9 units of mass equivalents in a
fun online physics learning game.

"Weight Units" is a free online knowledge level game to sort the units of mass (grams) by their equivalents. Minute to win it game. Physics learning game, suitable for online classes and interactive lessons. Fun physics educational game to explore and study the orders of weight magnitude and the metric system of measurements of mass. Part of the Interactive Physics Workshop educational tools. Online physics educational game. Free online game for physics homework.

There are 9 base units of mass, marked by the multiples weight symbol, situated on the left side of the screen. Drag and drop them in their equivalent value in the blank sockets of the orange pyramid to the right of the screen. For example, go with the mouse over the round orange circlet with 1mg. Click and hold the left mouse button and carry the circlet where 1000 micrograms is. Sort all 9 units of mass to win the game.

The weight of an object is mass multiplied by gravity. The basic weight unit is the gram (g), using the The Metric System of Measurements of mass. In modern scientific usage, weight and mass are fundamentally different quantities: mass is an intrinsic property of matter, whereas weight is a force that results from the action of gravity on matter: it measures how strongly the force of gravity pulls on that matter and this force is measured in Newtons. However, in most practical everyday situations the word "weight" is used when, strictly, "mass" is meant. For example, most people would say that an object "weighs one kilogram", even though the kilogram is a unit of mass. Here are multiples of the mass:

1 microgram (µg) = 1000 nanograms
1 milligram (mg) = 1000 micrograms
1 centigram (cg) = 10 milligram
1 decigram (dg) = 10 centigrams
1 gram (g) = 10 decigrams
1 decagram (dag) = 10 grams
1 hectogram (hg) = 10 decagram
1 kilogram (kg) = 10 hectogram
1 megagram (Mg) / ton (t) = 1000 kilogram