North Dakota A+ Science Grade 4 Practice Questions - North Dakota A+ Summative Science - Grade 4 Exam

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A cart rolls along a track and bumps into a stationary block of wood. The block slides forward after the collision. What best explains what happened?

Energy was transferred from the moving cart to the block during the collision. The block created its own energy to start moving. The cart's energy disappeared completely when it hit the block. The block was pulled forward by gravity from the cart.

Correct Answer:

Energy was transferred from the moving cart to the block during the collision.

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