1. Which weighs more, a pound of feathers, or a pound of bricks?
Measuring Matter
Which weighs more,
a pound of feathers, or a pound of bricks?

2. Weight or Mass? Weight is a measure of the force of gravity on you
Mass is measurement of how much matter is in an object
An object’s weight changes from Earth to the moon or other planets, but the mass stays the same. REASON?
Weight is a measure of the force of gravity on you, on the moon, gravity is much weaker.

3. Measuring Mass Uses International System of Units (SI)
kg = kilogram is a unit of mass
g = gram
1000 g = 1 kg
Examples:
Nickel = 5 g baseball = 150 g glass of water =200g

4. Measuring Volume Volume is…… the amount of space that matter occupies
Regular objects
Volume = length x width x height
A rectangle has a
length= 9 cm
height= 5 cm
width= 4.2 cm
Then, 9 x 5 x 4.2 =189 cm3 (cubic centimeters) W H L

5. Measuring Volume Irregular Objects
Use water displacement with a graduated cylinder
Odd shaped objects like: ball, egg, rock
STEPS:
Fill graduated cylinder with water
Measure mL of water at the meniscus and write down amount
Place irregular object in graduated cylinder
Measure mL of water at the meniscus again
Find the difference between the 2 water levels by subtraction
Record the answer in volume mL

6. Other units of measurement
Measuring liquids
liter (L)
milliliter (mL)
1000 mL = 1 L
Measuring Distances
kilometer (km)
meter (m)
centimeter (cm)
millimeter (mm)
10mm = 1 cm
100cm = 1 m
1000m = 1 km

7. Density
Density is the measurement of how much mass is contained in a given substance
Density = mass divided by volume
Things that float on water are less dense than water. Less dense in water = float
Things that sink in water are more dense than water. More dense in water = sink
Things that neither float or sink, stay level, have the same density Same density = level