Lesson 1: The pathway of light

Before starting this unit, check the children can recall some of the following key facts from the units Science, Year 3, Energy: Light and shadows and Science, Year 5, Materials: Properties and changes:

• Sources of light are those that give out light.

• Light is needed to see things.

• Dark is the absence of light.

• Light from the sun can be dangerous, and the eyes need protection.

• Opaque materials block or absorb all light, preventing objects on the other side from being seen.

• Translucent materials allow some light to pass through but scatter it, causing objects on the other side to appear fuzzy or distorted if visible.

• Transparent materials allow light to pass through with minimal scattering or reflection so objects on the other side are clearly visible.

• Shadows are formed when an opaque object blocks the light from a light source.

• Shadows change position and length throughout the day as the sun changes position in the sky.

Use the Activity: Recap and recall: Light and reflection mind map (one each) if needed.