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Grades 6, 7 and 8 - Science - Middle School - Chemistry - Acids and Bases
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Avg score: 76% Most missed: “This helps to reduce the amount of acids found in foods.”

The word acid is derived from the Latin word acere which means “sour.” Acid itself is a corrosive metal. However, in foods when mixed with various bases, its harmful effects are diminished even eliminated and leave only a sour flavor. To test to see if a food compound contains acids, a piece of litmus paper is used by dipping the litmus into compounds. If the litmus paper then turns red, the compound contains acids.

Bases in foods can appear to feel slippery. They help to reduce the amount of acids found in foods. When testing for bases, the litmus paper will turn blue.

Grades 6, 7 and 8 - Science - Middle School - Chemistry - Acids and Bases
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10 Questions

1. Egg whites have a pH level of ___.
2. When testing for _____, the litmus paper will turn blue.
3. Rainwater has a pH level of __.
4. These are either an atom or a molecule that has acquired an electrical charge.
5. An example of a base would be ________.
6. This helps to reduce the amount of acids found in foods.
7. This helps to reduce the amount of acids found in foods.
8. The word “acid” means _____.
9. The concept that bases can make acids weaker is known as _________.
10. When testing for acids, the litmus paper will turn ____.