Science H.W(4/5/17)

Note: For tomorrow’s competition bring:
1. Rough Cloth
2. Apron / Lab coat
3. Old Socks / Gloves
4. Acrylic colours , brushes / Mehndi cone

Comprehension Task:
Answer the following questions in NB1.
1. What are polymers?
2. Name the natural polymer found in cotton.
3. From where is rayon obtained?
4. How is nylon prepared?
5. Is nylon stronger than steel wire?
6. What is the main characteristic of polyester?
7. What are esters?
8. State one disadvantage of synthetic fibre.
9. What are petrochemicals?
10. What is a plastic?
[Time 25 minutes MI: Verbal RBT: Knowledge]


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