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? (1 point)
Responses
The clock will slowly become quieter and will ultimately fade from view.
The clock will slowly become quieter and will ultimately fade from view.
The clock will slowly become less visible, until you can only hear it.
The clock will slowly become less visible, until you can only hear it.
The appearance of the clock will not change, but its sound will become fainter.
The appearance of the clock will not change, but its sound will become fainter.
The appearance of the clock and the sound of the clock will not change.
The appearance of the clock will not change, but its sound will become fainter.
Where do sound waves travel faster?(1 point)
Responses
through less dense materials, because the molecules in a loosely packed medium collide more frequently
through less dense materials, because the molecules in a loosely packed medium collide more frequently
through denser materials, because the molecules in a tightly packed medium collide less frequently
through denser materials, because the molecules in a tightly packed medium collide less frequently
through less dense materials, because the molecules in a loosely packed medium collide less frequently
through less dense materials, because the molecules in a loosely packed medium collide less frequently
through denser materials, because the molecules in a tightly packed medium collide more frequently
Through less dense materials, because the molecules in a loosely packed medium collide less frequently.
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?(1 point)
Responses
Rods detect light; cones detect green, blue, and red light; and the brain combines the three colors.
Rods detect light; cones detect green, blue, and red light; and the brain combines the three colors.
Cones detect light; rods detect color; and the brain decomposes the color into green, blue, and red.
Cones detect light; rods detect color; and the brain decomposes the color into green, blue, and red.
Cones detect light; rods detect green, blue, and red light; and the brain combines the three colors.
Cones detect light; rods detect green, blue, and red light; and the brain combines the three colors.
Rods detect light; cones detect color; and the brain decomposes the color into green, blue, and red.
Cones detect light; rods detect color; and the brain decomposes the color into green, blue, and red.
The American flag flies on a black flagpole. Light from the sun hits the flag and the flagpole. How is it that you can see the blue, red, and white colors of the flag and the black of the flagpole?(1 point)
Responses
Red stripes absorb red and reflect all other light, as does the blue square with blue; white stripes and stars absorb all wavelengths; and the flagpole reflects all wavelengths.
Red stripes absorb red and reflect all other light, as does the blue square with blue; white stripes and stars absorb all wavelengths; and the flagpole reflects all wavelengths.
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.
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.
Red stripes reflect red and absorb all other light, as does the blue square with blue; white stripes and stars absorb all wavelengths; and the flagpole reflects all wavelengths.
Red stripes reflect red and absorb all other light, as does the blue square with blue; white stripes and stars absorb all wavelengths; and the flagpole reflects all wavelengths.
Red stripes absorb red and reflect all other light, as does the blue square with blue; white stripes and stars reflect all wavelengths; and the flagpole absorbs all wavelengths.