KSA Science Grade 7 Practice Questions - Kentucky Summative Assessment Science - Grade 7 Exam

What happens to the molecules of liquid water when thermal energy is added to heat it to its boiling point?

The molecules slow down and pack more tightly together The molecules gain kinetic energy, move faster, and spread further apart The molecules break apart into hydrogen and oxygen gas atoms permanently The mass of each individual water molecule increases significantly

Correct Answer:

The molecules gain kinetic energy, move faster, and spread further apart

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