WALA: WHICH MATERIALS LET LIGHT PASS THROUGH

WALA: WHICH MATERIALS LET LIGHT PASS THROUGH

L.O: to explore how opaque materials do not let light pass through and transparent materials let light pass through.

Review

Review the previous lesson through oral questions.

Ask what are opaque, transparent and translucent materials.

Shadow shades

Transparent materials give shade 1 or no shadow.

Opaque materials give shade 5 or total shadow.

Translucent materials give partial shadows with shade 2,3 or 4.

Activity

What you need

1. strong light

2. screen

3. six objects made of different materials

What to do

1. Predict the amount of shadow each material will produce when you shine a light.

2. Use the shade key 1-5.

Which materials will be opaque? transparent? translucent?

Plan and carry out a fair test. present your results in a bar chart.

use this work sheet to collect information

use this work sheet to draw the graph

Plenary

SCIENCE ACTIVITY BOOK H/WORK PAGE 39 AND 40.

Go through the work with students as you emphasis the use of a graph.