Paper Without Glue: teacher key

How Paper Is Made, grade 7 edition, written for 7th grade. How fibers bond themselves, and why paper's story is older and stranger than one inventor.

Read the book. Print this page for the key.

Questions and answers

Why does paper usually need no added glue?
- It is sealed with wax
- Wet fibers form links that stay bonded as the paper dries (answer)
- It is woven like cloth
How is papyrus made?
- By cooking wood chips
- By weaving cotton
- By pounding crossed layers of reed strips (answer)
What kind of pulp uses about 12 trees for a ton instead of 24?
- Kraft pulp
- Mechanical pulp or newsprint (answer)
- Cotton pulp
Why does Cai Lun's title as inventor deserve care?
- Paper-like fragments from China are older than he was (answer)
- He lived in Egypt
- He never made paper
What does slurry mean here?
- A watery mix of fibers (answer)
- A kind of glue
- A paper roll