Worksheet: Using Classification Keys

In this worksheet, we will practice on how to use classification keys to identify and group a variety of living things.

Q1:

Scientists classify living things according to their traits.

Which of the following is the correct definition for the word trait?

  • AThe environment an organism lives in
  • BA type of adaptation
  • CA distinguishing characteristic
  • DThe way the organism behaves

Q2:

Which is the largest kingdom?

  • AAnimals
  • BFungi
  • CProtists
  • DEubacteria

Q3:

The animal kingdom is divided into two groups, vertebrates and invertebrates.

What is a vertebrate?

  • AAn animal that does not have a backbone
  • BAn animal that has a skeleton
  • CAn animal that has a backbone
  • DAn animal that does not have a skeleton

Q4:

Identify which group this animal belongs to using the given key.

  • ABird
  • BAmphibian
  • CReptile
  • DFish
  • EMammal

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