glass exploring the science of everyday materials

Glass
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All rights reserved
Text copyright © 1999 Nicola Edwards and Jane Harris
Photographs copyright © 1999 Julian Cornish-Trestrail
No part of this book may be reproduced or transmitted
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information storage and retrieval system, without
permission in writing from the publisher.
e-ISBN 1-59019-863-8
Library of Congress Cataloging-in-Publication Data is available
ISBN 0-7136-5066-4
Exploring the science
of everyday materials
Nicola Edwards and
Jane Harris
Photographs by
Julian Cornish-Trestrail
2
Glass is made in a factory.
Lots of things are made
of glass.
We’ve collected
all these!
3

Windows
are made of
glass, too!
4
This special, tough
piece of glass is
like a window.
I can see
right through it.
The walls of this
building are
made of glass.
The glass lets
a lot of light
through.
Mirrors are
made of glass,
too.
6
I’ve found a glass marble.
It feels round
and smooth
and cool.
7
This  at glass feels
smooth and hard.
Your nose
has gone all
squashy!
This paperweight is

made of thick glass.
It feels heavy.
9
Look at this glass vase.
The sides are
so delicate.
10
Don‛t drop that!
It‛ll smash into pieces.
I know – I‛m
holding it very
carefully.
Broken glass is
very sharp.
11
What will happen to
this marble if I drop it?
I know – I‛m
holding it very
carefully.
Broken glass is
very sharp.
It didn’t smash.
I saw it bounce!
When glass is being
made in a factory, it‛s very
hot and soft.
It can be
turned into lots of
different shapes.

13
But something that’s made
of glass doesn’t change
its shape.
Unless it gets
broken or melted down
in a factory.
14
I’ve dropped some water
on to this piece of glass.
The water sits on top of the glass.
It doesn’t soak through.
I wonder what will happen if I drop
a marble into this tank of water.
It sinks to
the bottom.
Will all these things
made of glass sink too?
Let‛s try them out.
This magnifying glass makes
things look bigger.
I can see things
better when I‛m
wearing my glasses.
17
Binoculars have magnifying glasses
in them to make things look nearer.
How many
 ngers am I
holding up?

One…two…
three…FOUR!
In my Gran‛s garden
there‛s a greenhouse
made of glass. Gran grows
tomato plants and
 owers in it.
19
In the summer,
Gran lets me pick
the tomatoes.
It feels hot
inside the greenhouse.
It‛s more comfortable
in the fresh air.
20
Glass can be beautiful.
Look at this glass
ornament. It has
been made to look
like a shell.
There are so many
colours in this paperweight.
I can see blue, green,
black and white.
22
Time to tidy away.
Let‛s sort these
out into clear, green
and brown glass for

the bottle bank.
23
We’ve collected all
these bottles and jars
for recycling.
The glass can be
taken back to a factory
to be melted down
and used again.