Grade 4 Science
MUSCLES
AND
MOVEMENT
LEARNING OBJECTIVES
At the end of the lesson, students should be able to:
1
2
Know that bones
move because pairs
of muscles
Describe the importance
of movement in
maintaining human health
MUSCLES
Muscles are vital tissues in
our bodies that enable
movement by contracting
(shortening) and relaxing
(lengthening). They pull on
our bones, allowing us to
perform various activities
like walking, running, and
lifting.
MUSCLES
When you decide to move,
your brain sends signals to
the skeletal muscles, which
are attached to your bones.
For example, to raise your
arm, the muscles in your arm
contract, pulling on the
bones to lift it.
MUSCLES MAKE US MOVE
Bones are strong and hard.
They cannot bend, but your
body can move in many ways.
Muscles always work in pairs.
One muscle contracts and pulls
on the bone it is joined to. This
makes the bone move. The other
muscle relaxes.
MUSCLES MAKE US MOVE
We use our muscles to move in
different ways. We can walk, run,
dance, lift things, climb and jump.
Movement is good for our bodies.
Sitting still for a long time is not
good for our bodies.
Movement helps to keep us healthy
in different ways.
THANK
YOU!
I hope you learn something
new today!