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**Metric System Measuring Data Learning Objectives**

1. Identify correct SI units of measurement for length, mass, volume, temperature and area 2. Use metric units to measure various data

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**Let’s take some measurements!**

Intro—ask students crazy conversions How many feet in a mile? How many ounces in a quart? How many lbs in a ton?

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Metric system Scientists use a common measurement system so they can compare their results. Single standard system of measurement is called the metric system or International System of Units (SI for short) Only countries that do not use metric system: United States Burma (Myanmar) Liberia Based on factors of 10

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SI Prefixes

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**Base Units Mass - the amount of matter that makes up an object**

Unit of Measurement: grams (g) Volume- the amount space occupied by a solid, liquid, or gas Unit of Measurement: liter (L) Length - the measurement of something from end to end Unit of Measurement: meter (m)

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**Mass Volume Length grams (g) liters (L) meters (m)**

1 ton dump truck = 1000 kg = 2000 lbs grams (g) 1 marble = 3 g Volume 1 can of soda = 355 mL liters (L) Weight of a marble in g ? MD—pour out 100 mL in graduated cylinder Shoe size = length of football field = 105 m; roughly 400 shoes long Shoe size of 9 (women) = 9.85 in = 25.1 cm Length Shoe size of 9 (men) = in = 26 cm meters (m)

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**Base unit: meters, grams, or Liters**

Kate Hudson doesn’t understand doing college math.

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**Mass Mass - the amount of matter that makes up an object**

Unit of Measurement: gram Tools: triple beam balance or scale Mass is not the same as weight. Weight- the gravitational pull of an object Ex. Gravitational pull on the moon is less, so we weigh less on the moon (6 times less) Person who weighs 100 lbs on Earth = 16 lbs on Moon

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**Volume Volume- the amount of space occupied by a solid, liquid, or gas**

Unit of Measurement: liter (L) Volume of liquid is measured using a graduate cylinder or a beaker that is marked with a scale in milliliters (mL)

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Volume For objects with regular shape like a cube or rectangular prism, we can use a formula to calculate its volume. Volume of a cube = side x side x side Volume of rect. Prism = length x width x height For irregular shaped objects like a rock, the water displacement method is used. Beaker or graduated cylinder is filled with water to specific level, object is placed in beaker. Change in water level = volume of object.

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**Reading a Graduated Cylinder**

11.5 mL meniscus What is the volume of the liquid in the graduated cylinder?

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**Length Length- the measurement of something from end to end**

Under SI system, the base unit for length is meter (m) Tools: ruler or meter stick, or measuring tape radius width length diameter

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Area Area- the inside shape or space of a an object measured in square units In rectangles and in squares, a simple calculation of length times width will give the number of square units 2 x 2 = 4 m² 4 x 4 = 16 m²

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Temperature Temperature – a measure of how warm or cold an object is with respect to some standard ● Fahrenheit (US) after G.D. Fahrenheit 32°F = freezing 212°F = boiling ● Celsius (rest of world) after A. Celsius 0°C = freezing 100°C = boiling

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**How do you convert? To Convert to Celsius To Convert to Fahrenheit**

Tº C = Tº F – 32 Tº F = 1.8 (Tº C) + 32 1.8

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Metric System Notes In this presentation we will review the metric system. Please fill out your note sheet in your science journal as you go through the.

Metric System Notes In this presentation we will review the metric system. Please fill out your note sheet in your science journal as you go through the.

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