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.

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

To measure is to use equipment to find numbers to describe a feature of something such as its length, weight, size or time.

A table is a grid in which information can be recorded and stored.

Shadow size: do

Science

Light and seeing

Light sources

Protecting our eyes from the Sun: plan

Protecting our eyes from the Sun: do and review

Opaque, transparent and translucent

Making shadows

Shadow size: plan

Shadow size: review

Reflected light: plan

Reflected light: do and review

Light pollution (non-statutory)

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

The darkest shadows are formed when an opaque object blocks the light.

The darkest shadows are formed when a translucent object blocks the light.

The darkest shadows are formed when a transparent object blocks the light.

Which kind of material produces the darkest shadows?

Shadows change size if the light source is changed.

Shadows change size if an object is moved further away from a light source.

Which of these can be used to measure the size of a shadow?

What do scientists use to record the results of an investigation?

to help people understand the information

Why do scientists put a heading at the top of each column in a table?

Which of these is **not** a light source?

True or false? The size of a shadow changes depending on the size of the light source.

The distance between an object and a light source changes ...

by planning and carrying out an investigation

How can scientists find the answers to questions?

What do we call an investigation where only one thing is changed to find its effect on another thing that is measured, and all other things are kept the same?

Starter Quiz