Which of the following is NOT an example of a chemical change? * O Corrosion
O Grinding
O Combustion
O Rust

Which of the following best describes the formation of plasma?

When a spring is compressed, the energy changes from kinetic to potential. which best describes what is causing this change?

Clyde and marilyn are riding a roller coaster. during which section(s) of the track is their potential energy converted to kinetic energy? a. from point b to point c only b. from point b to point d only c. from point a to point b only d. from point a to point b and from point c to point d