MEASUREMENTS
Prefixes: centi = 1/100th, milli = 1/1000, kilo = 1000x
Length base unit: meter (about 3 inches longer than a yard)
cm = centimeter = distance across your pinky nail
mm = millimeter = side of a dime
km = kilometer = approximately .6 miles (100 km/h is about 60 mph)
Volume base unit = liter (liter soda bottle)
ml = milliliter = the volume of a cube one cm on a side
Volume (3D) base unit = cubic cm or CC
liter cube = 10cm x 10cm x 10cm = 1,000 cm cubed
length x width x height (good for regular solids)
Prefixes: centi = 1/100th, milli = 1/1000, kilo = 1000x
Length base unit: meter (about 3 inches longer than a yard)
cm = centimeter = distance across your pinky nail
mm = millimeter = side of a dime
km = kilometer = approximately .6 miles (100 km/h is about 60 mph)
Volume base unit = liter (liter soda bottle)
ml = milliliter = the volume of a cube one cm on a side
Volume (3D) base unit = cubic cm or CC
liter cube = 10cm x 10cm x 10cm = 1,000 cm cubed
length x width x height (good for regular solids)
Measuring the volume of Jeff's head
- fill bucket with water (to the rim)
- put a dish pan under the bucket
- place head in water (up to neck)
- water that overflows can be poured into graduated cylinders and measured to find volume
- Jeff's head is 4,760 ml
- If his head was water it would weigh 4,760 grams, 4.76 kilograms, or about 10 pounds
Weight base unit = gram (1ml of water weighs 1 gram, paperclip = 1 gram)
500g = 1 lb of fat
kg = kilogram = 2.2 lbs (1,000 grams)
mg = milligram = 15 grains of salt
Surface area base unit = square centimeter
graph paper square = 1cm x 1cm = 1cm squared
Surface area of a box is sum of surface area of all sides.
Time base unit = seconds (one pulse)
1 year = 365 days (Earth rotates around the Sun 1 time)
1 day = 24 hours
1 hour = 60 minutes (time it takes Earth to spin on its axis)
1 min = 60 secs
Temperature base unit = degrees Celsius (C)
freezing pt = 0 degrees C
boiling pt = 100 degrees C
cool day = 10 degrees C
room temp = 21 degrees C
body temp = 37 degrees C
Fahrenheit (F)
freezing pt = 32 degrees F
boiling pt = 212 degrees F
Kelvin (K)
0 degrees K = -273 degrees C
273 degrees K = 0 degrees C
Density base unit = grams per milliliter (g/ml) (water is 1g/ml)
If water is hotter, it is less dense. Cold water is more dense.
Speed base unit = meters per second (m/s) or (kilometers per hour- km/h)
60 mph = 100 kmph
Average walking speed = 4-5 kmph
Acceleration base unit = meters per second per second (m/s/s)
change in speed over time
car going 0-60 in 3 secs is acceleration
stopped position (0 m/s)
500g = 1 lb of fat
kg = kilogram = 2.2 lbs (1,000 grams)
mg = milligram = 15 grains of salt
Surface area base unit = square centimeter
graph paper square = 1cm x 1cm = 1cm squared
Surface area of a box is sum of surface area of all sides.
Time base unit = seconds (one pulse)
1 year = 365 days (Earth rotates around the Sun 1 time)
1 day = 24 hours
1 hour = 60 minutes (time it takes Earth to spin on its axis)
1 min = 60 secs
Temperature base unit = degrees Celsius (C)
freezing pt = 0 degrees C
boiling pt = 100 degrees C
cool day = 10 degrees C
room temp = 21 degrees C
body temp = 37 degrees C
Fahrenheit (F)
freezing pt = 32 degrees F
boiling pt = 212 degrees F
Kelvin (K)
0 degrees K = -273 degrees C
273 degrees K = 0 degrees C
Density base unit = grams per milliliter (g/ml) (water is 1g/ml)
If water is hotter, it is less dense. Cold water is more dense.
Speed base unit = meters per second (m/s) or (kilometers per hour- km/h)
60 mph = 100 kmph
Average walking speed = 4-5 kmph
Acceleration base unit = meters per second per second (m/s/s)
change in speed over time
car going 0-60 in 3 secs is acceleration
stopped position (0 m/s)