NAME______Answer Key__________Date__________________ HOMEROOM_____________________ SCIENCE Answer Key week of 11/17 Relax! Take a deep breath! Count backwards from 10! Now take your quiz! 1. Which of the following is a way chemical properties are used? a) Separating metals using magnets b) Filtering sand from water c) Breaking down materials around fossils d) Removing carrots from soup 2. Chemical properties can be used to separate some mixtures. (Chemical, gas) 3. A solution is a uniform mixture of two substances. (solution, base) True or False 4. True Heat and carbon are used to release iron from ore 5. False Weak acids react more easily with materials than do strong acids and bases. 6. True Lemon juice and vinegar are acids 7. How might a scientist do and experiment to tell whether a substance is a base or an acid (1 point) A scientist could test the substance using an indicator or the universal indicator paper 8. How might a scientist distinguish between strontium chloride and potassium chloride? (1 point) The scientist could use a flame test to distinguish between strontium chloride and potassium chloride. Strontium chloride will burn reddish orange and potassium chloride will burn bluish purple. 9. What color do you think indicator would turn if it were dipped in shampoo? Explain your answer. (2 points) Shampoo will turn the indicator blue, green, or purple. Shampoo is a base like other common household cleaning products. It is slippery and tastes bitter. Bases generally turn the indicator paper blue, green, or purple.