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Quick Write (Write in your Interactive Notebook.)

Learn about the causes of seasons and the varying hours of daylight throughout the year. Explore the longest and shortest days and understand the global differences in daylight. Read "Wendy and Her Worldwide Weather Watchers" for more insights.

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Quick Write (Write in your Interactive Notebook.)

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Presentation Transcript

  1. Quick Write(Write in your Interactive Notebook.) What causes seasons?

  2. December 21 Shortest Day • Do we have fewer than 24 hours? • Fewer hours of sunshine • Light + dark hours = 24 Why would someone say that?

  3. Longest Day? • If it’s true that there is a shortest day, is there also a longest day of the year? • Yes, June 21

  4. Today’s Sunlight How many hours of sunlight will we have today? Example: Sunrise 6:24 a.m. Sunset 6:44 p.m. Calculate the amount of sunlight.

  5. Table is the sunrise and sunset times Times were recorded on the 21st each month Sunrise/Sunset Time for 2000

  6. Hours of Daylight • Calculate the hours and minutes of daylight on the 21st of each month. • Make a bar graph to show the amount of daylight month by month.

  7. Copy the hours of daylight Make a bar graph to show the amount of daylight month by month Remember that 60 minutes = 1 hour Hours of Daylight

  8. Review the Graph

  9. Review the Graph The amount of daylight over a year in Berkeley?

  10. Review the Graph Days get longer - Jan to Jun Days get shorter - Jun to Dec

  11. Review the Graph Longest Day? Shortest Day?

  12. Review the Graph 12 hours of daylight?

  13. Review the Graph How many hours of sunlight on the longest day? More than 14 hours

  14. Review the Graph How many hours of sunlight on the shortest day? More than 9 hours

  15. Sunlight & Seasons • What season is the longest day? • What season is the shortest day?

  16. Global Daylight • When one location on Earth has 14 hours of daylight, is all the rest of the world having 14 hours of daylight as well? • Is the longest day of the year the same length? • Is the longest day of the year the same day?

  17. Global Daylight • Are the longest days always in the summer? • Are the shortest days always in the winter?

  18. Reading • Turn to pg 12 • Read “Wendy and Her Worldwide Weather Watchers”. • Answer the Think Questions on page 16.

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