1. Natural or Man-made? Cotton Wood Concrete Glass Stone Plastic Gold
Leather

2. Wood...
...is a natural material that is taken from trees. Wood has been used by humans to make things for thousands of years.

3. Glass...
...is a material that is made by heating various powders. Glass is mainly used by humans because of its transparent quality.

4. Cotton...
...is a natural material that comes from the cotton plant. It is spun into yarn and used to make clothes.

5. Gold
Although gold is usually cleaned and reshaped, it is a natural material that can be found by mining in the ground.

6. Leather...
... is made from animal skin (usually cow) through a process called tanning.

7. Plastic...
... is a very modern material that can be made into any shape. It is widely used by humans because it is so cheap to produce.

8. Stone...
... or rock is a natural material that can be found almost everywhere. It is used by humans because it is hard and strong.

9. Concrete...
... is used more than any other man-made material in the world. It has been used for building since before the Egyptian pyramids were constructed.