The Most Important Material Ever Made

Why were early magnifying glasses called "lenses"?

• They were shaped like the human eye.

• They were made from a material found in lentil beans.

• Their shape resembled lentil beans.

• They were used to examine small insects, like lentils.

How did the invention of the printing press affect the use of glasses?

• It made glasses cheaper to produce.

• It increased the number of people who needed glasses for reading.

• It allowed for the creation of stronger glass for lenses.

• It made books easier to read without glasses.

Who significantly improved the microscope by grinding his own lenses, allowing him to see human cells?

• Hans Lippershey

• Galileo Galilei

• Antonie van Leeuwenhoek

• Robert Hooke

What process makes glass more durable by replacing smaller atoms with larger ones in its structure?

• Heating the glass to extremely high temperatures.

• Submerging the glass in a potassium salt solution.

• Adding an aluminosilicate base to the glass.

• Polishing the glass with abrasive materials.