A chemical reaction involves a change not in the atoms themselves but in the way atoms are combined to form compounds. The potential energy of a ball will increase as it rolls down a hill. Three statements illustrate chemical changes and one illustrates a physical change. Three statements illustrate physical changes and one illustrates a chemical change. Basketball player Shaquille O'Neal weighs 310.
Precision relates to how closely measurements agree with the true value.
Both the mass and the weight of an astronaut are less on the moon than on earth. Gases do not have a definite shape or volume. The viscosity of a liquid is a measure of its resistance to flow. Two statements are true. Three statements are true.