1. Suddenly, Tortoise
sees some paper on
the floor. He has a
new great idea.
WHAT DO YOU
THINK IS
TORTOISE’S IDEA?
He sets to work
and he has a
beautiful new
colorful paper
shell. Tortoise is
happy but…

2. Unfortunately, the wind starts to blow and
Tortoise paper shell blows away.
WHY ?
WHAT DO YOU
THINK IS GOING
TO HAPPEN?
Tortoise has another idea. He makes a shell with
wooden sticks. He thinks it is stronger, but…

3. Tortoise walks near a
fire and the wooden
shell gets burnt.
Tortoise is not very
happy but he has
another idea:
He starts to knit a
fantastic warm wool
shell.
WHAT DO YOU
THINK IS IT THE
PERFECT
SHELL?

4. Tortoise feels warm
with his new shell but
he walks near a rose
bush and his lovely
warm wool shell begins
to unravel.
Tortoise is very angry
when he has a new idea.
He makes a rubber-
plastic shell.
ARE RUBBER
AND PLASTIC
GOOD
MATERIALS FOR
HIS NEW
SHELL?

5. PROPERTIES 4&5 : WOOL and PLASTIC/RUBBER PREDICTION
APPEARANCE Shiny Dull
TRANSPARENCY Opaque Transparent
STRENGTH Hard Soft
FLEXIBILITY Elastic Plastic
HEAT CONDUCTIVITY Conductor Insulator
PERMEABILITY Waterproof Absorbent
FLAMMABILITY Flammable Inflammable