A material is what an object is made from. An object can be made from more than one material.

To classify is to sort objects into groups.

Light cannot pass through objects that are opaque.

Transparent materials are completely see-through.

Translucent materials allow some light to pass through but are not completely see-through.

Opaque, transparent and translucent

Science

In this Introduction to light and shadows unit, pupils learn that we need light in order to see and that light is reflected from surfaces. In the Light and how it travels unit, they will build on this knowledge to learn that objects are seen because they give out or reflect light into the eye

In the Everyday materials unit, pupils became familiar with the names of common materials and properties such as opaque and transparent. In this Introduction to light and shadows unit, pupils will build on this knowledge to recognise that shadows are formed when light is blocked by an opaque object

This unit explores the nature of light, recognising that light is needed to see and that dark is the absence of light. It covers how light reflects and shadow formation. The unit emphasises practical tests, observations, accurate measuring, and using evidence to support findings.

Introduction to light and shadows

Physical activity and equipment requiring safe use

When we classify materials, what do we do?

Which of these objects is made from an opaque material?

We can see objects clearly through transparent materials.

We can see objects through transparent materials but not clearly.

We cannot see objects through transparent materials.

Which of these statements about transparent materials is true?

Which image shows an object made from a translucent material?

No, we cannot see through translucent materials.

Yes, but we cannot see objects clearly through translucent materials.

Yes, we can see objects clearly through translucent materials.

Can objects be seen through translucent materials?

What material is the see-through part of a window made from?

Which of these objects is made from a material that won't let light through?

Materials that we can see through are good for making ...

Materials that don't let any light through are useful for making ...

When we put materials into groups, which science skill are we using?

Content guidance

Exploration of objects

Adult supervision recommended

Introduction

What will you need for this lesson?

Are you ready to learn?

Equipment

Content guidance

Supervision

Worksheet