Transcript Let’s Talk About Buoyancy!

Let’s Talk About
Buoyancy!
Created by:
Amanda M. LePage
What is buoyancy?
 Buoyancy
is why an object sinks or floats
when put in water. It is determined by the
upward force of the water below on object
(water displacement) and the weight of the
object itself. If the weight is more than the
buoyancy, the object will sink.
Density
 Density
is important to understand when
talking about buoyancy.
 Density is how much matter an object
contains.
 The more matter an object contains, the
more it will weigh.
Formula for Density
 The
formula for density is :
D= M/V
D= density
M= mass
V= volume
Volume and Mass
 Although
this was not our main focus, it is
also important to know about volume and
mass because in order to calculate density
you must know what the volume and mass
is of the object.
Predictions

After learning about
buoyancy and what
factors affect it, we
made some
predictions.
 The heavier an object
was, the more likely it
would sink.
 The bigger object
would displace more
water.
Experiment
 Our
experiment was testing different
objects to see if they would float or sink.
 We took different objects and made
predictions about their buoyancy.
 We then dropped the objects one by one
into a tub of water and noted whether they
sank or floated.
 When
asked about whether a candy
twizzler would float, we said no because it
was a lot lighter than say, a piece of wood.
 We were wrong, because the matter in the
twizzler was more closely condensed than
in the wood, the twizzler sank while the
wood float.
Conclusions
 We
concluded that the wood floated
mainly because it displaced more water
than the twizzler.
 This is also the case with boats.
 Boats float because of the amount of
water it displaces.
The End
 We
hope you enjoyed our slide show and
you learned a thing or two about
buoyancy. Just remember…
 If
you want to float, try a boat!
(Or anything that displaces enough water to
keep it afloat)