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Water in the Air

Water in the Air

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Water in the Air

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  1. Water in the Air Vocabulary Words for Chapter 15/ Section 1:

  2. (1) Weather • Sentence: In good weather, my family plans lots of outside events. • Context Clues: Good; outside events

  3. Weather: [noun] The daily conditions of the atmosphere in terms of temperature, atmospheric pressure, wind, and moisture. (page 506) • Synonyms: None. • Antonyms: None.

  4. (2) Humidity • Sentence: In many areas of the United States, the high humidity makes you feel warmer than it actually is. This can be very uncomfortable. • Context Clues: High humidity; warmer than it actually is

  5. Humidity: [noun] The amount of water vapor in the air. (page 507) • Synonyms: Moisture; wetness; sweatiness • Antonyms: Dryness; aridity

  6. (3) Vapor Pressure • Sentence: When water molecules are added to dry air, there is an increase in air pressure. This increase is caused by vapor pressure. • Context Clues: Increase; pressure

  7. Vapor Pressure: [noun] The part of the total atmospheric pressure that is caused by water vapor. (page 507) • Synonyms: None. • Antonyms: None.

  8. (4) Condensation • Sentence: In cold weather, condensation forms on the kitchen window. • Context Clues: Cold weather; window

  9. Condensation: [noun] The change of state from a gas to a liquid. (page 509) • Synonyms: Water droplets; moisture • Antonyms: None.

  10. (5) Evaporate • Sentence: As a result of radiation, water evaporates from oceans and lakes. • Context Clues: Radiation; oceans; lakes

  11. Evaporate: [verb] To change from a liquid into a vapor or gas. • Synonyms: Dry up; vaporize • Antonyms: Condense

  12. (6) Dew Point • Sentence: The dew point depends on the levels of condensation and evaporation. • Context Clues: Condensation; evaporation

  13. Dew Point: [noun] The temperature at which the rate of condensation equals the rate of evaporation. (page 507) • Synonyms: None. • Antonyms: None.

  14. (7) Relative Humidity • Sentence: Relative humidity is a measure of how close the air is to the dew point. • Context Clues: Air; dew point

  15. Relative Humidity: [noun] The ratio of the amount of water vapor in the air to the amount of water vapor needed to reach the dew point. (page 507) • Synonyms: None. • Antonyms: None.

  16. (8) Precipitation • Sentence: The level of precipitation is highest during winter and fall; precipitation is usually low during summer. • Context Clues: Highest during winter and fall; low during summer

  17. Precipitation: [noun] Any form of water that falls to earth’s surface from the clouds. (page 510) • Synonyms: Rain; sleet; hail; snow; moisture. • Antonyms: None.