Weight is the amount of gravity it takes to hold an object to the ground. It change based upon the planet you are on. Mass is the amount of matter in an object. It does not change. With the metric system, we refer to our measurement as mass. With customary units of measurement, we refer to our measurements as weight.
Take some time to explore using the grams and kilograms. Play with the balance.
A real balance is best, but you can find a virtual balance here.
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Watch the following video to learn more about measuring with grams and kilograms.
Take some time to explore using the ounces and pounds. Play with the balance.
Let's learn about measuring weight using customary measurement. Watch the following video to learn more about measuring with pounds and ounces.
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Metric Measurement: Length (centimeters and millimeters)
Let's learn about measuring length using metric units of measurement.
Let's learn about measuring length using customary units of measurement.