1. A ringing alarm clock is put under a glass jar. The air is slowly removed from the space around it. What will happen as the air is removed?
A. The appearance of the clock will not change, but its sound will become fainter.
B. The appearance of the clock and the sound of the clock will not change.
C. The clock will slowly become less visible, until you can only hear it.
D. The clock will slowly become quieter and will ultimately fade from view
2. How are mechanical waves defined?(1 point)
Responses
A. They are waves that require some form of matter as a medium.
B. They are waves that involve matter, rather than energy, moving from one place to another.
C. They are waves that are able to pass through a vacuum.
D. They are waves that are generated by humans, rather than naturally.
3. Where do sound waves travel faster?
A. through denser materials, because the molecules in a tightly packed medium collide less frequently
B. through less dense materials, because the molecules in a loosely packed medium collide less frequently
C. through less dense materials, because the molecules in a loosely packed medium collide more frequently
D. through denser materials, because the molecules in a tightly packed medium collide more frequently
4. The retina of the eye has rods and cones which play a crucial function in sight. Which statement explains how rods and cones work to help us see things?
A. Rods detect light; cones detect green, blue, and red light; and the brain combines the three colors.
B. Cones detect light; rods detect color; and the brain decomposes the color into green, blue, and red.
C. Cones detect light; rods detect green, blue, and red light; and the brain combines the three colors.
D. Rods detect light; cones detect color; and the brain decomposes the color into green, blue, and red.
1. The appearance of the clock will not change, but its sound will become fainter.
2. They are waves that require some form of matter as a medium.
3. Through denser materials, because the molecules in a tightly packed medium collide more frequently.
4. Rods detect light; cones detect green, blue, and red light; and the brain combines the three colors.
5 Red stripes reflect red and absorb all other light, as does the blue square with blue; white stripes and stars reflect all wavelengths; and the flagpole absorbs all wavelengths.
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1. D. The clock will slowly become quieter and will ultimately fade from view as the air is removed.
2. A. They are waves that require some form of matter as a medium.
3. A. Through denser materials, because the molecules in a tightly packed medium collide less frequently.
4. B. Cones detect light; rods detect color; and the brain decomposes the color into green, blue, and red.