Measuring The Metric System Lesson 4 Measuring Objectives Measuring (Lesson 4) The Metric System Journal 1. What are the ways we use the metric system? Measuring (Lesson 4) The Metric System The base units the meter for distance, the kilogram for mass, the newton for weight, the second for time, the kelvin for temperature, The liter for volume the ampere for electric current, the mole for amount of substance, and the candela for intensity of light. Measuring (Lesson 4) The Metric System Length Definition: It is the distance between two points. The meter is the SI unit of length. Measuring (Lesson 4) The Metric System Weight versus Mass Why don’t we use weight to measure mass? Mass: measures the amount of matter in an object. 1. Kilogram is the SI unit for mass. 2. (One liter of water has the same mass of about 1 kg) Weight is a measurement of force. The SI unit for weight is the newton (N). 1. It depends on gravity, which can change depending on where the object is located. 2. If you were on the moon would your weight change? Would your mass? Measuring (Lesson 4) Triple beam balance www.explorelearning.com Measuring (Lesson 4) The Metric System Volume Definition: It is the amount of space an object occupies. The cubic meter is the SI unit of volume, and or Liter. 1 liter = 1 kilogram 1000 liters = 1 ton Measuring (Lesson 4) The Metric System Volume By Immersion Not all objects are completely cubic. So how do we measure their volume. Immerse them in water and see how much water is displaced. Measuring (Lesson 4) The Metric System Temperature This relates to how hot or cold an object is. Or how fast the particles, that make up a certain mass, are moving (kinetic energy). Temperature is measure in SI with the Kelvin (K) scale. Measuring (Lesson 4) Temperature Scales Boiling water 100 C 373 K 212 F Freezing water 0 C 273 K 32 F Absolute zero -273 C 0K -459.4 F Measuring (Lesson 4) The Metric System Activity: Make a hodometer and measure the school. Make a scale drawing of the school. Measuring (Lesson 4) The Metric System Review 1. What is a base unit of measuring? 2. What do we measure with the metric system? 3. What is length, mass, weight, and volume? And what is their base unit of measurement? 4. Why are there different scales of measuring temperature?
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