1. Measurement  A number and a unit that define a quantity  Time  Distance  Length  Volume  Temperature

2. Rough values  Estimations  Guesses  Not very accurate or precise  About 10m  Approximately 15g  Around 5ml

3. Exact values  Quantitative observations  Very accurate and precise  6.7m  8.3g  14.0ml

4. Types of measurement  Distance  Volume  Mass and weight  Temperature  Time

5. Distance  Measures length, width, or height  Units – cm, m, km  Tools – ruler, meterstick, trundle wheel

6. Volume  Measures capacity  Units – mL, L, cm 3  Tools – graduated cylinder, beaker  * volume of a regularly shaped object is l x w x h measured with a ruler

7. Mass and weight  Measures the amount of matter an object has or how much it weighs.  Units – g, kg, mg  Tools – scales and balances

8. Mass and weight are not the same thing  Mass is the measurement of the amount of matter in an object  Mass does not change  It is the amount of stuff an object is made of  Weight is the measurement of the gravitational pull on an object  Weight changes based on the objects position in the uiverse

9.  Your weight on the moon is 1/6 of your weight on Earth.  Your mass on the moon is exactly the same as your mass on Earth

10. Temperature  Measures how hot or cold something is  Measures the total kinetic energy of an object  Units – 0 C, 0 F, K  Tools - thermometer

11. Time  Measures the amount of time necessary for something to occur  Units – s, min, hr, day, week, etc…  Tools – stopwatch, clock, watch

12. SI Units  International System of Units Metric System  The metric system of measurement is based on multiples of 10  Prefixes are used to indicate what multiple of 10 the base unit is being multiplied by

13. Base Units  For mass: gram (g)  For volume: liter (L)  For distance or length: meter (m)  For time: second (s)

14. PrefixSymbolDecimalFactor TeraT10000000000001 x 10 12 GigaG10000000001 x 10 9 MegaM10000001 x 10 6 Kilok10001 x 10 3 Hectoh1001 x 10 2 Dekada101 x 10 1 Decid0.11 x 10 -1 Centic0.011 x 10 -2 Millim0.0011 x 10 -3 Microμ0.0000011 x 10 -6 Nanon0.0000000011 x 10 -9 Picop0.0000000000011 x 10 -12