Measuring

How to be

PRECISE and ACCURATE

How to Measure MASS

MASS – the amount of MATTER in an object; measured in grams (gm)

Triple Beam Balance

• Place an object on the pan.

• Slide the rider with the largest mass along its beam until the pointer drops below zero.

• Move it back one notch.

• Repeat the process on each beam until the pointer stays at zero.

• Add the masses on each beam to find the mass of the object.

How to Measure VOLUME

(Liquid Volume) – The amount or liquid; measured in milliliters (ml)

Graduated Cylinder

• A meniscus is the curve of the surface of the water in a graduated cylinder.

• Water "sticks" to the walls of the graduated cylinder, but only on the sides and not the middle. 

• When you look at the surface, the water level is not straight – it’s curved like a smile. 

• Measurement should be at the BOTTOM of the meniscus.

• Read the meniscus at eye level in to get an accurate reading.  read the meniscus at eye level.

Read the volume here

How to Measure LENGTH

• Most metric rulers have lines indicating centimeters and millimeters.

• The centimeter lines are the longer, numbered lines.

• The shorter lines are millimeter lines. • When you use a metric ruler, line up the

0-centimeter mark with the end of the object being measured.