Q: When plants undergo photosynthesis, a reaction produces sugar, oxygen, and water. During respiration, stored energy from the products of photosynthesis is converted to usable energy. In what form is the energy stored prior to use in respiration?
A: chemical energy
Q: What determines how long the Moon takes to complete one cycle of phases?
A: the period of revolution of the Moon around Earth
Q: A student conducts an investigation. In order to make a valid conclusion, she must
A: have a testable hypothesis.
Q: What tool is used to determine the mass of an object?
A:
Balance