Which of the following is an example of a hypothesis? A a controlled test of gravity’s effect on objects B I know I won’t get a completion grade unless I finish my homework. C the variable factor of weight in Galileo’s experiment D If teeth are exposed to sugar, then they will get cavities.

Julia would be observing a. static electricity was caused by her sweater rubbing against her shirt and transferring electrons. she didn't touch anything metal, so that would cancel out b.she most likely didn't rub her sweater against her hair either, so that cancels out c.she also didn't scoot across the carpet while trying to take her sweater off, that cancels out d.so that leaves a.a. is correct.

I'd go for the one that says that knees are fulcrums, lower legs are levers and the ankles hold loads.hope it ,happy homework/ study/ exam!