A shadow is a dark shape that is formed when an object blocks a source of light.

Something that is a light source produces its own light.

An object is something you can touch but something that is not usually a living thing.

Distance is how far away something is or how far an object has travelled.

Shadow size: plan

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

Shadows are formed when water is blocked by an object.

Shadows are formed when light is blocked by an object.

Shadows are formed when heat is blocked by an object.

True or false? The size of a shadow does **not **change.

the distance of the object from the light source.

The size of a shadow changes depending on ...

 involves changing one thing and measuring another.

A dark shape is formed between the light source and the object.

A dark shape is formed on the other side of the light source.

A dark shape is formed on the other side of the object. 

What happens when light falls on some objects?

A dark shape that is formed when an object blocks light.

A dark shape that is formed when an object blocks heat.

A dark shape that is formed when an object blocks water.

Opaque materials allow all light to pass through them.

Opaque materials allow some light to pass through them.

Opaque materials do not allow light to pass through them.

A light source is something that produces its own food.

A light source is something that produces its own light.

A light source is something that produces its own heat.

The shape of a shadow depends on the {{}} of the object.

Which of these images shows the shadow of a mug?

Content guidance

Exploration of objects

Adult supervision recommended

This lesson will be removed by end of Summer Term 2025.

Shadow size: plan

Lesson outcome

Content guidance

This lesson will be removed by end of Summer Term 2025.