1. Copy the table below onto your warm-up. 2. Measure the length and width of the post-it note in centimeters. 3. Convert those measurements to millimeters. 4. Calculate the area of the post-it note. Centimeters Millimeters Length Width Area

1. Ruler We only use the metric side of the ruler The metric side is the side with the most lines and numbers On the metric side the lines with numbers measure centimeters and the smaller lines measure millimeters. There are 10 millimeters in one centimeter.

Reading a Ruler In science, the last digit of a measurement is always estimated. Fractions are not used. When measuring with a ruler, 2 decimal places are needed when using cm and 1 decimal place is needed when using mm. Letter A above indicates a measurement of 0.59 cm or 5.9 mm.

Reading a Ruler The correct measurement for B is _______ cm or _________ mm. The correct measurement for C is ______cm or ______ mm

Reading a Ruler The correct measurement for B is 1.20 cm or 12.0 mm. The correct measurement for C is 2.19 cm or 21.9 mm

Reading a Ruler G ↓ D ↓ D is E is F is G is

Reading a Ruler Reminder: When using a metric ruler that has millimeter markings, 2 decimal places will be needed for centimeter measurements and 1 decimal place for millimeter measurements.

2. Graduated Cylinders Always Read to the Bottom of the Meniscus. The meniscus is the curved water line that occurs due to attraction of water to glass. Graduated cylinder should be at eye level when determining the volume.                                                                            

Graduated Cylinders

Graduated Cylinders

3. Thermometers

Thermometers

4. Triple Beam Balance Before using a TBB you must zero the balance. To do this all riders must be sitting in the slots on the far left of the balance and nothing should be sitting on the weighing platform. If the indicator shows a reading other than “0”, there is a small knob under the left side of the weighing platform. Turn this knob slowly until the two white lines are lined up. TBBread

Triple Beam Balance Turning the calibration knob clockwise will move the pointer down and turning it counterclockwise will move it up. TBBread

To measure out a specific quantity of a powder or crystalline substance: Determine the mass of the container that will hold the substance. Add this quantity to the mass you want. For example if you want to measure out 5 grams of salt and its container has a mass of 4 grams, you come up with the number 9 grams. Set the riders for 9 grams. Slowly pour salt into the dish until the indicator levels off at zero.

5. To Measure Volume Cube: Side³ Rectangular solid: L • W • H Cylinder: πr²h Liquid: Use graduated cylinder Units for solid volume will be length cubed and liquid volume will be liters.

Volume of small irregular shaped objects Pour more than enough water in a graduated cylinder to cover the object. Record the amount of water in the cylinder. Drop the object into the graduated cylinder and record the new amount. Subtract the first value from the second value. Include the units (usually cm³ ) in your measurement. 1 ml = 1cm³

To find surface area For a rectangular surface: L x W For a circular surface: πr²