Buoyancy
What is buoyancy?
The force that pushes up on objects.
Which one is most likely to dissolve a lollipop? Water, Oil or Vinegar?
Water
How do you calculate density?
Mass divided by volume
Name something with a lot of elasticity.
Elastic band.
True or false. Density is the opposite of buoyancy.
False.
Adding salt to water makes it more dense. True or False.
True.
The greater the volume, the _________ (more / less) likely something is to float
more
Name an object that is not very hard.
Fingernails.
False.
The molecular formula for water is?
H20
Anything _______ (more / less) dense than water floats.
less.
Name a very hard object.
Diamonds.
What is the opposite of buoyancy?
Gravity.
Water at 4 degrees celsius has a density of _____?
1
Two liquids, A and B, have densities 0.75 grams per milliliter and 1.14 grams per milliliter, respectively.
When both liquids are poured into a container, one liquid floats on top of the other. Which liquid is on top?
The only one that can float on top is the one that has the density less than one, therefore it is liquid A.
Name a chemical change.
- wood being burned
- eggs being cooked
- cakes being baked
- lab experiments
What is it called when you sit in a bathtub and the water rises?
Water displacement.
A solution must have a _________ and a ___________
solute and solvent
The mass of an object is 5g and the volume is 100cm3. What is the density AND will it float?
0.05g / cm3
Yes it will float.
How did I demonstrate how the molecules in physical changes stay the same?
You used three students and had them move around.