2. Floating and

3. What does
floating and
sinking mean?
I think floating means that an
item is on or under the surface.
I think sinking means when an
item sinks all the way to the
bottom.

5. Questions

6. Questions
• How does an item float ?
• How does it sink?
• Does density make objects float?

8. • Density is in every type of object that has
any kind of material. High density objects
will sink and low density object will float.

9. Does density have the ability
to make an item float?
• Density is in every type of object that has
any kind of material. High density objects
will sink and low density object will float.

11. Diagram

12. Diagram
When we pushed the
balloon under the water,
the water pushed back.
This is called upthrust .

13. Diagram
The water rose when
we pushed the balloo
down.
When we pushed the
balloon under the water,
the water pushed back.
This is called upthrust .

14. Diagram
The water rose when
we pushed the balloo
down.
When we pushed the
balloon under the water,
the water pushed back.
This is called upthrust .
As we pushed the balloon under the water, some of the water pushed out of
the way. The water levels rose. This is called displacement

15. Diagram
The water rose when
we pushed the balloo
down.
The balloon floats
When we pushed the on the water
balloon under the water, because it is filled
the water pushed back.
This is called upthrust . with air.
As we pushed the balloon under the water, some of the water pushed out of
the way. The water levels rose. This is called displacement

17. • First we cracked the egg
and tipped the yolk out.
Then we tipped the first
egg white in to see if it
floated. It didn’t. Then
you whisk the the other
egg white and pour it in
the water. It will float
because we have added
air.

18. Trapped air
• First we cracked the egg
and tipped the yolk out.
Then we tipped the first
egg white in to see if it
floated. It didn’t. Then
you whisk the the other
egg white and pour it in
the water. It will float
because we have added
air.

19. Trapped air
• First we cracked the egg
and tipped the yolk out.
Then we tipped the first
egg white in to see if it
floated. It didn’t. Then
you whisk the the other
egg white and pour it in
the water. It will float
because we have added
air.

20. Changing an object’s shape
If you change an object’s shape and make it
hollow it will float. A flat dense object will
sink, but if it’s flat it will actually sink.

21. Credits
Thanks to Mrs van Zyl
I