1. Matter is more useful because weight is the amount of gravitational force the earth has on your body. If you went to the moon you would weigh less because the moon is smaller so therefore it has less gravitational pull. But mass is a measure of how much matter you or an object is made of. so if you went to the moon and calculated the amount of mass your body has, it would be the same on earth.
2. 619.65 centimeters cubed
3. "unit of mass" per "unit of volume cubed"
4. mass/volume=density
5. length*width*height=volume
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