MEASURE THIS!
Why is saying "the desk is 6 long" an incomplete measurement?
Because a measurement needs a number AND a unit
What does the metric prefix kilo- mean?
103 = 1000
What is the main rule for knowing whether you've arranged a conversion factor correctly?
The unwanted units cancel, leaving the desired unit
Two students measure the same desk and get slightly different values. Does that automatically mean one person is wrong?
No. Measurements have uncertainty, and small differences can occur based on the measuring tool and how the measurement was made.
What does the metric prefix micro- (µ) mean?
10-6
2.5 km --> m
2500 m
A ruler has markings every 0.1 cm. Should you report only the digits you can read directly from the ruler?
No. You should report the certain digits plus one estimated digit
Which is larger: 1 meter or 1,000,000 micrometers?
They're equal
1 m =3 ft 3.37 in 1 x 106 µm
A person walks 10.0 m in 5.0 s. What is their speed in m/s?
Bonus: Convert your answer to km/h
2.0 m/s
7.2 km/h
A student converts 575.2 dm to km and gets 57,520 km. Without doing the entire calculation, how can you tell something is probably wrong?
A decimeter is much smaller than a kilometer, so when expressing the same distance in kilometers, the numerical value should become smaller, not dramatically larger