Which of the following is NOT true of all neutral atoms? same number of protons
neutrons in the nucleus
protons in the nucleus
Electrons are moving in an orbital cloud area

Liquid water turns into water vapor at which step in the water cycle? a. precipitation o b. water run off c. evaporation d. condensation

The vaccine in a flu shot contains weakened flu viruses. how does a flu shot work with the immune system? a. it destroys lymphocytes. b. it destroys macrophages. c. it activates macrophages. d. it activates lymphocytes.

Speed is the ratio of the distance of an object moves to