---
title: "Evidence-Based Classification"
description: "Give reasons for classifying plants and animals based on specific characteristics, using evidence to justify classification decisions"
canonical: https://lightmysky.com/learn/science/evidence-based-classification-mt_B8lX8OCzGu
source: https://lightmysky.com/learn/science/evidence-based-classification-mt_B8lX8OCzGu.md
retrieved: 2026-10-19
---

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# Evidence-Based Classification

Give reasons for classifying plants and animals based on specific characteristics, using evidence to justify classification decisions

Subject: Science · Area: Ecosystems & Habitats · Ages 10 to 11
Page: https://lightmysky.com/learn/science/evidence-based-classification-mt_B8lX8OCzGu

## Ready when they can

- Classify an unfamiliar organism using specific observable characteristics with reasoning
- Compare two similar organisms and explain which characteristics distinguish their classification
- Justify a classification decision using at least two pieces of evidence from observation

## Lesson: Classify it, then prove it

You already know how plants make their own food and animals move to find food. When you tell someone what you found outside, they may ask how you know. A strong answer points to specific features you saw, not just a guess.

*(drawing: Follow these four steps: observe closely, compare features, match to a group, then justify your choice with evidence.)*

**Example.** Priya finds a creature with feathers and a beak with no teeth. She says it's a bird. Her evidence: feathers, since only birds have them, and a toothless beak that fits a bird. This task asks for two observations that agree. If two clues point to different groups, look at more features before you decide.

Breathing clues can trick you. Some fish take in oxygen through their skin, and swamp eels gulp air. The axolotl, an amphibian, keeps feathery gills all its life. So do not sort an animal on breathing alone. Pair it with a body clue you can see: fish have no legs, reptile skin has dry scales, amphibian skin is moist and bare, and only mammals feed their babies milk.

**Tip.** One feature is not enough here. Before you decide, find at least two things you observed that point to the same group.

**Recap.** Classify with evidence: observe closely, compare features, and give at least two reasons for your choice.

## Practice

24 questions on this page, each with its working shown.

## Needs first

- [Structures for Survival](https://lightmysky.com/learn/science/structures-for-survival-mt_8VA40Tumth)
- [Classifying Organisms](https://lightmysky.com/learn/science/classifying-organisms-mt_IY3KwGLZgk)

## Opens up

- [Grouping Species Using DNA](https://lightmysky.com/learn/science/grouping-species-using-dna-mt_fqAkSv3cUE)
- [Animal body plans: symmetry, cavities and the deep splits](https://lightmysky.com/learn/science/animal-body-plans-symmetry-cavities-and-the-deep-splits-mt_hEC72cvFQF)