Isotope 3 – 45 amu (% abundance)

Arollercoaster car at the top of a hill has potential energy kinetic energy chemical energy light energy

Which characteristics can be used to differentiate star systems? check all that apply.

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.