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The Metric System

The Metric System. Add these notes in your foldable. Length. Basic unit = meter Other units include: Millimeter (mm) used to measure small objects i.e. top of a stick pin Centimeter (cm) used to measure length of paper Meter (m) used to measure soccer fields

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The Metric System

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  1. The Metric System Add these notes in your foldable.

  2. Length • Basic unit = meter • Other units include: • Millimeter (mm) used to measure small objects i.e. top of a stick pin • Centimeter (cm) used to measure length of paper • Meter (m) used to measure soccer fields • Kilometer (km) used to measure long distances like roads (similar to miles) • Light years - distance light travels in one year. Used to measure from Earth to other planets

  3. Length continued • 10mm = 1 cm • 100 cm = 1 meter • 1000 m = 1 km • Kilo/hecto/deka/m,l,g/deci/centi/milli • Kids have died by drinking chocolate milk. • Kilo = one thousand • Centi = one hundredth • Milli = one thousandth

  4. Temperature • Basic unit = Celcius • 2 Fixed points • 0°C = freezing • 100°C = boiling • Other Comparisons 21°C = room temperature 37°C = body temperature

  5. Density • Basic unit = grams per milliliters (g/mL) • Density = relationship between mass and volume • Formula =mass volume Density of water = 1 g/mL Density is less than 1 g/mL = floats Density is more than 1 g/mL = sinks

  6. Volume • Basic unit = Liter (L) • Volume = amount of space an object takes up. • 3 ways to measure • 1. Regular Solid = l x w x h = cm3 • 2. Liquid = pour in grad. Cylinder and read proper unit i.e. mL • 3. Irregular objects = use water displacement method i.e. 200 mL to 220 mL = 20 mL volume • Units used: mL for liquids or cc/cm3 1cm3=1mL

  7. Mass • Basic unit = kilogram (kg) • Mass = measure of amount of matter in an object. • Units used • Kg = measure large objects like humans • Grams= measure small objects like mice • Ex. Nickel = 5 grams; dollar bill = 1 g • Mg = measure very little things like crumbs

  8. Mass continued • Mass is constant; weight is not. • Mass will stay the same if you go to the moon. • Your mass on Earth is the same as on the moon. • Your body mass won’t change if you go to another planet.

  9. Weight • Basic unit = Newton (N) • Weight = measure of attraction between 2 objects due to GRAVITY. • Gravity = force of attraction

  10. Weight continued • Weight can change on other planets due to different gravitational pulls on each planet. • For Example: • Weight on Earth = 60 lbs. • Weight on moon = 10 lbs. (1/6th)

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