Build Background: Ask: What words describe today's weather? What other weather conditions have you heard about or experienced? Where have you seen or heard about frost? What IS frost?
2. Explore more about how bird wings help them fly with How Birds Fly. What have builders of ultralights and other "flying machines" learned from the first fliers: birds?
Make Connections: Think of a time when you had to invent a solution to a problem. How did you solve your problem in a way you hadn't tried before? What did you discover from the results?
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