1. Metric System Scientific Measurements

2. Measurement Systems  We have our own the “English” system  Science involves a lot of converting, the English system is hard to convert  Metric system is easier to convert because it is based on powers of 10

3. Standard Measurements  A standard measurement system means everyone is using the same measurement system.  Why do is it important in science that all measurements are in the same system?  So we can compare measurements and know what all scientists mean. We are speaking the same “language!”  SI (Systeme International) is another name for the metric system  THEY ARE THE SAME THING!

4. Every country in the world uses the metric system except the US, Liberia and Burma.

5. Metric System Base Units QuantityUnit LengthMeter TimeSecond TemperatureKelvin MassGram WeightNewton (NOT pound) VolumeLiter

6. Metric System Prefixes

7. Converting

8. KHDbase d c m King Henry Drank delicious chocolate milk

9. Practice UnitBase UnitPrefixMeasuring hgGramHectoMass cL km kL cg mm dg Dm mL

10. Types of Measurements Length, Mass, Weight, Mass, Temperature, Time, Density and Volume

11. Length  Distance between two points  Unit is the meter  Use rulers or meter sticks to find

12. Mass  The amount of matter that makes up an object  Unit is the gram  The mass of an object does NOT change unless we ADD or SUBTRACT from it

13. Weight  A measure of the force of gravity on an object  Weight can CHANGE depending on the force of gravity  EX: Earth and Moon  Unit is the Newton (N)

15. Volume  Amount of space occupied by an object  Unit is the Liter  Volume for a Solid: Length x Width x Height = answer cm 3  Volume of a Liquid: Measure in a graduated cylinder

16. Volume  Water Displacement: -Used to find the volume if an object is not square of a liquid -Put water in a graduated cylinder, amount water rises is the volume -Ex: If a rock causes the level to rise from 7 ml to 9 ml then the volume is 2 ml

17. Water Displacement

18. Time  Interval between two events  Unit is seconds

19. Temperature  Measure of how hot or cold something is  Unit is Kelvin  Celsius = scale based on the freezing and boiling points of water  0 ⁰C = freezing point of water  100 ⁰C = boiling point of water

20. REMEMBER:  NO LONELY NUMBERS!  ALL NUMBERS WILL NEED A UNIT!!!!