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Lab Equipment How to Measure Length Length – Distance from one point to another. Units = Meters (Km, cm, etc.) Equipment – Ruler, Meter Stick How to Measure Mass Mass – Amount of matter in an object Units = Grams (Kg, mg, etc.) Equipment - Triple beam balance Mass vs. Weight Weight Measure of gravity's effect on something Weight = mass x gravitational acceleration Measure with a scale. Mass The amount of matter in an object Can measure with balance weights because the balance weights change by the same factor as the object you are measuring Mass vs. Weight • Move to a different planet and an object's weight will change, but its mass will be the same. Volume - How much space an object occupies Methods to Measure Volume: 1. If liquid, use a graduated cylinder 2. If regular shaped solid, use math formula: L x W x H = Volume Methods to Measure Volume: 3. If irregular solid, use water displacement method Subtract the two volumes! Units of Volume If liquid, use Liters (L) Equipment: Graduated Cylinder, Beaker If solid, use meters3 or cm3 To the third power because L x W x H, which is cm x cm x cm = cm3 Which is the Most Precise? Which of the groups measured the volume with the highest precision? Reading Volume Read from the bottom of the meniscus! Which of the following pieces of equipment would be most appropriate for measuring the volume of a marble? How to Measure Temperature Thermometer Temperature – The degree of hotness or coldness of an object. Units – °C or Celsius Other: Water boils at 100°C Water freezes at 0°C