science lesson

1. 1

2. Ch.9, Lesson 2
Forces
• Objectives:
• 1-Explore forces and how we
use to move things.
• 2-Explore gravity and how it is
always pulling on us.
• 3-Identify weight.
Vocabulary:
Forces
Gravity
weight
2

3. Ch.9, Lesson 2
Forces
What are Pushes and Pulls?
Vocabulary:
Forces
Gravity
weight
3

4. Ch.9, Lesson 2
Forces
Facts about forces:
All pushes and pulls are
forces.
Pushes move away from you
Pulls move toward you.
Vocabulary:
Forces
Gravity
weight
4
1

5. Ch.9, Lesson 2
Forces
Forces may change the
motion of an object.
it can make object:
 Start moving
 Stop moving
 Change direction
The heavier an object the
more force you need to move
it.
Vocabulary:
Forces
Gravity
weight
5
2

6. Ch.9, Lesson 2
Forces
Vocabulary:
Forces
Gravity
weight
6
No matter how hard you push,
you can’t push over a brick wall.
• {It is easier to push an
empty shopping cart than
to push a full one}

7. Ch.9, Lesson 2
Forces
Forces work in pairs.
• Whenever you push or pull
on something, it pushes or
pulls on you.
• The push or pull that you
feel is a force in the
opposite direction.
Vocabulary:
Forces
Gravity
weight
7
3

8. Ch.9, Lesson 2
Forces
• Many things can create
forces.
• Some forces push or pull on
objects without even
touching them.
Vocabulary:
Forces
Gravity
weight
8
4

9. Ch.9, Lesson 2
Forces
What force is always pulling
on you?
There is force everywhere on
Earth.
It’s even pulling on you right
now.
Is a pulling force between
two objects. such as you and
Earth.
This force keep objects
pulled toward Earth.
Vocabulary:
Forces
Gravity
weight
9
Gravity

10. Ch.9, Lesson 2
Forces
What is Weight?
The pull of gravity is just
about the same all over
Earth.
Is how much pull gravity has
on an object.
* That means an object’s
weight will be the same any
where on Earth but, on other
planets and Moon the gravity
is different so the
object’s weight is different.
Vocabulary:
Forces
Gravity
weight
10
Weight

11. Ch.9, Lesson 2
Forces
• You can find out how heavy
or light things are by
measuring their weight.
• Some objects are heavy
and some are light.
Vocabulary:
Forces
Gravity
weight
11

12. Ch.9, Lesson 2
Forces
Scientists measure weight in
newtons.
Is the unit of force in metric
system.
In the English system of
measurement, the unit is the
pound.
Vocabulary:
Forces
Gravity
weight
12
newtons.

13. Ch.9, Lesson 2
Forces
• Check for understanding:
1-What is force?
2-Do you need more or less
force to move heavier object?
3-When you jump up, why do
you come down?
4-Would you weight the
same amount on the Moon?
Vocabulary:
Forces
Gravity
weight
13