Ask students:
* When you are cold, what kinds of things or activities help you to stay warm?
* What helps you to stay warm when you are indoors? Outdoors?
* Is it usually warmer during the day or night? Why?
Now that students have been led to discover the heating role of the sun, ask questions like these to help them develop their benchmark-based focus and better prepare them for the activities in the body of the lesson:
- What is the sun? Where is it? (To keep answers simple: The sun is a giant star that is about 4.5 billion years old. It is also the largest object in the solar system.)
- What kinds of things does the sun do? (Answers will vary. Among other things, the sun provides the earth and its inhabitants the light and heat they need to grow and survive.)
- What kinds of things does the sun allow you to do every day? (Answers will vary.)
After taking time to field their responses, you and your students should be warming up in the sun.
- Do you think the water in the pan is cold, cool, warm, or hot? Why?
If I put this pan in the shade, do you think it would change the warmth of the water? Why or why not?
- How about if I took it inside and put it on my desk?
- When finished, have students touch the water one-by-one. (Make this activity as scientific as appropriate for your students.
As part of this discussion and review, have students ponder and answer questions like these:
- What would life be like if there were no sun?
- In what ways do plants and animals count on the sun?
- Why do people go swimming in lakes and oceans in the summer? Why not the winter?
- Why do people need air conditioners? What is life like for those who do not have or use them?
resources :
http://sciencenetlinks.com/search/?q=&grades=2&content_types=Lesson&csrfmiddlewaretoken=b332e0930183b1bb1f75776a923962e5
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