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Metric System 7th/8th Grade
Transcript of Metric System 7th/8th Grade
The "SI" System
(aka the metric system)
Why do scientists need an "international system"?
Length & Distance
Tools: Meter stick, metric ruler,
tape measure, trundle wheel.
base unit is the gram (g)
a repeatable observation
of an amount or quantity
that includes a number
and a unit.
Example - 7 cm, 8 cc, 12 g.
Estimate - to judge tentatively or approximately the value, worth, or significance of. Students do this A LOT!!! This is not measuring, it is guessing.
Example - About 2 cm, more than 15 minutes.
Base unit is meter (m)
Units we will use
Kilometer Km - about 10 football fields
Meter - think meter stick
Centimeter (cm) - width of little finger
Milimeter (mm) - thickness of dime
The amount of space something takes up.
Base unit is the liter (L)
What measurement would you make?
1 mL = 1 cc (cubic centimeter)
mL is used for liquid colume
cc is used for solid volume
Tools used to measure volume
Liquids - beakers, flasks, graduated cylinder
Solids - Meter stick, metric ruler
a measure of how much matter "stuff" is in an object.
measured with a balance
most common prefixes
A measure of how much matter is packed into a space.
It is a calculated measurement. It cannot be directly measurd.
Measured in g/cm3
can tell if something floats
used to identify matter
Measure of heat in an object.
Ice melts = 0 degrees Celsius
Human Body = 32 degrees Celsius
Water boils = 100 degrees Celsius
Room temp = 22 degrees Celsius
Scientists use Celsius
America uses Fahrenheit
1st – Determine your starting point.
2nd – Count the “jumps” to your ending point.
3rd – Move the decimal the same number of jumps in the same direction.