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montgomerykarloxc24x
31.07.2019 •
Biology
Susie places 3 beakers in the freezer. the first beaker contains water only, the second contains water and salt, and the third contains a water and sugar solution. susie recorded the temperature and the time at which each mixture froze. which is the most appropriate hypothesis for her experiment? a) salt affects the freezing point of water. b) the addition of salt raises the freezing point of water. c) the addition of a sugar lowers the freezing point of water. d) the addition of different substances affects the freezing point of water.
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Ответ:
D) The addition of different substances affects the freezing point of water.
Explanation:
The best answer would be letter D.
The short explanation would be, the other choices only involves the addition of 1 substance (salt or sugar).
The long explanation:
Susie is testing two types of solution: sugar + water and salt + water. This means that she is testing the effect of both. An experiment is done to test certain variables and an addition of a variable that is not being tested is not advisable. But since she intentionally used both solutions, then it is reason enough to assume that she is testing both substances (sugar and salt) so the hypothesis should include both as well.
Ответ:
Explanation:
there is no graph