Unit 4 Classifying Living Things worksheet - Free Printable

Let's solve this worksheet step by step.

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1. What groups do these living things belong to? Colour the pictures.

We are given five images:

1. Mushrooms → These are Fungi
2. Bacteria (microscopic organism) → This is a Bacteria
3. Seaweed or coral-like structure → This is Algae
4. Potted plant → This is a Plant
5. Fish → This is an Animal

So, match each image with the correct group:

- Mushroom → Fungi
- Bacteria → Bacteria
- Seaweed/coral → Algae
- Potted plant → Plants
- Fish → Animals

> ✔ Answer for Question 1:
>
> - First image (mushroom): Fungi
> - Second image (bacterium): Bacteria
> - Third image (seaweed): Algae
> - Fourth image (plant in pot): Plants
> - Fifth image (fish): Animals

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2. Match the groups of living things with the definition.

Now let’s match the letters (a–e) with the correct definitions (1–5).

#### Given options:
- a) Animals
- b) Plants
- c) Algae
- d) Fungi
- e) Bacteria

#### Definitions:
1. They can inhabit both fresh and salt water. They can be microscopic or measure many meters long.
2. They do not make their own food. They live everywhere (in air, in water, in soil, on plants, on animals). They can’t move about.
3. They can move about. They can’t produce their own food. They have to eat other living things.
4. They use the energy from the Sun, water and minerals from the soil and carbon dioxide from the air to produce their own food. They can’t move about.
5. They are the simplest of creatures that are considered alive. They are everywhere. They are in the bread you eat, the soil that plants grow in, and even inside of you.

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Let’s analyze each:

#### a) Animals → Definition 3
- Animals move around.
- They don't make their own food → heterotrophs.
- They must consume other organisms.
✔ Match: a → 3

#### b) Plants → Definition 4
- Use sunlight (photosynthesis).
- Make their own food.
- Can't move.
✔ Match: b → 4

#### c) Algae → Definition 1
- Algae live in water (fresh and salt).
- Some are microscopic, others (like kelp) can be very large.
- They perform photosynthesis.
✔ Match: c → 1

#### d) Fungi → Definition 2
- Don't make their own food → decomposers or parasites.
- Live in various environments (air, soil, on plants/animals).
- Can't move.
✔ Match: d → 2

#### e) Bacteria → Definition 5
- Simplest living organisms.
- Ubiquitous — found in soil, food, inside bodies.
✔ Match: e → 5

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✔ Final Answers:

#### Question 1:
- Mushroom → Fungi
- Bacterium → Bacteria
- Seaweed → Algae
- Plant → Plants
- Fish → Animals

#### Question 2: Matching
| Letter | Group | Definition Number |
|--------|-----------|-------------------|
| a | Animals | 3 |
| b | Plants | 4 |
| c | Algae | 1 |
| d | Fungi | 2 |
| e | Bacteria | 5 |

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🔍 Summary Explanation:

- Plants and Algae are autotrophs (make their own food via photosynthesis), but algae are mostly aquatic and simpler than plants.
- Animals and Fungi are heterotrophs (eat other organisms), but fungi don’t move and absorb nutrients; animals move and hunt/consume.
- Bacteria are tiny, simple life forms found almost everywhere and play key roles in ecosystems.

This classification helps students understand how living things are grouped based on characteristics like nutrition, movement, and habitat.