Travelling+Light

Describe how light travels. Explain how we see things. Explain how shadows are formed. Recall that light travels at a very high speed.
 * Objectives (what you will learn this lesson**


 * Starter**
 * Complete and mark the quick quiz
 * Traffic light the first column on your target sheet (red = I can't do this, yellow = I can do this a little, but I'm not sure, green = I can confidently answer questions on this)


 * Activities**
 * 1) Laser light and the milky fish tank demonstration. How fast and in what direction does light travel?
 * 2) Read p148-9 of Exploring Science 8 and answer Q1, 2, 6
 * 3) Use your raybox to make shadows of different objects. Now try to change the shape of the shadows.
 * 4) Design your own investigation based on the information in [|Investigating shadows] worksheet and carry it out. Draw a graph of your results (remember the advice on Drawing effective graphs).
 * 5) Watch the video on thunderstorms (below) and complete the worksheet on [|Speeding light]
 * 6) Extension: If light is so fast how can we measure it's speed? Read the worksheet on [|More light measurements] and answer the questions in your exercise book

Review completed classwork / key term quiz
 * Summary**

Thunderstorms - what travels more quickly, light or sound? media type="file" key="ES8_Ka149_13vvv.flv" width="360" height="270"
 * Videos**

Answer the questions on [|Explaining laser light]. Either print the worksheet and answer questions in your book or answer on the worksheet, print and paste into your exercise book.
 * Homework**