Question

jose is a runner and wonders if his diet can help him run faster. he has heard a lot about carb loading before a race. what hypothesis would be good for him to test this theory?
a. proteins and carbs give the same amount of calories so what you eat doesnt make any difference.
b. fat has the most calories so eating fat will give you more energy to run.
c. if you eat 1000 calories of carbs the day before a race, then you will be able to run 10 seconds faster.
d. if you eat less than 2 hours before a race, you will run slower.

Explanation:

Jose wants to test if carb loading helps him run faster. A hypothesis should relate carb intake to running speed. Option C proposes a testable relationship between carb calories (1000, day before) and running time (10 seconds faster). Other options don't focus on carb loading's effect on running speed (A: no difference; B: fat; D: eating time, not carbs).

Answer:

C. If you eat 1000 calories of carbs the day before a race, then you will be able to run 10 seconds faster.