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WELCOME BACK MINIONS!!!Warm-up is on the board…
QUESTION!!!
• Which of the following has more mass?
1 Pound of Feathers
16 ounces of Sand
1/2000 Tons of Chocolate
ANSWER!!!
• They all weigh the same!!!
• 16 oz in a Pound
• 2000 Pounds in a Ton• (So 1/2000 of a ton is a pound!)
(Trick-trick!!! NEENER!!!)
WEIGHT AND MASS
• What is WEIGHT???• Weight is the measure of the force of gravity’s effect
on an object!
• What is MASS???• Measurement of the amount matter in an object!
UNITS OF MASS
Scientists use a system called:
International System of Units
(or “S.I.”)
French: ”Système international d'unités”
UNITS OF MASS
• SI unit of mass is the KILOGRAM
• Sometimes you will use “grams” instead.
• 1000 grams = 1 kilogram
VISUAL EFFECT TIME!!!
Check this out!!!
VISUAL EFFECT TIME
• 2 Buckets• 1 Cola• 1 Diet Cola• Both cans same
volume.• Regular sinks,
but…• Diet Floats!
HOW DID THIS HAPPEN?
Perhaps we should look at the volume.
Volume = Length x Width x Height
HMMM…
• Perhaps we can check the mass of each can…
WHOA!
• The Volume is the same, but the Mass is different.
• This is where DENSITY is applied.
• What is DENSITY?
MORE MATH!!!
Density =
Density – Relates to the mass of an object
within a given volume.
ONE MORE NIFTY THING TO SEE…
Is density limited to solid objects?
GAS?
• What is the difference between…• Balloon you inflate using
your lungs…• Balloon you inflate using a
helium tank.
• DENSITY OF THE GAS!!!
LIQUID???
What is this upon the counter???
REVIEW…
• What is weight?
• 1) It is the measurement of the amount matter in an object.
• 2) It is the measure of the force of gravity’s effect on an object.
• 3) It is patiently standing by for something to happen.• 4) None of the above.
REVIEW…
• What is mass?
• 1) It is the measurement of the amount matter in an object.
• 2) It is the measure of the force of gravity’s effect on an object.
• 3) It is patiently standing by for something to happen.• 4) None of the above.
REVIEW…
• Density is…
• 1) How dense an object is.• 2) Calculated as Mass divided by Volume.• 3) Relates to the mass of an object within a given
volume• 4) All of the above.
HOMEWORK…
• Review Chapter 2• Section 1• Section 2• Section 3
• All vocabulary terms and definitions from the above sections.