title FIVE QUESTIONS:

QUESTION 1: Which of these units of measurement is the smallest?
microgram
milligram
troy ounce
grain

QUESTION 2: Your camera has a 50 millimeter lens. The 50 millimeter measurement describes what aspect of the lens ?
diameter
magnification
focal length
aperture

QUESTION 3: Which of the following does NOT travel in a vacuum?
radio waves
sound waves
gamma waves/particles
magnetic waves

QUESTION 4: In which of these mediums does sound travel fastest?
iron
air
water
vacuum

QUESTION 5: Which color light has the highest frequency?
green
violet
red
yellow

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