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Target

Science Home Learning Task

Year 7

Light

Name

Tutor Group

Teacher

Given out: Tuesday 3 May

Hand in: Monday 9 May

Investigating Science

Welcome to your Science homework booklet. This booklet is designed to give you some

extra practise on the key areas in the “Light” section of the course.

You need to carry out tasks 1, 2, 3 and 4.

Then choose either the bronze, silver or gold task – go on, challenge yourself!

Don’t forget to fill in the last page and ask a parent/carer to sign the box on the front.

TASK 1- Light and the eye

Light is needed to help us to see objects. Answer the questions below about light.

1. Circle the correct bold word in the sentences below.

The Sun is luminous/non-luminous because it emits/transmits light.

The light reflects/transmits off an object that is luminous/non-luminous into

your eye so that you see it.

Most objects do not transmit light – they are translucent/opaque.

2. Match the following definitions to the correct keyword from the box below.

Definition Keyword

Gives out light

Does not allow light to travel

through it

Objects that you can see through

Light can pass through but it is

scattered as the object is frosted

Does not give out light

Light bounces off a surface

Light is taken into a material

Transparent Luminous Opaque Non-luminous

Translucent Absorbed Reflected

3. The diagram below shows a book that needs light to be seen. Draw lines and

arrows between the objects to show how the book can be seen.

4. How long does it take for light to travel from the Sun to the Earth?

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5. What is the speed of light?

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6. Can light travel through a vacuum? Explain your answer.

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7. The diagram below shows the inside of the eye. Label the parts of the eye using

the words in the box below.

What is the function of the different part of the eye? Find out and write your

answer in the space provided.

Pupil

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Lens Cornea Optic nerve Iris

Pupil Retina

Iris

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Retina

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Optic nerve __________________________________________________________________

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Lens

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8. How do all the different parts of the eye help us to see an image? Write a full

description of how the eye works in the space below. Use as many of the

keywords from the box as you can in your answer.

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Light Reflected Optic nerve Lens

Pupil Retina Image Inverted

TASK 2 - Reflection

1. Match the keyword to its meaning by drawing lines between them.

Plane

mirror

Virtual

image

Incident ray

Normal

Reflected ray

Line at 90˚ to the

mirror

An image that

appears to be inside

a mirror

A ray that comes

from a light source to

the mirror

A mirror with a flat

surface

A light ray that

bounces off a mirror

2. When light hits a surface such as a mirror, it bounces off the mirror – it is

reflected. When light is reflected in this way it follows a law known as the “law

of reflection”. The diagram below shows the “law of reflection”.

What is the “law of reflection”? Use the diagram above to help you.

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30˚ 30˚

3. Using the “law of reflection”, complete the table below.

Angle of incidence Angle of reflection

28˚

45˚

80˚

60˚

4. The diagrams below show what happens to light when it hits a smooth and a

rough surface. The lines on the diagrams show the rays of light.

Using the diagrams above, explain why the light rays are reflected differently

from a smooth and rough surface.

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Smooth surface Rough surface

TASK 3 – Refraction

Refraction is another property of light that happens when it travels from one medium to

another. For example from air to water. The diagram below shows what it looks like

when light is refracted.

1. Using the diagram above, explain what has happened to the light ray when it has

enetered the water.

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2. Look at the diagram below of light moving through a glass block. This shows

what happens to light when it travels through different materials.

a) On the diagram, mark the line that represents the normal. Also mark the angle

of incidence and the angle of reflection, the incident ray and the reflected

ray.

b) Using the diagram above, write an explanation for the change in the path of the

light. Include words from the box below in your answer. Hint: think speed.

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Glass block

Light Slows down Normal Speeds up

Glass Towards Particles Away from

3. How does a lens work? Complete the sentences below using the words from the

box.

We have a lens in each of our ________________. This is a ______________

lens. The job of this lens is to _______________ the ________________ so that

we can ___________. The point at which the rays cross is called the focus or the

_______________________________. The light is ______________________

as it goes into the lens and as it comes back out.

4. Using the information from above, complete the diagram below to show what

happens to the light as it passes through the lens.

Eyes Light Focus Refracted

Convex See Focal point

5. Fill in the blank spaces from the clues on the next page and then put the words

into the grid.

CLUES TO SOLVE

2 across Light travels in ___________________ lines.

11 across Incoming light is called the ___________________ ray.

1 down It strikes a _______________ between air and a glass block.

7 across At this point we draw the _____________ line

10 across at ___________ degrees to the glass surface.

4 across The air is one _____________ and the glass is the other.

3 down Travelling from air to glass, the light ray is bent or ______________

2 down because light travels _____________ in glass.

5 down The angle of ________________________ is

12 across _______________ than the

8 down

9 across of ______________________ and

6 across bends _____________ the normal.

TASK 4 – Colour

1. White light is made up of seven different colours of light. Using coloured pens or

pencils, show what happens to white light when it enters a prism.

Write a descrption below of what you have shown in your diagram.

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2. We can make all the colours of light using three colours. These are known as the

primary colours. Write down the three primary colours of light.

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The primary colours of light can be mixed to make the secondary colours.

On the diagram above colour the outer parts of the circles in the primary colours

and where they overlap, in the secondary colours that they make. If you don’t

have the correct colours, label your diagram instead.

Primary colour

Primary colour

Use the extra space below if you need to describe the detail/labels on your

diagram.

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3. Objects appear different colours because of the colour of light it reflects. Explain

why each object below looks the colour that it does in terms of the colour of light

it reflects.

a) Why does a black cat look black?

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b) Why does a piece of paper look white?

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c) Why does a strawberry look red?

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4. Coloured filters affect coloured light and the appearance of coloured objects.

Show the colour of light coming from the filter by colouring it in.

Write down the colour that you would see if the filter was blue instead of red.

Explain your answer.

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Complete the table below to show the colour a book would appear using the

different filters listed.

Colour of filter Colour of book Appearance of book in the light

blue blue

red blue

red yellow

red white

blue white

TASK 5 – Bronze, silver or gold? Complete one of the tasks below.

Bronze task

Quiz time. Make a quiz about “light” and ask someone at home to answer it. Use the

last page to show the quiz you made .

Silver task

How is the eye like a camera? Both the eye and a camera are designed to produce an

image. Find out how an eye and a camera are similar or different in the way they

produce an image. You can add diagrams too. Use the last page to show your findings.

Gold task

Lenses. When the lens in your eyes doesn’t work properly any more you can’t see very

well. Carry out research on either: conditions that can affect our eyes and ways that we

can correct them or carry out research into how glasses work to help us see better. You

can include some diagrams too. Use the last page to show what you have found out.

Blank page for bronze, silver or gold task

Extra space for the bronze, silver and gold tasks

Self Evaluation of my Homework

I am a R____________________ learner. I know this because:

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I believe that my effort and attitude to learning for this booklet is a:

1 2 3 4

I know this because:

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