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What is weather?

Learn about the present state of the atmosphere, the water cycle, and how clouds are formed. Explore the causes of weather phenomena like evaporation, precipitation, humidity, lightning, and thunder. Discover the importance of temperature, wind, and humidity in determining sky conditions. Cobb Curriculum Standards: S4E3c, S4E3d, S4E3e.

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What is weather?

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  1. What is weather? The present state of the atmosphere Tidal patterns A measure of how clean the air is

  2. What causes water to evaporate in the air? • A. Heat from the moon • B. Cold winds over the ocean • C. Heat from the sun

  3. How does cold air hold water? • Water molecules fit into spaces between air molecules • Water is filtered into an invisible tube • The ozone layer holds our water

  4. Humidity changes depending on • Clouds • Wind • Temperature

  5. Humidity changes depending upon: • Clouds • Wind • Temperature

  6. Which of these air temperatures can hold the most water? • Warm air • Cool air • Freezing cold air

  7. When are air molecules moving their slowest? • At colder temperatures • At warmer temperatures • When it’s dark outside

  8. What do you call it when water vapor molecules join together? • Compilation • Condensation • Concentration

  9. The dew point is the temperature at which: • The air is fully saturated with water vapor. • Plants conduct photosynthesis. • The clouds are ready to produce rain.

  10. What does it mean if the relative humidity is 100%? • There is no water vapor in the air. • The air is partly full of water vapor. • The air is totally full of water vapor.

  11. When do storm clouds develop? • When humid air rises and cools, so that the moisture inside condenses • When space dust floats into our atmosphere • When Zeus is angry

  12. What causes lightning? • An electrical outlet • Large amounts of rain • Differences in electrical charge inside a cloud

  13. How hot is lightning? • 30,000 degrees Celsius • 3,000 degrees Celsius • 300 degrees Celsius

  14. Which of these do you always observe first? • Thunder • Lightning • Neither—they happen at the same time

  15. What is the period of time between the lightning and thunder called? • The flash-to-bang time • The bang-to-flash time • Naptime

  16. What causes thunder? • Humid air turning into precipitation too quickly • Clouds falling from the sky • Rapid expansion of air due to the heat of lightning

  17. When the flash-to-bang time is under 3 seconds, what should you do? • Head for shelter • Put on your raincoat • Do a rain dance

  18. If you are not close to shelter, what should you do then? • Climb a tree • Crouch low to the ground in an open space • Jump into the swimming pool

  19. What’s the safest sport to play during a thunderstorm? • Golf • Water polo • Ping pong, indoors!

  20. Who is famous for performing a dangerous lightning experiment? • Isaac Newton • Benjamin Franklin • Thomas Edison

  21. Cobb Curriculum Standards • Element: S4E3c Cloud Formation • Investigate how clouds are formed. • Element: S4E3d Water Cycle • Explain the water cycle (evaporation, condensation, and precipitation). • Element: S4E3e Precipitation and Sky Conditions • Investigate different forms of precipitation and sky conditions (rain, snow, sleet, hail, coulds, and fog).

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