Transcript Scientific Method - Christopher Dock Mennonite High School

SI Measurement
• Le System international d’Unites
• Internationally agreed
– 75 000 not 75, 000
– Meters not miles
– Liters not gallons
Units?
•
•
•
•
•
mass
length
Volume
Time
Amount of a substance
Other Units
• Derived unit – combination of units like in
velocity m/s2, or pressure kg/m s2
• Density – g/cm
Density
•
•
•
•
D = m/v
Ratio of mass to volume
The mass divided by the volume
Physical property
Mass
• kilogram is the standard
– 1000 grams
• We use grams – more useful in science class.
• King Henry Chart
– Remember
• Mass measure of matter, does not depend on
gravity
• Weight – measure of the gravitational pull on the
mass
Mass and weight
• mass is the amount of matter and will not
change with location
• Weight is a measure of gravity and will
change with location
How to convert
• King Henry chart – memorize
• King Henry drank uho delicious chocolate
milk
• Kilo Hecto daka ______deci centi milli
Larger prefixes
• Mega
• Giga
• tera
Smaller prefixes
•
•
•
•
•
Micro
Nano
Pico
Femto
atto
Multiple conversions
• Affects density, area etc
• If the unit is squared, you need to convert
twice.
• If the unit is cubed you need to convert
_______________
Practice
• Pg 60. #31-34