A shadow is formed when an object blocks light.

Something that is a light source produces its own light.

To cast a shadow is to block light and cause a shadow.

A prediction is a statement saying what you think will happen.

The position of shadows (non-statutory)

Science

In the Light and how it travels unit, pupils learn that light travels in straight lines and how objects are seen. In the Sound, light and vision unit, they will build on this knowledge to learn more about how light is reflected off mirrors, and how the eye can see objects by the light they reflect

In the Introduction to Light and shadows unit, pupils learnt that shadows are formed when the light from a light source is blocked by an opaque object. In this Light and how it travels unit,  pupils will build on this knowledge to use the idea that light travels in straight lines to explain why shadows have the same shape as the objects that cast them

This unit explores how light travels in straight lines, explaining how we see objects and why shadows form the shape of the object casting them. It focuses on planning scientific enquiries, taking precise measurements, making predictions, and evaluating evidence to present findings.

Light and how it travels

Physical activity and equipment requiring safe use

Activity that requires collection of items from an area (room, building).

A shadow is a dark shape made when {{}} is stopped or blocked by an object.

The position of a shadow depends on the {{}} of the light source. 

Which of these diagrams shows the correct position of the shadow?

A shadow will be cast on the {{}} side of an object to the light source where the light source cannot shine.

Scientists use the {{}} of their tests to make predictions and set up further enquiries.

Which of these diagrams shows the correct position of the light source shown by the X?

Why are mirrors often used to investigate light?

Laura: "shadows are the same size as the object blocking the light"

Jun: "shadows are the same shape as the object blocking the light"

Sofia: "shadows show the features of the object blocking the light"

Which image shows the correct shape shadow?

Which of these types of materials would not cast a shadow?

Shadows are the same shape as the object blocking the light because light travels in {{}} lines.

They can help show the colour of the light source.

They can help show where the light is blocked.

They can help show the type of light source used.

How can scientific diagrams help us understand the shape of shadows?

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