If a Rocket Shell Packed with Fireworks Is Fired into the Sky

question 101

Multiple Choice

If a rocket shell packed with fireworks is fired into the sky and exploded,which of the following would produce a shower of white sparks?

• A)aluminum metal
• B)barium compound
• C)calcium compound
• D)copper compound
• E)lithium compound

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Definitions:

Afterimage

A visual phenomenon where an image continues to appear in one's vision after the exposure to the original image has ceased.

Opponent Cells

Specialized cells in the visual system that help perceive color by opposing each other.

Pitch

The perception of the frequency of a sound, determining how high or low a tone sounds.

Frequency

The rate at which a vibration occurs that constitutes a wave, either in a material (as in sound waves) or in an electromagnetic field (as in radio waves and light), usually measured in hertz.