# Matter 43 Matter I Matter a Matter is

- Slides: 47

Matter 4/3

Matter I. Matter a. Matter is what the universe is made out of (atoms) b. Matter is anything that has mass and volume

II. Physical Properties a. characteristics of matter that can be observed without changing the identity of the substance • Color • Freezing Point • Boiling Point

What’s in the bag?

1. Specific Properties a. color b. odor c. size d. shape e. texture f. hardness

Physical Properties?

2. General Properties a. mass b. volume c. density d. weight

III. Mass a. mass- the amount of matter in an object ** it does not change from one place to another

b. Mass and Inertia 1. inertia- the resistance of an object to changes in motion 2. the more mass an object has, the greater its inertia

More mass = greater inertia

3. mass is measured in grams (g) and kilograms (kg) 1000 mg = 1 g 1000 g = 1 kg

A dime is about 1 gram

Volume

III. Volume a. volume - the amount of space an object takes up

1. Solids are measured in cubic centimeters or centimeters cubed 3 (cm ) 2. Volume = length x width x height V=Lx. Wx. H

V=Lx. Wx. H 3 4 cm x 6 cm x 5 cm = 120 cm

3. Liquids are measured in milliters (ml) and liters (L) 4. 1000 ml = 1 liter 1000 liters = 1 kiloliter

3. 1 ml = 1 cm 3 1 ml

3 1 cm = 1 ml

Examples = 3 15 cm = 25 ml = ______ ml 3 ______ cm

Examples = 15 cm = 25 ml = 15 ml 3 25 cm

Density

IV. Density a. densitya measure of how much mass is contained in a given volume of an object

1. in other words, it’s how much matter is contained in a certain amount of space

Which is more dense?

Formula: Be able to Solve B. Density = mass volume

B. Density = mass volume D=m v (g) 3 (ml or cm )

c. In order to compare the masses of two objects, the objects must be equal in volume.

Examples: if an object has a mass of 50 g and a volume of 10 cm 3, what is its density? D=m v D = 50 g/10 cm 3 D = 5 g/cm 3

Example: If a liquid has a volume of 5 ml and a mass of 10 g, what is its density? D = m/v D = 10 g/5 ml D = 2 g/ml

Example: If the density of a diamond is 3. 5 g/cm 3 and its volume is. 5 cm 3, what is its mass? mass = d x v mass = 3. 5 g/cm 3 x. 5 cm 3 mass = 1. 75 g

*d. The density of fresh water is 1 g/ml - if an object has a density less that 1 g/ml it will float in fresh water - if the object has a density greater than 1 g/ml It will sink in fresh water

Weight 4/20/12

V. Weight A. Weight. The measure of the force of gravity between objects 1. gravity- the force of attraction between objects

2. the greater the mass of an object the greater its gravitational force 3. Your weight is a direct measure of the planet’s force pulling you toward it center.

B. Weight = gravity x mass Weight = 9. 8 m/s/s x the object’s mass Ex. Weight = 9. 8 m/s/s x 3 kilograms = 29. 4 kg m/s/s or 29. 4 n

C. Weight can be measured in newtons (N) or pounds (lbs. ) — about every 1 pound = 4 newtons

Example: If an object has a mass of 50 kg, what is its weight in newtons? Weight = gravity x mass W = 9. 8 m/s/s x 50 kg W = 490 N

Example: If an object weighs 500 N, what is its mass? weight = gravity x mass 500 N = 9. 8 m/s/s x mass 51 kg = mass

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