MEASUREMENTS:

SI = International System of Units

(standard system of measurement)

You must always label measurements with the appropriate unit.

Example: 5, 5 what?

5cm

SI UNITS:

Length = meters (m)

Volume = liters (L)

Mass = kilograms (kg)

Time = seconds (s)

When you are taking measurements with a…..

Ruler…you will need to know the difference between cm and mm.This is measuring LENGTH.

Graduated Cylinder…

You want to read from the bottom of the meniscus.

The meniscus = the curved line of liquid on a graduated cylinder

Read to the nearest .1 (tenth)

Example: 25.3mL (the units from a graduated cylinder is milliliters)

This is measuring VOLUME

Balance:

You will read to the nearest .1 (tenth).

You will add up all three arms of measurement to get total mass.

Example 132.4g (grams)

This is measuring MASS.

What does this read?

Always start with the biggest and then work down to the smallest. 373.3g