Metric Conversions H.León’s Grade 8 Science

There are many different measurements that we can take. We can measure mas, volume, distance, pressure, etc… When we give a measurement, we give a number AND a unit. For example: “I am 135 cm tall.” “I am 5 feet tall,” “I am 1.35 m tall.” Can you point out the units? Metric Conversions Notes

There are many different measurements that we can take. We can measure mas, volume, distance, pressure, etc…

When we give a measurement, we give a number AND a unit.

For example: “I am 135 cm tall.” “I am 5 feet tall,” “I am 1.35 m tall.”

Can you point out the units?

Metric Conversions Notes In Canada, we use the Metric System for Measurement. The following are examples of metric units and what they measure: t Time seconds s F Force newtons N P Pressure pascales Pa V Volume cubic metres m 3 V Volume litres L A Area metres squared m 2 M Mass grams g D Distance metres m Symbol It Measures Unit Name Unit

In Canada, we use the Metric System for Measurement.

The following are examples of metric units and what they measure:

Metric Conversions Notes Metric Units can be attached to prefixes to refer to larger and smaller amounts. For example: Instead of a recipe asking for 0.005 L of vanilla, it can ask for 5 mL What is the difference? What is the prefix? Which would you use to buy milk? L or mL?

Metric Units can be attached to prefixes to refer to larger and smaller amounts.

For example: Instead of a recipe asking for 0.005 L of vanilla, it can ask for 5 mL

What is the difference?

What is the prefix?

Which would you use to buy milk? L or mL?

Metric Conversions Notes Here is a way to remember metric prefixes: Stands for… And is symbolized as… Metric Converting Dead Over Dropped Henry King mili- centi- deci- deca- hecto- kilo- m- c- d- da- h- k-

Here is a way to remember metric prefixes:

Metric Conversions Notes These prefixes can be added to many metric units: m- c- d- da- h- k- mPa Pa daPa cL L g hg dm m Km Pa L g m

These prefixes can be added to many metric units:

Metric Conversions Notes Lets add numbers to that chart. If I buy 4000 mL of milk, it means I am buying 4L 400 cL 40 dL 0.4 daL 0.04 hL 0.004 kL 800 cL 80 dL 0.8 daL 0.08 hL 0.008 kL Do you see a pattern? Now guess what the missing values would be: 4000 mL 4 L m- c- d- da- h- k- 8000 mL 8 L m- c- d- da- h- k-

Lets add numbers to that chart.

If I buy 4000 mL of milk, it means I am buying 4L

Do you see a pattern?

Now guess what the missing values would be:

Metric Conversions Notes How about if we start at a different place. Can you still complete the pattern? 250 000 cg 25 000dg 250 dag 2 500 000 mg 2.5 kL 2500 g 25 hg m- c- d- da- h- k-

How about if we start at a different place. Can you still complete the pattern?

Metric Conversions Notes Metric Conversions Notes Notice that the number of “conversion jumps” from centimitres to metres… … Is the same number of “decimal jumps” and in the same direction. 85 cm = 0.85 m km hm dam m dm cm mm … and some times you have to fill in the zero’s

Notice that the number of “conversion jumps” from centimitres to metres…

Metric Conversions Notes Notice that the number of “conversion jumps” from litres to mililitres… … Is the same number of “decimal jumps” and in the same direction. 4 L = 4000 mL kL hL daL L dL cL mL … and some times you have to fill in the zero’s

Notice that the number of “conversion jumps” from litres to mililitres…

Metric Conversions Notes Metric Conversions Notes Notice that the number of “conversion jumps” from centimitres to metres… … Is the same number of “decimal jumps” and in the same direction. 9.5 g = 0.0095 kg kg hg dag g dg cg mg … and some times you have to fill in the zero’s

Notice that the number of “conversion jumps” from centimitres to metres…

So remember: King Henry Dropped Over Dead Converting Metric