material

1. man-made

1.1. nylon

1.2. glass

1.3. plastic

1.4. styrofoam

2. natural

2.1. tin

2.2. gold

2.3. grantie

3. plant

3.1. wood

3.2. cotton

3.3. rubber

4. animals

4.1. silk

4.2. wool

4.3. leather

5. properties

5.1. strong

5.1.1. ability to withstand heavy load without breaking

5.2. hard

5.2.1. ability to withstand scratches

5.3. elastic

5.3.1. ability to stretch up to a certian point without breaking

5.4. flexible

5.4.1. ability to bend up to a certain point without breaking

5.5. waterproof

5.5.1. inability to absorb water

5.6. poor conductor of heat

5.6.1. ability to slow down heat gain or heat loss

5.7. electrical insulators

5.7.1. inability to allow electricity to pass through