Skin Care

Question 1

what is the reaction ultraviolet light has on the body?

Answer 1

UV light is high-energy which can break bonds within molecules, this causes skin damage, sunburn, ageing, and cancer.

Question 2

Free radical

Answer 2

A free radical is an atom (or molecule) that is highly reactive as it has an unpaired electron eg. -H

Question 3

What are the steps in a chain reaction?

Answer 3

1. Initiation
2. propagation
3. Termination

Question 4

Describe the steps in a chain reaction

Answer 4

Initiation:
- All the free radicals will be on the products side.
Propagation:
- There will be a free radical on both the products and reactants side.
Termination:
- Both free radicals will be on the reactants side.

Question 5

Free Radical Scavengers

Answer 5

These are molecules that react with free radicals to form stable molecules. They are added to skin care products, cosmetics, plastics and food to prevent any chain reactions from occurring (eg. stops bonds from breaking in your skin)