1) What is the best main idea sentence for this passage? a) Sand is used to make glass. b) Safety glass is used in cars. c) A glass blower can blow into a pipe and shape a gob of glass. d) Glass is very useful! 2) What makes tempered glass strong? a) lime b) heat c) soda d) cullet 3) About how long does it take to melt a big batch of glass? a) About a day b) About an hour c) About two days d) About a week 4) Sometimes, an artist such as a glass blower will blow glass into shapes. What is used to create mass-produced glass products in factories? a) a machine that blows the glass b) Robots assemble the glass c) Adding soda and lime d) It's quite smashing to learn about glass.

Made of Sand

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