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The Metric System

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The Metric System

Add these notes in your foldable.

- 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

- 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

- Basic unit = Celcius
- 2 Fixed points
- 0°C = freezing
- 100°C = boiling
- Other Comparisons
21°C = room temperature

37°C = body temperature

- 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

- 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

- 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

- 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.

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

- 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)