Materials that Float and Sink

Jun 10, 201726 likes45,091 views

The document discusses the factors that influence whether an object will float or sink in water. It explains that an object's density determines if it is more or less dense than water, and the denser object will sink while the less dense object will float. An object's shape can also impact its ability to float, as a larger surface area increases the upthrust force pushing it up. In conclusion, for an object to float it must be less dense than water or have a shape that increases upthrust, while sinking occurs when an object is denser than water.

Marie Jaja T. Roa Santa Maria West Central School Schools Division of Ilocos Sur
Lesson 1

Marie Jaja T. Roa Santa Maria West Central School Schools Division of Ilocos Sur
I have here two different kinds of
balls. Which ball do you think
will float and which will sink?

Marie Jaja T. Roa Santa Maria West Central School Schools Division of Ilocos Sur
Sink means to go below the surface of the water.
Float means to stay above the surface of the water.

Marie Jaja T. Roa Santa Maria West Central School Schools Division of Ilocos Sur
Have you ever
wondered why
some object sinks on
water, while some
object floats?

Marie Jaja T. Roa Santa Maria West Central School Schools Division of Ilocos Sur
Float
Sink
Descriptive
words for
objects that
float and
objects that
sink.

Marie Jaja T. Roa Santa Maria West Central School Schools Division of Ilocos Sur
Rocks in a river.
Ice in a drink.
Some things float.
Some things sink.
Floating things
have buoyancy
Test a little
toy and see
Does it sink?
Does it float?
Could you use it
as a boat?
Try a pencil.
It pop up.
Try a hammer.
Try a cup.

Marie Jaja T. Roa Santa Maria West Central School Schools Division of Ilocos Sur
Test some objects
in your bath.
Watch them.
Now you’re
doing Math
If something
is denser than the water
it will sink
But if the water’s
denser, then…
Well,
What do you think?
©Amy LV

Marie Jaja T. Roa Santa Maria West Central School Schools Division of Ilocos Sur

Marie Jaja T. Roa Santa Maria West Central School Schools Division of Ilocos Sur
Well, it’s all
about something
called density.
What causes objects to
sink and float?
Density is the degree of
compactness as of an object.

Marie Jaja T. Roa Santa Maria West Central School Schools Division of Ilocos Sur
Everything is made of molecules.
Molecules are tiny particles
that can be seen with a
microscope.

Marie Jaja T. Roa Santa Maria West Central School Schools Division of Ilocos Sur
Tightly packed molecules
in an object
Loosely packed
molecules in an object

Marie Jaja T. Roa Santa Maria West Central School Schools Division of Ilocos Sur
Objects with tightly packed molecules will sink if it is
more dense than the liquid it is immersed in.

Marie Jaja T. Roa Santa Maria West Central School Schools Division of Ilocos Sur
Objects with loosely
packed molecules will
float if it’s less dense
than the liquid it is
placed in.

Marie Jaja T. Roa Santa Maria West Central School Schools Division of Ilocos Sur
REMEMBER: Materials with a
density less than that of a liquid
float and materials with a greater
density than the liquid sink.

Marie Jaja T. Roa Santa Maria West Central School Schools Division of Ilocos Sur
Does the shape of an object
affects its ability to float?

Marie Jaja T. Roa Santa Maria West Central School Schools Division of Ilocos Sur
Changing the objects shape will also make its
ability to float because it holds air and
upthrusts has more space to push the object.

Marie Jaja T. Roa Santa Maria West Central School Schools Division of Ilocos Sur
Upthrust is the force that pushes an object up
and makes it seem to lose weight in a liquid.
It is a push that always goes straight UP,
against the direction of gravity.

Marie Jaja T. Roa Santa Maria West Central School Schools Division of Ilocos Sur
Upthrust is the force which is responsible in
making an object float or sink in a liquid.

Marie Jaja T. Roa Santa Maria West Central School Schools Division of Ilocos Sur
Imagine trying to hold this beach ball and this
tennis ball, under the water. Which would be
easier to hold underwater? Why?

Marie Jaja T. Roa Santa Maria West Central School Schools Division of Ilocos Sur
REMEMBER:
Shape affects upthrust. The larger
the surface area of an object, the
stronger the upthrust.

Marie Jaja T. Roa Santa Maria West Central School Schools Division of Ilocos Sur
Factors Affecting
Sinking or Floating
of Objects
Density or
compactness of
an object
The
material
it is
made of
Weight of
an object
Shape or
form of
an object
Type of
liquid

Marie Jaja T. Roa Santa Maria West Central School Schools Division of Ilocos Sur
Float means to stay above the surface of the
water.
Sink means to go below the surface of the water.
Buoyancy is the tendency of an object to float in
liquid.
Density is the degree of compactness of an object.
Upthrust is the force that pushes an object up in a
liquid.

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Materials that Float and Sink

1. Marie Jaja T. Roa Santa Maria West Central School Schools Division of Ilocos Sur Lesson 1

2. Marie Jaja T. Roa Santa Maria West Central School Schools Division of Ilocos Sur I have here two different kinds of balls. Which ball do you think will float and which will sink?

3. Marie Jaja T. Roa Santa Maria West Central School Schools Division of Ilocos Sur Sink means to go below the surface of the water. Float means to stay above the surface of the water.

4. Marie Jaja T. Roa Santa Maria West Central School Schools Division of Ilocos Sur Have you ever wondered why some object sinks on water, while some object floats?

5. Marie Jaja T. Roa Santa Maria West Central School Schools Division of Ilocos Sur Float Sink Descriptive words for objects that float and objects that sink.

6. Marie Jaja T. Roa Santa Maria West Central School Schools Division of Ilocos Sur Rocks in a river. Ice in a drink. Some things float. Some things sink. Floating things have buoyancy Test a little toy and see Does it sink? Does it float? Could you use it as a boat? Try a pencil. It pop up. Try a hammer. Try a cup.

7. Marie Jaja T. Roa Santa Maria West Central School Schools Division of Ilocos Sur Test some objects in your bath. Watch them. Now you’re doing Math If something is denser than the water it will sink But if the water’s denser, then… Well, What do you think? ©Amy LV

8. Marie Jaja T. Roa Santa Maria West Central School Schools Division of Ilocos Sur

9. Marie Jaja T. Roa Santa Maria West Central School Schools Division of Ilocos Sur Well, it’s all about something called density. What causes objects to sink and float? Density is the degree of compactness as of an object.

10. Marie Jaja T. Roa Santa Maria West Central School Schools Division of Ilocos Sur Everything is made of molecules. Molecules are tiny particles that can be seen with a microscope.

11. Marie Jaja T. Roa Santa Maria West Central School Schools Division of Ilocos Sur Tightly packed molecules in an object Loosely packed molecules in an object

12. Marie Jaja T. Roa Santa Maria West Central School Schools Division of Ilocos Sur Objects with tightly packed molecules will sink if it is more dense than the liquid it is immersed in.

13. Marie Jaja T. Roa Santa Maria West Central School Schools Division of Ilocos Sur Objects with loosely packed molecules will float if it’s less dense than the liquid it is placed in.

14. Marie Jaja T. Roa Santa Maria West Central School Schools Division of Ilocos Sur REMEMBER: Materials with a density less than that of a liquid float and materials with a greater density than the liquid sink.

15. Marie Jaja T. Roa Santa Maria West Central School Schools Division of Ilocos Sur Does the shape of an object affects its ability to float?

16. Marie Jaja T. Roa Santa Maria West Central School Schools Division of Ilocos Sur Changing the objects shape will also make its ability to float because it holds air and upthrusts has more space to push the object.

17. Marie Jaja T. Roa Santa Maria West Central School Schools Division of Ilocos Sur Upthrust is the force that pushes an object up and makes it seem to lose weight in a liquid. It is a push that always goes straight UP, against the direction of gravity.

18. Marie Jaja T. Roa Santa Maria West Central School Schools Division of Ilocos Sur Upthrust is the force which is responsible in making an object float or sink in a liquid.

19. Marie Jaja T. Roa Santa Maria West Central School Schools Division of Ilocos Sur Imagine trying to hold this beach ball and this tennis ball, under the water. Which would be easier to hold underwater? Why?

20. Marie Jaja T. Roa Santa Maria West Central School Schools Division of Ilocos Sur REMEMBER: Shape affects upthrust. The larger the surface area of an object, the stronger the upthrust.

21. Marie Jaja T. Roa Santa Maria West Central School Schools Division of Ilocos Sur Factors Affecting Sinking or Floating of Objects Density or compactness of an object The material it is made of Weight of an object Shape or form of an object Type of liquid

22. Marie Jaja T. Roa Santa Maria West Central School Schools Division of Ilocos Sur Float means to stay above the surface of the water. Sink means to go below the surface of the water. Buoyancy is the tendency of an object to float in liquid. Density is the degree of compactness of an object. Upthrust is the force that pushes an object up in a liquid.

23. Marie Jaja T. Roa Santa Maria West Central School Schools Division of Ilocos Sur

24. Marie Jaja T. Roa Santa Maria West Central School Schools Division of Ilocos Sur

25. Marie Jaja T. Roa Santa Maria West Central School Schools Division of Ilocos Sur

26. Marie Jaja T. Roa Santa Maria West Central School Schools Division of Ilocos Sur

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Materials that Float and Sink