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Grades 6, 7 and 8 - Science - Middle School - Chemicals - Helpful and Harmful
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Avg score: 80% Most missed: “Which of the following is NOT a harmful chemical found in tap/drinking water?”
Depending upon how they are controlled, handled and disposed of can make chemicals helpful or harmful. SOME HELPFUL CHEMICALS Antibiotics (such as penicillin) - Helps to fight infections. Sodium Chloride (table salt) - This is an important mineral that the body needs. Cornstarch - This is made from ground corn and contains multivitamins. Vinegar - For cuts and bruises, vinegar acts as an antiseptic. Baking soda (sodium bicarbonate) - Reduces stomach acids that cause indigestion. SOME HARMFUL CHEMICALS The five most harmful chemicals in tap water. Chlorine - Yes, chlorine that is... Show more
Grades 6, 7 and 8 - Science - Middle School - Chemicals - Helpful and Harmful
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10 Questions

1. Chemicals are found in ________.
2. This type of chemical helps to fight infection.
3. Which of the following is NOT a helpful chemical?
4. Which of the following is NOT a helpful chemical?
5. Chemicals are found in the form of _______.
6. This acts as an antiseptic on cuts and bruises.
7. Which of the following is NOT a harmful chemical found in tap/drinking water?
8. This type of chemical helps to fight infection.
9. This chemical gets into drinking water through pipes.
10. This chemical seeps into the soil, making its way into groundwater and then into drinking water.