1. Floating and Sinking
Section 6.3

2. MORE dense in than water
Rules for Density
Denser objects sink
Less Dense objects float
Objects of the same density will be suspended
Fish Food
LESS Dense then water
FLOATS on top
Fish
SAME density as water
FLOATS in the center
Plants and Rocks
MORE dense in than water
SINKS

3. Rearrange the equation…
Calculating Density
What is an object’s density if it has a mass of 15g and a volume of 2.5mL?
D = m / V
D: density (g/mL)
m: mass (g)
V: volume (mL)
Rearrange the equation…
V = m / D
m = V x D

4. TRY IT! Do the density worksheet for homework!!!
Paste it in your notebook as your output!

5. Buoyancy How do ships float if they are made of metal?
Buoyant Force – acts in the upward direction, against the force of gravity to make something seem lighter
Hollow objects that are full of
air are very buoyant because
they have a large surface area
and gases are less dense then air

6. Archimedes’ Principle
-Archimedes Principle – the buoyant force on an object is equal to the weight of the fluid displaced by the object