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 way the organism behaves
  • BThe environment an organism lives in
  • CA type of adaptation
  • DA distinguishing characteristic

Q2:

Which is the largest kingdom?

  • AFungi
  • BProtists
  • CEubacteria
  • DAnimals

Q3:

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

What is a vertebrate?

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

Q4:

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

  • AFish
  • BMammal
  • CReptile
  • DBird
  • EAmphibian

Q5:

Which question could you ask to complete this branching key?

  • ADoes it have a long thin stem?
  • BDoes it have yellow petals?
  • CDoes it have three leaves?
  • DDoes it contain seeds?

Q6:

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

  • AReptile
  • BMammal
  • CBird
  • DAmphibian
  • EFish

Q7:

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

  • AFish
  • BReptile
  • CMammal
  • DBird
  • EAmphibian

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