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For Every Object, A Group

Vocabulary
 challenging words: mega, quantitative, capability, suede, classification, hierarchy, placement, soles, analyze, classify, based, further, rank, material, absence, separate

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 For Every Object, A Group By Trista L. Pollard

1     Just like everything has its place, every object and event belongs in a group. How do we know? We know this fact through the science process skill called classification. Scientists use classifying to learn information about objects and events.

2     There are many different ways to classify objects. When scientists classify objects, they look at the properties of those objects. Scientists use the absence or presence of those properties in objects to determine their placement into groups. When you were in kindergarten, you could classify objects into one group, maybe based on size. Think about the blocks you played with in class. You probably put them into groups called "big blocks" and "little blocks." As you have aged, you now are able to see that objects can be classified into more than one group at a time. For example, let's look at sneakers. As you know, there are many different varieties and brands that exist on the market today. However, all sneakers have one thing in common - rubber soles. The material used to make the soles for sneakers is considered a specific property of sneakers. We could examine sneakers further and find that the material used for the uppers (the shoe part of the sneaker) varies. Based on the material, we could classify sneakers into three groups - leather, cloth, and suede. But why stop there? We could also classify sneakers based on style. You have low-top sneakers and high-top sneakers. You could go on classifying sneakers until each sneaker stands alone in its own group.

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