KS3 Biology › Species and classification (differences between species)

Classification and Species

A horse and a donkey can have a foal together, so why aren't they the same species? Because the mule they produce can't have foals of its own. Fertile offspring is the test — and it's a rule with some awkward exceptions, which is what makes it interesting.

KS3 Biology · Year 7–9 · Free worksheet with answers

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What you'll be able to do after this lesson

These are the points the worksheet questions are built around.

Explain what classification is and why scientists sort organisms into groups
Name the seven levels of classification in order from kingdom to species
Define a species and explain what fertile offspring means
Write a binomial name correctly and explain the rules for doing so
Name the five kingdoms and give an example organism from each
Explain the difference between vertebrates and invertebrates

Free worksheet — 3 questions, 13 marks

One page with a full answer key. Enough to check the lesson landed, and to see how the questions are written before you buy anything.

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Take it further

Every resource comes with a full answer key and marking guidance. Instant download, yours to keep, print as many copies as your class needs.

Full worksheet

£3

17 questions, 100 marks
Three sections of increasing difficulty
Word banks on every fill-in-the-blank
Complete answer key

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Extension pack

£3

Vocabulary matching
Challenge quiz
Case study
Teach It Back, with rubric

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Complete lesson pack

£5 £6

The full worksheet and the extension pack together
Both answer keys included
Everything for the lesson and the follow-up — no preparation required
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Using this with a class

You're welcome to embed the video and link these resources in Google Classroom, Stile, Canvas, Compass or any other school platform. No need to ask.

Everything here is written to the KS3 curriculum for students aged 11–14. Print freely for the classes you teach.

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