Put these writing materials in order (from the oldest to the newest).
Writing in the mud
Writing on stones and bones
Writing on bamboo slips and silk in China
Cai Lun's new paper in the East Han Dynasty
What happened in the story?Put them in order.
People wrote on heavy or expensive materials.
Cai Lun made a better way to make paper.
The art of Paper-making art travelled around the world.
By the 19th century, paper was made from cheap wood.
Which material is better for writing?Put them in order (from "not perfect" to "perfect").
Mud (washed away by rain)
Stones and bones (hard and heavy)
Bamboo slips (too heavy) and silk (too expensive)
Paper (light and cheap)