Whatsthatinthesky.pptVIP

* What’s that in the sky? ?? 长春外国语学校 田静 Pre-reading Do you know how the sun changes its position in the sky? How do you know it? Have you ever paid attention to shadows? How does your own shadow change? 1 2 3 4 Learn How the Sun Changes Its Position in the Sky To learn how the sun changes its position in the sky, you don’t have to zoom into space on Shenzhou VI. Try this small experiment at school. Then you’ll understand what happens in the sky. Just follow these steps: ? 1. Starting today at noon, measure the length of a shadow of a fixed object, like a flagpole. ? 2. At noon tomorrow, measure the same shadow again. ? 3. Go on measuring the shadow each day at noon for a couple of weeks. If you can’t measure one day for some reason, it’s OK to put off measuring till tomorrow. ? 4. Are your measurements the same each day or do they differ? ? 5. If the shadow gets longer each day, does that mean that the sun is higher or lower in the sky? ? If you want the result to speak for itself, be sure to make your measurements at the same time each day. Noon is the best, but other times will work too. While-reading Read the story . Then choose A or B Do we have to zoom into space if we want to know the position of the sun? ________ A. Yes, you do. B. No, you don’t. 2. Must you measure the same object? ________ A. Yes, you must. B. No you needn’t. Can you miss a day measuring the shadow? ________ A. Yes, you can. B. No, you can’t. B A A 4. What’s the meaning of “put off ” ? ________ A. 脱下 B.延期 5. We should make our measurements ________. A. at different times B. at always the same time 6. Is noon the best time for measuring the shadow? ________ A. Yes, it is. B. No, it isn’t. Read the story . Then choose A or B B B B Words and expressions: zoom v. 急升，猛涨，急速移动。 zoom into space; zoom along the motor