Question 4 Which of the following is a physical change?
butane gas burns
leaves are composted
silver jewelry turns black
o egg solidifies upon cooking
fruit is dehydrated

Particle model to predict what will happen if a sharp object creates a hole in the soccer ball

Which statement is usually true about the relationship between activation energy and reaction rates? low activation energy barriers result in low rates. high activation energy barriers result in low rates. low activation energy barriers result in no reaction. high activation energy barriers result in no reaction.

Particles vibrate in a rigid structure and do not move relative to their neighbors.