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This week we’ll look at density. Density is a measurement of how solid something is. Specifically it is the mass per unit volume of a substance. If you have two objects of the exact same size (volume), the more dense object will weigh more than the less dense object.
What is mass?
Mass is a measurement of how much matter is in an object. Mass is a combination of the total number of atoms, the density of the atoms, and the type of atoms in an object.
Mass is usually measured in kilograms which is abbreviated as kg.
What is volume?
Volume refers to the amount of space the object takes up. In other words, volume is a measure of the size of an object, just like height and width are ways to describe size. If the object is hollow (in other words, empty), volume is the amount of water it can hold. Try this at home: Take a large cup and a small cup. Fill the small cup with water, then pour the water into the big cup. Since the amount of water that filled the small cup is not enough to fill the large cup, what can you figure out about the volume of the cups? The smaller cup has less volume!
When you use a measuring cup while cooking, you are measuring the volume of liquids or solids.
Measuring cup
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