MEASUREMENT DEFINITIONS

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MEASUREMENT DEFINITIONS
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MEASUREMENT DEFINITIONS

• 1. Length the distance between two points.
  There are many synonyms for length, such as
• distance, height, width, depth, thickness,
  circumference, radius
• SI unit for length meter (m)

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MEASUREMENT DEFINITIONS
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MEASUREMENT DEFINITIONS

• 2. Volume the amount of space something takes
  up
• In this class we will measure the volume of
  things in mL (liquids) or cm3,(solids) which are
  actually the same thing. We will use a graduated
  cylinder to measure the volume of liquids and
  gases.
• For rectangular volumes, you would use the
  equation of length x width x height

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MEASUREMENT DEFINITIONS
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MEASUREMENT DEFINITIONS

• 3. Mass a measure of the amount of matter an
  object contains. A better definition is a
  measure of how many protons, electrons, and
  neutrons something is made up of.

The SI unit for mass kilogram (kg)
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MEASUREMENT DEFINITIONS

• 4. Temperature a measure of the amount of
  molecular motion on the average. Heat makes
  molecules vibrate faster.

The SI unit for temperature Kelvin (K), but
in this class, we will be using Celsius (C).
Water freezes at 00C Water boils at 1000C
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MEASUREMENT DEFINITIONS

• Question
• When do your molecules vibrate the most?
• Answer
• When you have a fever!!

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MEASUREMENT DEFINITIONS

• 5. Weight a measure of the amount of
  gravitational attraction between two objects (or
  between two masses). One of the masses is
  usually a planet.
• The SI unit for weight Newton (N)

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MEASUREMENT DEFINITIONS

• Imagine a person who weighs 110 pounds and
  complete the chart for that person
• Their Mass will be measured with a balance.
• Their Weight will be measured with a scale.

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MEASUREMENT DEFINITIONS

• If a 110 pound person goes to Earth
• Their mass will be 50 kg
• Their weight will be 110 pounds

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MEASUREMENT DEFINITIONS

• If a 110 pound person goes to the Moon (1/6)
• Their mass will be 50 kg (doesnt change)
• Their weight will be 18.3 pounds (110 pounds
  / 6 18.3 pounds)

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MEASUREMENT DEFINITIONS

• If a 110 pound person goes to Jupiter (12x)
• Their mass will be 50 kg (doesnt change)
• Their weight will be 1320 pounds (110 pounds
  x 12 1320 pounds)

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• If a 110 pound person goes to Deep Space (away
  from planets)
• Their mass will be 50 kg (doesnt change)
• Their weight will be weightless

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MEASUREMENT DEFINITIONS

• 6. Density a measure of the compactness of
  matter or how compact protons, neutrons, and
  electrons are

Density Mass/Volume
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MEASUREMENT DEFINITIONS

• Common SI Prefixes

These are all in relation to the SI unit
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MEASUREMENT DEFINITIONS

• Try These
• 1) How many cm are in 3,075 mm?
• 2) How many km are in 26.78 cm?
• 3) How many grams are in 59.4 kg?
• 4) How many seconds are in 3.62 hours?

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MEASUREMENT DEFINITIONS

• 3075 mm
• 2) 26.78 cm

1 cm
307.5 cm
10 mm
1 m
1 km
0.00026 km
100 cm
1000 m
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• 3) 59.4 kg
• 4) 3.62 hr

1000 g
59,400 g
1 kg
60 min
60 sec
13,032 sec
1 hr
1 min