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Handout 23-1 Name________________________________________ Period___________ Chapter 23: Section 1: Directed Reading Pages 575-580 Section: Atmospheric Moisture (page 575) 1. The states in which water exists in the atmosphere are called_____________________________. 2. The gas phase of water is called ______________________________________. 3. The solid phase of water is called ____________________________________. 4. The liquid phase of water is called __________________________________. CHANGING FORMS OF WATER (page 575) ______5. When does water change from one phase to another? a. when water molecules are held stationary b. when evaporation occurs c. when heat energy is absorbed or released d. when molecules are in a crystalline arrangement ______6. What phase does ice change into when it absorbs energy? a. gas b. liquid c. crystals d. solid ______ 7. When liquid water absorbs energy, it changes to a. a gas. b. a liquid. c. crystals. d. a solid. ______ 8. When liquid water evaporates, the water a. releases energy into the atmosphere. b. condenses into water vapor. c. starts to flow more rapidly. d. absorbs energy from the environment. ______ 9. The name for the process in which water vapor changes back into a liquid is a. condensation. b. latent heat. c. collision. d. evaporation ______ 10. What happens to latent heat when ice thaws? a. It is released. b. It is absorbed. c. It is recycled. d. It is lost. ______ 11Through what process does most water enter the atmosphere? a. evaporation b. absorption c. condensation d. release 12. Where on Earth does most evaporation take place?__________________________________________ 13. Name four other important sources of water vapor in the atmosphere. HUMIDITY (page 577) 14. humidity a. the temperature at which condensation equals evaporation 15. dew point b. water vapor in the atmosphere 16. mixing ratio c. the mass of water vapor contained in a given volume of air 17. absolute humidity d. the mass of water vapor in a unit of air relative to the mass of the dry air 18. What determines the rate of evaporation? 19. The measure of the actual amount of water vapor in the air is called the ________________________. 20. The ratio of the actual water vapor content of the air to the amount of water vapor needed to reach saturation is called _____________________________________. 21. What happens to the relative humidity if the temperature increases as the moisture in the air remains constant? 22. What causes dew to form? MEASURING HUMIDITY (page 579) 23. Why do meteorologists measure humidity? 24. What is the difference between the two thermometers of a psychrometer?

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Page 1: Chapter 23: Section 1: Directed Reading Pages 575-580srms-earth-science.wikispaces.com/file/view/Handout+23-1.pdf · Chapter 23 Section 1 Review Page’s 575 - 580 1. Explain how

Handout 23-1 Name________________________________________ Period___________

Chapter 23: Section 1: Directed Reading Pages 575-580

Section: Atmospheric Moisture (page 575) 1. The states in which water exists in the atmosphere are called_____________________________.

2. The gas phase of water is called ______________________________________.

3. The solid phase of water is called ____________________________________.

4. The liquid phase of water is called __________________________________.

CHANGING FORMS OF WATER (page 575) ______5. When does water change from one phase to another?

a. when water molecules are held stationary b. when evaporation occurs

c. when heat energy is absorbed or released d. when molecules are in a crystalline arrangement

______6. What phase does ice change into when it absorbs energy?

a. gas b. liquid c. crystals d. solid

______ 7. When liquid water absorbs energy, it changes to

a. a gas. b. a liquid. c. crystals. d. a solid.

______ 8. When liquid water evaporates, the water

a. releases energy into the atmosphere. b. condenses into water vapor.

c. starts to flow more rapidly. d. absorbs energy from the environment.

______ 9. The name for the process in which water vapor changes back into a liquid is

a. condensation. b. latent heat. c. collision. d. evaporation

______ 10. What happens to latent heat when ice thaws?

a. It is released. b. It is absorbed. c. It is recycled. d. It is lost.

______ 11Through what process does most water enter the atmosphere?

a. evaporation b. absorption c. condensation d. release

12. Where on Earth does most evaporation take place?__________________________________________

13. Name four other important sources of water vapor in the atmosphere.

HUMIDITY (page 577)

14. humidity a. the temperature at which condensation equals evaporation

15. dew point b. water vapor in the atmosphere

16. mixing ratio c. the mass of water vapor contained in a given volume of air

17. absolute

humidity

d. the mass of water vapor in a unit of air relative to the mass of the dry air

18. What determines the rate of evaporation?

19. The measure of the actual amount of water vapor in the air is called the ________________________.

20. The ratio of the actual water vapor content of the air to the amount of water vapor needed to reach

saturation is called _____________________________________.

21. What happens to the relative humidity if the temperature increases as the moisture in the air remains

constant?

22. What causes dew to form?

MEASURING HUMIDITY (page 579) 23. Why do meteorologists measure humidity?

24. What is the difference between the two thermometers of a psychrometer?

Page 2: Chapter 23: Section 1: Directed Reading Pages 575-580srms-earth-science.wikispaces.com/file/view/Handout+23-1.pdf · Chapter 23 Section 1 Review Page’s 575 - 580 1. Explain how

Chapter 23 Section 1 Review Page’s 575 - 580

1. Explain how most water vapor enters the air.

2. Identify the principal source from which most water vapor enters the atmosphere.

3. Identify the process by which ice changes directly into a gas.

4. Define humidity.

5. Compare relative humidity with absolute humidity.

6. Describe what happens when the temperature of air decreases to the dew point or below the

dew point.

7. Identify two instruments that are used to measure relative humidity.

8. Explain what would happen to a sample of air whose relative humidity is 100% if the

temperature decreased.