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Unit 2-1
(The things we use to make
observations in a science class.)
Tools of Measurement
Measurement
 A measurement is an observation that we
make using a tool (meter stick, graduated
cylinder, triple beam balance, etc.).
 When we calculate something like volume,
we first take measurements then
manipulate the numbers using a formula.
 We can MEASURE the volume of a liquid
but we CALCULATE the volume of a box!
Measurement
****Always remember  if you are going
to do a calculation using your
measurements, you must always use the
SAME UNITS for each measurement 
you cannot multiply cm and mm  you
must first convert one to the other!
****
Measurement: Metric Ruler
 Used to measure length (meters)
Metric Units
= GOOD!
English = BAD
How do you measure with a metric
ruler?
 Always start with the black line, not the edge
of the ruler.
 Use the side of the ruler with cm or mm.
Using a Ruler
 Count the whole numbers and then the
remaining black lines.
 Each individual black line represents 1 mm.
There are 10 black lines between each cm.
Using a Ruler
 Hold the zero - all answers must have a value
in the tenth decimal point position (4.0 mm, 25.1
cm).
 Do not use fractions to record answers.
Another example
How about this?
1.6 10.6
End  start = actual length
10.6  1.6 = 9.0 cm
unit_2-1_metric_ruler_and_mass_ppt.ppt
Mass versus Weight
 Mass and weight are NOT the same thing.
 Mass  the amount of matter in an object
What is weight?
 Weight  is the measure of the pull of
gravity on an object.
Example:
The moon is 1/6 of the
Earths gravity.
Weight will be 1/6 of
what it is here on Earth
(divide by 6).
However, their size will
not change!
A person will not
physically shrink to 1/6
their size if they go to
the moon!
Measuring Mass:
Triple Beam Balance
How do we use
it..?
Let's See!
Measures mass in grams!

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  • 2. (The things we use to make observations in a science class.) Tools of Measurement
  • 3. Measurement A measurement is an observation that we make using a tool (meter stick, graduated cylinder, triple beam balance, etc.). When we calculate something like volume, we first take measurements then manipulate the numbers using a formula. We can MEASURE the volume of a liquid but we CALCULATE the volume of a box!
  • 4. Measurement ****Always remember if you are going to do a calculation using your measurements, you must always use the SAME UNITS for each measurement you cannot multiply cm and mm you must first convert one to the other! ****
  • 5. Measurement: Metric Ruler Used to measure length (meters) Metric Units = GOOD! English = BAD
  • 6. How do you measure with a metric ruler? Always start with the black line, not the edge of the ruler. Use the side of the ruler with cm or mm.
  • 7. Using a Ruler Count the whole numbers and then the remaining black lines. Each individual black line represents 1 mm. There are 10 black lines between each cm.
  • 8. Using a Ruler Hold the zero - all answers must have a value in the tenth decimal point position (4.0 mm, 25.1 cm). Do not use fractions to record answers.
  • 10. How about this? 1.6 10.6 End start = actual length 10.6 1.6 = 9.0 cm
  • 12. Mass versus Weight Mass and weight are NOT the same thing. Mass the amount of matter in an object
  • 13. What is weight? Weight is the measure of the pull of gravity on an object.
  • 14. Example: The moon is 1/6 of the Earths gravity. Weight will be 1/6 of what it is here on Earth (divide by 6). However, their size will not change! A person will not physically shrink to 1/6 their size if they go to the moon!
  • 15. Measuring Mass: Triple Beam Balance How do we use it..? Let's See! Measures mass in grams!