Ms. mayo challenged her students to build a pendulum that would hit a block of wood and make it travel the farthest distance. the group that moved the block of wood the most would win a prize. one group's experimental data is shown above. what comment would you make about the group's manipulated variable?

explanation: it gains negative electrons, therefore becoming negatively charged. as charge cannot be created, nor destroyed, only transferred, this leaves the wool positive. now that they have opposite charges, the two items attract.

a chemical change results in a new substance being formed; whereas a physical change will result in a different state of matter

explanation: