Discovery Education: Mass & Weight
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Matter is anything that has mass and takes up space. Therefore,
mass is one property that all matter has. Volume, or the amount of
space that something takes up, is also a property of all matter.
Mass is the amount of matter in a substance. Weight is the pull of
gravity between masses. Objects on Earth have weight because there
is a gravitational attraction between their mass and Earth’s mass.
Objects with more mass have a larger weight because their
gravitational attraction to Earth is stronger.
Mass is measured with a balance. The SI unit for mass is the
kilogram, but mass may also be measured in grams. Weight is
measured with a spring scale. The SI unit for weight is the newton.
Weight is also measured in pounds and ounces.
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5.5. If you traveled to the moon, your body would not change, so your
mass would stay the same. However, your weight would be different
because gravity is different on the moon. Your weight on the moon is
less than your weight on Earth.
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7. False
8.The mass of an object is always equal to the mass of all of its parts.
For example, suppose you buy a toy that has to be put together. If
you found the mass of every piece and added those masses
together, that total would be the same as the mass of the completed
toy. The idea that the mass of an object is the same as the mass of
all of its parts is called the law of conservation of mass.