What happens when particles of a substance heat up? (mark the one best answer.)
The particles are compressed and become less dense
The particles expand and move faster
THe particles move faster and are farther apart
The particles slow down and have more collisions
The particles expand and move faster.
Amy wraps her dolls in blankets but can't understand why they dont warm up. Why dont they warm up?
The blankets she uses are probably poor insulators
The dolls are made of materials that don't hold heat well
The blankets she uses are pore conductors