Use the table to answer the question.
Wave Wavelength (meters) Frequency (hertz)
W 5 200
X 3 300
The table shows information about two waves. Based on the given information, which conclusion can be made?
A. Wave W has a greater amplitude.
B. Wave X has a greater amplitude.
C. Wave W has a faster speed.
D. Wave X has a faster speed.
D. Wave X has a faster speed.
This conclusion can be drawn based on the fact that Wave X has a shorter wavelength and a higher frequency, which means it has a higher speed compared to Wave W.
A student drops a rock in a pond and notices that her reflection in the water becomes less clear. Which statement best explains the student’s observation?
A. The surface of the water is no longer hard after the rock is dropped in the pond.
B. The water is not able to reflect waves after the rock is dropped in the pond.
C. The surface of the water is not shiny after the rock is dropped in the pond.
D. The water is not a smooth surface after the rock is dropped in the pond.
D. The water is not a smooth surface after the rock is dropped in the pond.
When a rock is dropped into the water, it creates ripples on the surface of the water. These ripples disturb the smooth surface of the water, causing the reflection to become less clear.
A room with which type of surface will most likely produce an echo?
A. dirt
B. glass
C. carpet
D. foam
B. glass
Glass is a hard, smooth surface that reflects sound waves well, leading to the production of echoes. The other surfaces mentioned (dirt, carpet, foam) are softer and absorb or scatter sound waves, thus reducing the likelihood of producing an echo.
A builder wants to make a room soundproof in a new home. The builder should use materials that _____.
A. absorb sound waves and prevent echoes
B. reflect sound waves and create echoes
C. reflect sound waves and prevent echoes
D. absorb sound waves and create echoes
A. absorb sound waves and prevent echoes
To make a room soundproof, the builder should use materials that absorb sound waves rather than reflect them. This will help prevent echoes and reduce the transmission of sound through walls, ceilings, and floors.
A student puts a piece of black paper and a piece of white paper in the same sunny spot. After 30 minutes, she observes that the black paper feels warmer than the white paper. Which best explains the student’s observation?
A. The black paper prevents waves from the sun from reaching the white paper.
B. The black paper absorbs more waves from the sun than the white paper.
C. The black paper reflects more waves from the sun than the white paper.
D. The black paper receives stronger waves from the sun than the white paper.
B. The black paper absorbs more waves from the sun than the white paper.
Black objects absorb more light and heat because they absorb a wider range of wavelengths compared to white objects, which reflect more light. In this case, the black paper is absorbing more sunlight, leading to it feeling warmer than the white paper.
During a baseball game, the sound of the bat hitting the ball can be heard in most parts of the stadium. That sound is weaker at greater distances. What is the cause of this phenomenon?
A. The sound waves can only travel through certain materials.
B. The sound waves slow down as they move away from the bat.
C. The sound waves are blocked by people in the stadium.
D. The sound waves are spread out over a large area.