Question

Glue is used to bind one surface to another. Some glues are fairly weak, while others are extremely strong. The difference in strength is due to the ingredients used. How did glue get its start? Why does it work so well?

The first glues have been traced back to 4000 BCE when ancient humans used sticky material to fix broken pots. This glue was made from the resin of tree sap. During the same time period, some temple statues had glue as well. Tar-like glue helped hold statues’ eyeballs in place for 6,000 years! Scientists have proven that ancient humans used glues to make tools, art, and tombs.

The first written record of glue dates back to 2000 BCE. Humans were using animal glue at this time. The glue was made of bones, skin, and tissues. Ancient Romans and Greeks began to improve their glue-making processes. They started to use vegetables, grains, and beeswax in the glue. These ingredients were used until around 500 CE.

After that, those ingredients weren’t used in glue for almost 1,000 years. One exception was Genghis Khan, the leader of the Mongol Empire. In 1000 CE, Khan’s soldiers had the strongest weapons around. The glue that bonded the weapons’ pieces together is what made the weapons so strong.


Questions
Which of the following details supports the inference that glue can be toxic?

“This tar-like glue helped hold the statues’ eyeballs in place for 6,000 years!”

“Scientists have proven that ancient humans used glues to make tools, art, and tombs.”

“The glue that bonded the weapons’ pieces together is what made the weapons so strong.”

None of the above

Answer 1

None of the above.

The provided details do not directly support the inference that glue can be toxic. They mainly discuss the historical use and applications of glue without mentioning any health or safety implications.