What is the lecture mainly about?
A. New information about glass production and use in ancient Egypt
B. Whether Egyptians or Mesopotamians were the first to invent glass
C. Differences between Egyptian glass and other kinds of glass
D. Reasons why ancient Egyptians imported glass from other countries
The professor describes a process for making glass disks. Summarize the process by putting the steps in the correct order. Click on a sentence. Then drag it to the space where it belongs.
A.Glass-like material is ground up and dyed blue or red.
B.Powdered material is heated at very high temperatures.
C.Crushed quartz and plant ash are heated at low temperatures.
D.Containers are broken to remove glass disks.