Jenny is trying to describe a wave. Which example would be the best description? a toy car hitting a wall and bouncing back
a toy car rear-ending a toy car that then rear-ends another toy car
two toy cars driving parallel to each other at the same speed
two toy cars driving away from each other at the same speed

3.09 lab: reaction of metals 1 which combinations of substances resulted in a chemical change? for each metal that participated in a chemical change, write the type of metal it is, based on your examination of the periodic table. were there any metallic compounds that did not react with either the acid or the base? write the type of metal, based on your examination of the periodic table. make a general statement about the reactivity of the metals in this experiment.