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Water in the Atmosphere

Water in the Atmosphere. Chapter 6 Section 1. Standard. S 6.4 a Students know the sun is the major source of energy for phenomena on Earth’s surface; it powers winds, ocean currents and the water cycle. . Anticipatory Set. Go Outside and try to identify the clouds you see outside.

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Water in the Atmosphere

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  1. Water in the Atmosphere Chapter 6 Section 1

  2. Standard • S 6.4 a Students know the sun is the major source of energy for phenomena on Earth’s surface; it powers winds, ocean currents and the water cycle.

  3. Anticipatory Set • Go Outside and try to identify the clouds you see outside. • Take the map we created last week to help you. • Have a discussion as to which stratosphere the clouds you see are located

  4. Language of the Discipline • Water Cycle • Evaporation • Humidity • Relative humidity • Psychomotor • Condensation • Dew point • Cirrus • Cumulus • Stratus

  5. Water in the Atmosphere • Water cycle is the continuous movement of water between the atmosphere and Earth’s surface • Sun’s energy is the power to the water cycle • Has no real beginning or end • Water vapor is added to the air by living things • Plant roots, leaves and releases it as water vapor

  6. Humidity • The measure of the amount of water vapor in the air • Relative Humidity • The percent of water vapor that is actually in the air compared to the amount of water vapor the air can hold at a specific temperature • Relative humidity can be measured with an instrument called a psychomotor. • Psychrometer wet bulb/dry bulb thermometer

  7. How Clouds Form • Clouds form when water vapor in the air condense to form liquid water or ice crystals. • Role of Cooling • Cold air holds less water vapor • As air cools, it holds less and forms tiny drops of water • Dew point- temperature at which condensation begins • If dew point is below freezing then it changes into ice crystals.

  8. Particles • For water vapor to condense, tiny particles must be present so the water has a surface on which to condense • Blades of grass • Window panes • Dew • Can you thing of anything else that has dew on it?

  9. Types of Clouds • Cirrus- Wispy, feathery clouds (like the curl of a hair) • Made of ice crystals • Looks like rows of cotton balls • Indicates a storm is on it’s way • Looks like scales of fish

  10. Cumulus Clouds • Fluffy, round piles of cotton • Heap or mass of clouds • Not very tall • Indicate • Common on sunny days

  11. Stratus Clouds • Spread out clouds • Covers all or most of the sky • Uniform dull, gray in color • As they thicken, they produce rain, drizzle or snow

  12. Clouds • Part of a clouds name is based on it’s height • Altocumulus • Altostratus • “Middle level” clouds • Alto- “high”

  13. Fog • Clouds that form at or near the ground • When the ground cools at night after a warm day • Heat from the next day “burns” the fog off and it evaporates • Common near bodies of water or marshy areas

  14. Checking for Understanding • What instrument measures relative humidity? • What 2 factors are required for condensation to occur? • What are stratus clouds?

  15. Guided PracticeIndependent Practice • Worksheet # 1-5 for Guided Practice • Stop! Have work checked • Independent Practice • Workbook pages

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