SI Base units Length in meters (m) Mass in grams (g) Volume in liters (l) or meters cubed (m 3 ) Time in seconds (s) Temperature in degrees Celsius (°C)

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Presentation transcript:

SI Base units Length in meters (m) Mass in grams (g) Volume in liters (l) or meters cubed (m 3 ) Time in seconds (s) Temperature in degrees Celsius (°C)

Powers of ten Every prefix stands for a number, and are multiples of 10 All units use the same prefixes Kilo = 1,000 Deca = 10 Centi = 1/100 th Milli = 1/1,000 th Left side: what would better to measure in Kilometers than Millimeters and visa versa?

Metric conversions To change from one unit to another, you either multiply or divide by 10 You just move the decimal to the right or to the left Example: 1m = 100 cm Left side: Does a number gets bigger or small when you move the decimal place to the right.

Derived units When 2 or more types of measures are combined speed: meters/ second (m/ s) Density: mass/ volume (g/L) or (g/m 3 ) Area: meters squared (m 2 )

Measurement tools 1. Graduated cylinders are used to measure volume 2. Scales and balances are used to measure mass 3. Rulers and tape measures are used to measure distance 4. Watches and clocks are used to measure time 5. Thermometers are used to measure temperature

Lab equipment Flask beakerTest tubes in rack Forceps Petri dish

Summary In a paragraph answer the following questions 1. What is the base unit for liquid volume? 2. Density is an example of a _____ unit. 3. Is a millisecond a longer or shorter period of time than a second? 4. List what tools are used to measure different qualities of matter.