1. False
2. False
3. False
4. False
5. True

1. Chewing gum base is made of sap or resin of trees, but bubble gum base is more elastic that’s why you can make bubbles with it.
2. They add natural or artificial sugar, vegetable oil and flavoring to make it more sweet and chewy.
3. Because the heat in our mouth makes it soft.
4. Scientists found prehistoric birch bark tar that had teeth marks on it.
5. Chicle is the sap of sapodilla tree. The ancient Maya Indians of Mexico chewed chicle.
6. To make it taste better.
7. In 1888, in New York a gum was sold in a vending machine for the first time.

Sap=Liquid from a plant or tree
Catalyst=Something that causes change
Artificial=Not natural
Elastic=Able to stretch easily and return to normal shape
Bark=Outer covering of a tree
Tar=A black, sticky substance
Prehistoric=Before history was written down
Relieve=Lessen or remove pain or discomfort
Invent=Create, make something new
Coating=Thin layer or covering
Settler=A person who comes to live in a newly developed country
Vending=Selling

1․ Artifical
2․ Vending
3․ Relieve
4․ Settlers
5․ Elastic
6․Sap

1. There are people who chew gum just for the taste, there are people who just like to chew. I really like to chew gum for no reason at all.
2. Yes, school kids can chew, but not during class․
3. No, each person decides for himself what to do, if he wants to chew, then let him chew.
4. I don’t know, I can’t say․
5. Yes, because the body, the brain thinks that you are eating bread while chewing.

discuss the pre-reading questions