History of Gum

Prehistoric men and women chewed on lumps of tree resin.

• true

• false

connection; something in common

• breakthrough

• resin

• link

• spruce

Thomas Adams began experimenting wtih ______ resin from sopadilla trees.

Fascinating means very ____________.

Dentyne gum came out promising to help dental ________.

• healing

• health

• hygiene

An important progress or major development

sticky brownish substance that oozes from trees

• resin

• sapodilla

• chiclets

relating to or denoting the period before written records

• ancient

• prehistoric

• Biblical

• old

A __________ is a physical material from which something is made.

The article "The History of Gum" is non-fiction.

• True

• False