Question

which of the following were invented during the han period? select the three correct answers.

□ paper

□ bicycles

□ iron plows

□ microscopes

□ seismographs

□ bronze swords

Explanation:

• Paper was invented by Cai Lun during the Eastern Han Dynasty.
• Improved iron plows were widely developed and used in the Han period.
• The first seismograph was created by Zhang Heng during the Han Dynasty.
• Bicycles, microscopes, and bronze swords predate or postdate the Han period (bronze swords existed earlier, bicycles/microscopes much later).

Answer:

• paper
• iron plows
• seismographs