather
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Stratus Clouds
stratus
nimbostratus
fog
20. A dark cloud that brings rain is a ___________________________ cloud.
21. A cloud that forms near the ground is ______________________.
22. Clouds that cover a large area are ______________________ clouds.
Cirrus Clouds
Circle the letter of the best answer for the question.
23. What can you predict if cirrus clouds get thicker?
a. It will rain.
b. It will get colder.
c. The weather will change.
d. The weather will turn fair.
Clouds and Altitude
Read the words in the box. Read the sentences. Fill in each blank with
the term that best completes the sentence.
cirro-
alto-
24. Clouds that form in middle altitudes are described as
______________________.
25. Clouds that form in high altitudes are described as
______________________.
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Understanding Weather
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PRECIPITATION
Circle the letter of the best answer for each question.
26. Which best defines precipitation?
a. evaporation
b. any form of water falling to Earth
c. runoff
d. water going from Earth into the air
Rain
27. What is the most common form of precipitation?
a. rain
c. sleet
b. snow
d. hail
Sleet and Snow
28. How does sleet differ from snow?
a. It is not precipitation.
b. It starts as rain.
c. It forms in cold weather.
d. It falls as single crystals.
29. How does snow form?
a. Water drops get larger.
b. Rain falls and freezes.
c. The wind blows rain upwards.
d. Water vapor changes to a solid.
Hail
30. What makes hail damaging to things on Earth?
a. It is precipitation.
b. It happens in cold weather.
c. It is balls of ice.
d. It comes in strong winds.
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Understanding Weather
Name ______________________________ Class ___________________ Date __________________
Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
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Understanding Weather