Metric Mass Finding the weight of an object

Metric Mass Finding the weight of an object is also described as “measuring its mass”.

Imperial Measurements These include ounces, pounds and stones, units of measure which some people still prefer to use today. Fruit sellers often offer their customers a pound of bananas.

Metric Measures of Weight or Mass n We use milligrams for very small items, such as pills n Grams are used for light-weight items, such as this frog

n Kilograms measure the weight of heavy objects n Tonnes are for measuring objects weighing more than 1000 kilograms

Word recognition time milli kilo from the Greek word chilioi meaning 1000 from the Latin word mille meaning 1000

There are 1000 grams in 1 kilogram

There are 1000 milligrams in 1 gram Each milligram is one thousandth of a gram!

Conversions are easy! This is because the “magic number” is … 1000

Try these: n 4000 grams = n 255 grams = n 88 grams = 4 kilograms 0. 255 kilograms 0. 088 kilograms 0. 003 kilograms

Estimate the weight of these items: n 600 n 180 grams

n 520 n 450 grams

The hammer weighs … 2 grams 800 grams The nail weighs …

What unit of measure would you use to describe these items? n Grams? n Kilograms?

What unit of measure would you use to describe these items? n Grams? n Kilograms?

When you are weighing objects using metric measures, you will not go wrong if you remember that this is the magic number… 1000