6) What causes the stars to give off light when ignited?

When fireworks explode in the sky, the gunpowder reactions create a lot of heat, causing the metallic substances pres- ent in the stars to absorb energy from the heat and emit light. ... These electrons absorb energy from the heat, which causes them to move from their original ground-energy state to an excited state.

Explanation:

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When fireworks explode in the sky, the gunpowder reactions create a lot of heat, causing the metallic substances present in the stars to absorb energy from the heat and emit light. ... These electrons absorb energy from the heat, which causes them to move from their original ground-energy state to an excited state.

Explanation:

answers: to make sure that all of the broken pieces of tablet were added to the water, to allow for fair comparison of all three trials, with different particle sizes to avoid experimental error