North Dakota A+ Science Grade 8 Practice Questions - North Dakota A+ Summative Science - Grade 8 Exam

Question 1

The particles in a solid are packed closely together and vibrate in fixed positions. Which statement best explains why a solid keeps its own shape rather than flowing like a liquid?

The particles are held in place by strong attractive forces that keep them in fixed positions The particles move so slowly that gravity holds each one to the ground The particles are locked together by magnetic fields from Earth's core The particles have no energy of motion at all, so they cannot move past one another

Correct Answer:

The particles are held in place by strong attractive forces that keep them in fixed positions

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