The pressure of a gas decreases with increasing temperature.
A. True
B. False

Protons and neutrons are found within the nucleus of an atom

Which of the following correctly describes what happens when an atomic bomb explodes? small pieces of fissionable material are joined and form a body with a mass greater than the critical mass, the relative number of neutrons escaping decreases, and a chain reaction and explosion result. large pieces of fissionable matter are brought together quickly and form a body with a mass smaller than the critical mass, the relative number of escaping neutrons increases, and a chain reaction and explosion result.

Give one example to show that when substances are mixed,it may result in a chemical or a physical change depending on the conditions.