This document discusses classifying, which is grouping or ordering objects or events into categories based on similarities, differences, and relationships. There are three main types of classification: single stage classification which separates objects into subsets based on one property; multistage classification which creates layers of subsets by further separating initial subsets; and serial ordering which arranges objects in order based on the extent of a certain property. The document provides tips for classifying objects or events which include observing properties, dividing into groups, and diagramming the classification.

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BASIC SCIENCE
PROCESS SKILL:
CLASSIFYING

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Classify objects and events
according to observable
characteristics.

4. OBJECTIVES
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Define what is classifying
Identify the different types of
classifying

5. CLASSIFYING
Grouping or ordering
objects or events into
categories based on
similarities,
differences and
interrelationships.
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6. TYPES OF
CLASSIFICATION
Single Stage
Classification- involves
separating a set of
objects into two or more
subsets based on at least
one observable property.
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8. TYPES OF
CLASSIFICATION
• Multistage Classification- sets are
sorted into subsets, then each of those
subsets is sorted again and again. This
creates several layers, or stages, of
subsets.
• Example: Animals that may have been
grouped as vertebrates may be separated
again into groups of reptiles, birds,
mammals, fish, and amphibians. These are
all subsets of vertebrates. 8

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10. TYPES OF
CLASSIFICATION
Serial Ordering- objects are
placed in order by the extent to
which they have a certain
property. For example, rocks
may be placed in order from
smallest to largest or lightest to
heaviest.
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12. HOW GOOD ARE YOU AT CLASSIFYING
OBJECTS OR EVENTS? FOLLOW THESE
TIPS.
1. Observe a set of objects or
events. Think of their proponents or
characteristics.
2. Divide the set into two or more
groups based on one observable
property.
3. Divided the objects or events
based on a second observable
property.

13. •4. Repeat number 3
using another
observable property.
•5. Show the
classification using a
diagram.

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