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.