1. oneone SK-4 Objective: To define “mass” and “weight” in order to distinguish between the two. CSI Note: Why do scientists prefer to measure using mass rather than weight? Drill: Take out your homework. Do you have an reason written for each answer? Take out a clean sheet of paper. Get a new paper from the SET.

2. oneone SK-4 KEY VOCABULARY 1. mass – the measure of the amount of matter in an object (does not change based on location) 2. weight – the measure of the gravitational force on an object by another body (changes based on gravity and mass) Click here for your weight on other planets. 3. gram (g) – the basic unit for mass (about the mass of a paper clip) 4. kilogram (kg) – 1000 grams ***Mass is often measured using a triple beam balance. ***

3. oneone SK-4 Why do people go on diets? Hmmm.

4. oneone SK-4 How can a person gain mass? Eating Injections Drinking Implants Inhaling Braces

5. oneone SK-4 How can a person lose mass? BleedingLosing TeethBlowing NosePuking Drooling“Pooping”Clipping NailsCrying SweatingAmputationEarwax outHaircut CoughingSkin PeelingZit PoppingSpitting UrinatingOrgan RemovalDonating BloodShaving ___________________

6. oneone SK-4 How can a person gain or lose weight? 1. gain or lose mass 2. go to a different gravity

7. oneone SK-4 Basic Conversions (on Earth) 1 pound ≈ 0.453 kg 1 kg ≈ 2.2 lb The gravity on the moon is about 1/6 the gravity on the Earth!!

8. oneone SK-4 TRY THESE What is your approximate weight on Earth? What would be your approximate weight on the moon? What is your approximate mass on Earth? What would be your approximate mass on the moon?

9. oneone SK-4 TRY THESE What is your approximate weight on Earth? Weight = “x” What would be your approximate weight on the moon? Weight on Moon = “x” ÷ 6 What is your approximate mass on Earth? Mass on Earth = “x” × 0.453 What would be your approximate mass on the moon? Same as Mass on Earth…WHY?

10. oneone SK-4 Homework: 1.Review your notes. 2.Organize your binder.