Natural and Man-made Materials Notes & Questions | Class 5 Chemistry | Drishti OS

Natural and Man-made Materials

What you'll learn

Natural materials occur in nature — wood, cotton, wool, clay, stone, rubber (from rubber trees).
Man-made (synthetic) materials are manufactured in factories from chemicals — plastic, nylon, polyester.
Some objects use a natural raw material that is processed into a new man-made product — paper from wood pulp, glass from sand.
To connect with everyday material sorting activities.

Key concepts

Level 1 — Two big groups of materials

Verbal: Every material either comes straight from nature (natural) or is made by people using machines and chemicals (man-made).

Symbolic: Natural → from a plant, animal, or the earth. Man-made → manufactured/synthesised.

Material	Group	Source
Wood	Natural	Trees
Cotton	Natural	Cotton plant
Wool	Natural	Sheep
Plastic	Man-made	Chemicals from petroleum
Nylon	Man-made	Synthesised in factory

Everyday link: Sorting a school bag's contents into natural and man-made materials.

Level 2 — Tricky cases: processed natural materials

Verbal: Paper starts from wood (natural) but is processed in a factory, so we call the finished paper a man-made product made from a natural raw material.

Real-life: Glass is made by melting sand (natural) with other ingredients — the sand is natural, but glass itself is man-made.

Product	Raw material	Is the finished product natural or man-made?
Paper	Wood pulp	Man-made (processed)
Glass	Sand	Man-made (processed)
Cotton shirt	Cotton fibre	Natural (fibre barely changed)
Wool sweater	Sheep wool	Natural (fibre barely changed)

Worked example

Is a plastic ruler natural or man-made? Why?

Step 1 — Plastic is made from chemicals in a factory.
Step 2 — It does not occur ready-made in nature.
Answer: Plastic is a man-made (synthetic) material.

Is paper natural or man-made?

Step 1 — Paper starts from wood pulp, a natural raw material.
Step 2 — Factories process the pulp into sheets of paper.
Answer: Paper is a man-made product made from a natural raw material.

Common mistakes

Mistake	Why it happens	Fix
Paper is natural because it comes from trees	Confusing raw material with final product	The wood is natural; the processed paper is man-made
All soft things are natural	Judging by feel, not source	Polyester cloth is soft but man-made
Glass is natural because sand is natural	Ignoring the manufacturing step	Sand is natural; glass is man-made
Rubber is always man-made	Forgetting natural rubber trees	Natural rubber comes from rubber trees; synthetic rubber is man-made

Quick check

Give two examples each of natural and man-made materials.
Is nylon natural or man-made?
Why is paper considered man-made even though it comes from wood?
Stretch: Name one material that is hard to classify and explain why.

Revision tip: Sort five objects from your school bag into natural and man-made columns.

Open the Practice tab for graded questions on Natural and Man-made Materials.

Natural and Man-made Materials