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Name ________________________________________________ Date _________________________ Pd. __________
Weather & Climate Chapter 2 Section 1
Section: Water in the Air
1. What do we call the condition of the atmosphere at a certain time and place?
A. the water cycle
C. weather
B. climate
D. precipitation
2. How does water go from Earth into the air?
A. precipitation
C. condensation
B. evaporation
D. runoff
3. In what part of the water cycle do clouds form?
A. precipitation
C. evaporation
B. condensation
D. runoff
4. Rain, snow, sleet, and hail are forms of what?
A. condensation
C. evaporation
B. precipitation
D. runoff
5. What is it called when a gas changes to a liquid?
A. evaporation
C. condensation
B. humidity
D. water vapor
What is Humidity?
Fill in each blank with the word or phrase that best completes the sentence.
humidity
water vapor
6. Moisture in the air is called ______________________
7. The amount of water vapor in the air is called_______________________
Circle the letter of the best answer for the question.
8. What happens when air gets warmer?
A. It can hold less water vapor.
B. It cannot hold water vapor.
C. It can hold more water vapor.
D. It holds as much water vapor as before
Relative Humidity
Fill in each blank with the word or phrase that best completes the sentence.
relative humidity
Saturated
9. The amount of water vapor in the air compared to the most water vapor the air can hold is called the
______________________.
10. 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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Name ________________________________________________ Date _________________________ Pd. __________
Measuring Relative Humidity
Circle the letter of the best answer for each question.
13. How do you measure the relative humidity?
A. Use only a wet-bulb thermometer. C.
B. Use only a dry-bulb thermometer. D.
Use a psychrometer and a special table.
Cover a thermometer with a damp cloth.
What is Dew Point?
14. What happens when air reaches its dew point?
A. Water evaporates.
B. Ice melts.
C. The air becomes saturated.
D. The air gets cooler.
15. When do water droplets form on the outside of a glass of ice water?
A. when the air is saturated and then cools
C. when the air is very warm
B. when the relative humidity goes up D.
when the relative humidity is 99%
How do Clouds form?
Circle the letter of the best answer for each question.
16. What is a cloud made of?
A. gases
B. water droplets or ice crystals
C.
D.
warm air
rain or snow
Clouds Diagram (Page 43)
Fill in each blank with the word or phrase that best completes the sentence.
Cumulus
Cumulonimbus
17. A thunderstorm comes from a ______________________ cloud.
18. A puffy, white cloud with a flat bottom is a ______________________ cloud.
Stratus
Nimbostratus
Fog
19. A dark cloud that brings rain is a ___________________________ cloud.
20. A cloud that forms near the ground is ______________________.
21. Clouds that cover a large area are ______________________ clouds.
cirro-
alto-
22. Clouds that form in middle altitudes are described as ______________________.
23. Clouds that form in high altitudes are described as ________________________.
Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
Holt Science and Technology
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Understanding Weather
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Name ________________________________________________ Date _________________________ Pd. __________
Circle the letter of the best answer for the question.
22. What can you predict if cirrus clouds get larger?
A. It will rain.
C. It will get colder.
B. The weather will change.
D. The weather will turn fair.
What is Precipitation?
Circle the letter of the best answer for each question.
25. Which best defines precipitation?
A. evaporation
B. runoff
C. solid or liquid water that falls to Earth
D. water going from Earth into the air
Rain
26. What is the most common form of precipitation?
A. rain
C. sleet
B. snow
D. hail
Sleet and Snow
27. How does sleet differ from snow?
A. It is not precipitation.
B. It forms in cold weather.
C. It starts as rain.
D. It falls as single crystals.
28. 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
29. What makes hail damaging to things on Earth?
A. It is precipitation.
C. It happens in cold weather.
B. It is balls of ice.
D. It comes in strong winds.
Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
Holt Science and Technology
16
Understanding Weather
WC 2.1