Question

1. Grade VII students wanted to know if which will dissolve faster, the crush or the uncrushed salt. They then prepared the things needed for the experiment. They got 3 teaspoon of salt, they crush its one teaspoon and did nothing to the other towo remaining teaspoons. They got 3 the same size transparent bottles labelled bottle A, B, and C and poured 50mL water in each bottle. They added one teaspoon of crushed salt in bottle A, stirred it in normal pace , another one teaspoon salt on bottle B, still stirred it in normal pace , and one uncrushed teaspoon salt on bottle C and let the salt dissolved without stirring. They then record the time it took the salts tin the three sets up got dissolved. Get the variables and groups:
a. Title of the problem
b. Dependent Variable.
c. Independent variable
d. Constants (As many constants you can give)
e. Experimental Group.
f. Negative Control group.
g.Positive control group​

Answer 1

Explanation:

Sugar dissolves faster in hot water than it does in cold water because hot water has more energy than cold water. When water is heated, the molecules gain energy and, thus, move faster. As they move faster, they come into contact with the sugar more often, causing it to dissolve faster.