1st group
Which chemical element produces green fireworks?
Barium (Ba)
What three things do fireworks produce when chemical energy is released?
Heat, light, and sound.
What is an exothermic reaction?
A chemical reaction that releases energy to its surroundings.
What causes the loud boom we hear during fireworks?
Hot gases expand rapidly and create a pressure wave.
Why do we see the flash of fireworks before hearing the sound?
Because light travels much faster than sound.
What happens to electrons when atoms receive heat energy?
Electrons move to higher energy levels. When they return to lower levels, they release light.
Why do different chemical elements produce different colors in fireworks?
Different elements have different electron energy levels, so they emit different colors of light.
Why do the golden and silver trails of fireworks slowly disappear?
The glowing metal particles gradually cool down and stop producing light.
Why is producing blue fireworks more difficult than producing red or yellow fireworks?
The copper-containing substances responsible for blue light are sensitive to high temperatures and can break down.
How do chemistry and physics work together to create the light, colors, and sounds of fireworks?
Chemistry explains how reactions release energy and produce colored light. Physics explains how light travels and how expanding gases create sound.