1. 6th Science
Metric Measurement

2. International System of Units
Abbreviated SI
Uses 10 as base unit
SI Prefixes
kilo hecto deca unit deci centi milli
Larger  smaller
(Unit – meter, liter, or gram)

3. Prefix Staircase kilo hecto deka base unit meter liter deci
gram centi milli

4. Length SI standard unit is meter (m)
Measure with metric ruler or meter stick
1 meter = 100 cm
1 cm = 10 mm

5. Mass Measure of amount of matter in object Standard SI unit is gram.
Use balance to measure mass.
Add the weight from
the three slides.
Mass stays the same no matter where it is measured

7. Weight Measure of gravitational force: attraction between objects
2 factors affect weight:
1) mass of objects
2) distance between objects
Standard SI unit is Newton.
Use spring scale to measure weight.
Changes from place to place if gravity is different

8. Volume Measure of how much space an object occupies
Volume of regular solid
volume of rectangle= length x width x height
V = 2m x 4m x 3m
V = 24 m 3
Do the Math page 10 - now You Try It! (page 11)

9. Volume of a Liquid Measured with a graduated cylinder
Unit is liter (L) or milliliter (mL)

10. Volume of an uneven object (ex. Rock) * Use water displacement
1) Fill graduated cylinder so object will be covered ( 30 to 50 mL)
2) Gently drop object into cylinder.
3) Read new volume
4) Subtract (new volume – old volume)
*Object must have density greater than 1 (density of water). If density is less than 1, the object will float.
Density? What’s that…….?!?!?

11. Density = Measure of amount of matter that occupies a particular space.
Formula: Density = mass/volume
Problem 1: Pumice is an igneous volcanic rock, formed by the rapid cooling of lava. What is the density of a 49.8g piece of pumice that has a volume of 83cm ?
Identify
What do you know?
What do you want to find?
Plan
Write the formula
Substitute the given values into the formula
Solve
Divide
Check that your units agree now You Try It! (page 14)

12. Problem 2 (p. 15) – A basalt rock displaces 16 mL of water
Problem 2 (p. 15) – A basalt rock displaces 16 mL of water. The density of the rock is 3.0 g/cm . What is the mass of the rock?
Identify
What do you know?
What do you want to find?
Plan
Write the formula
Substitute the given values into the formula
Solve
Divide
Check that your units agree
now You Try It! (page 15) 3