Wonderful project about machines in primary education by three clever children.

2. A lever is a
rigid bar with
a support
called
fulcrum.We
use it to lift or
move some
objects.
We use a
wedge to
cut objects.
A
inclined
plane
move
odjects
up and
down
A screw
hold
things
together
or lift
objects.
A pulley
uses a
wheel
and a
rope to
lift or
lower
objects.
A wheel turns
around an
axel.We use it
to lift or move
objects.

3. Electrical appliences. Some of them use the energy
from batteries and some use solar energy.
Forms of transport.They use fuel like diesel and petrol
or human energy.
Robots at work . They do jobs that are dangerous for
people.they are quiker , more efficiant and safer to use.

4. 1.Handelbars.They
are levers that help
us change directions.
2. Pedals.They are
levers .They make the
wheel turn around
when we push them
with our feet.
THE
6.Brake
levers.They are
in the
handlebars
and are
connected to
the brakes
through cables.
3.Gears .They are
pulleys that help
us when we have
to go up or down
a hill.
BIKE
5. Brakes .They are
levers that help us slow
or stop the bike.They
are in the wheels.
.
4. Gear control.They
are levers in the
handlebars that are
connected to the
gears through
cables.

5. 1º .The first bicycles were made of wood.They had no pedals
and people used their feet to walk at the same time.
2º.A bicycle with pedals was invented .This bicycle had
metal tyres .
3º.A bicycle with a very big front wheel was invented.Its
tyres were made of solid rubber.
4º.Both wheels were the same size again , but the wheels
were still made of solid rubber.
5º.The first bicycle with air in its tyres was invented.

6. 3º
2º
1º

8. MADE BY:
RUBÉN MORENO.
ALEJANDRA RODRÍGUEZ.
GONZALO POLANCO.