International System (SI)

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Making Measurements in Science

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Presentation transcript:

International System (SI) Measuring system used in science AKA: metric system Length Distance between two points Base unit meter (m) Instrument meter stick or metric ruler Episode 102

Amount of matter in a substance Mass Amount of matter in a substance Base Unit Gram (g) Instrument Balance Weight is mass plus the force of gravity. Episode 102

Amount of space an object occupies Volume Amount of space an object occupies Base Unit Liter (L) Instrument metric ruler or graduated cylinder Episode 102

Interval between two occurrences Time Interval between two occurrences Base unit Second (s) Instrument Stopwatch Temperature Average kinetic energy Celsius (°C) or Kelvin (K) thermometer Episode 102

Measure the width of your textbook A measurement includes both a number and a unit Significant Figures Measured numbers plus one estimated number Episode 102

Examples of volume measurements Volume of liquid = _______ Volume of solid Rectangular solid V = L x W x H Volume of cube = _______ Volume of rectangular solid = _______ Irregular solid (rock) Water displacement 3 cm 5 cm 1 cm 3 cm Episode 102

Practice problems What is the volume of the rock? What is the volume of the rectangular solid? What would the volume of the rectangular solid be using water displacement? 8 cm3 = 8 mL 1 cm3 = 1 mL 4 cm 1 cm 2 cm Episode 102