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# Relative Density

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by

## James Newman

on 5 May 2015

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#### Transcript of Relative Density

Sink or Float
Relative Density
Relative Density
What Did You Learn?
1. Think about what makes something float or sink.

2. Thumbs up when you have an answer.

3. Turn to a shoulder partner. Tell them your idea using the stems:

"I think objects float because _______."
"I think objects sink because _______."

4. Be ready to share with the whole class.
Why Do Objects Float or Sink?
1. At your table, sort the cards. Put them in order from LEAST DENSE to MOST DENSE.

2. Which objects will float in water? Which will sink?

Let's Practice
More or Less Dense than Water?
ICE
OIL
MARBLE
APPLE
PING PONG BALL
PENNY
LARGE PIECE OF WOOD
SMALL PIECE OF WOOD
PIECE OF WOOD WITH A HOLE
STYROFOAM BALL
STYROFOAM BALL WITH A HOLE
CORK
PLASTIC SPOON
RUBBER BAND
SINK OR FLOAT?
Relative Density
Density is the amount of "stuff" (MASS) that is in a certain amount of space (VOLUME).
If an object is MORE DENSE than another object, it will SINK.
If an object is LESS DENSE than another object, it will FLOAT.
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