In an experiment Investigating how far model airplanes with different shapes can travel, which of the following are variables that need to be
controlled?
a. type of wood used; mass of the planes, glue used: air currents and
breezes
b. whether the shapes look like real airplanes: how old the models are
c. what time the test starts: the time it takes for each test
d. whether the models land smoothly or become damaged during the
test

Astudent completed a lab report. which correctly describes the difference between the “question” and “hypothesis” sections of her report? “question” states what she is asking, and “hypothesis” states the result of her experiment. “question” states what she is asking, and “hypothesis” states what she thinks the answer to that question is in “if . . then . . because” format. “question” describes what she is trying to find out, and "hypothesis" states the procedures and methods of data collection. “question” describes what she is trying to find out, and “hypothesis” states any additional information or prior knowledge about the question.