Which statement correctly describes a physical change? A.
involves breaking and creating chemical bonds but not changing a phase
B.
may involve a change in phase but does not involve a change in the molecular structure
C.
may involve converting two or more substances into new substances
D.
involves changes at the molecular level
E.
involves energy transfer and change in color

The diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

Which property of water causes water drops to bead on a freshly waxed car?

Which of your 24 wells had indications that a chemical reaction occurred? how were you able to tell that a chemical reaction occurred? which of your 24 wells had indications that a physical reaction occurred? how were you able to tell that a physical reaction occurred? report on both mixing and evaporation. make a general statement about whether your hypotheses were validated or rejected. must your hypotheses be correct for this to be a successful laboratory?