Sound And Light 8th Grade Study

Explanation
Translucent matter refers to materials that allow light to pass through them, but they scatter the light in different directions, preventing a clear image from being transmitted. This means that while light can penetrate the material, it is not able to form a distinct image on the other side. Therefore, translucent is the correct answer as it describes a substance that transmits light but does not transmit an image.

Explanation
Transparent refers to a matter that allows light to pass through with little interference. It means that the matter is clear and allows objects to be seen clearly on the other side.

Explanation
When two or more waves combine to make one wave with more height, it is known as constructive interference. In this type of interference, the peaks of the waves align with each other, resulting in an increase in the amplitude of the combined wave. This leads to a constructive reinforcement of the waves, resulting in a higher overall wave height.

Explanation
Frequency is a measure of how many cycles or vibrations occur in a given time period. It is commonly used to describe the pitch of a sound wave or the rate of oscillation in an electromagnetic wave. The unit of measurement for frequency is hertz, which represents one cycle per second. Therefore, hertz is the correct answer for measuring frequency.

Explanation
The amplitude of a sound wave refers to the maximum displacement of particles in the medium through which the sound wave is traveling. It determines the loudness of the sound. A higher amplitude corresponds to a louder sound, while a lower amplitude corresponds to a softer sound. Therefore, the correct answer is loudness.

Explanation
Sound travels fastest through solids because the particles in solids are closely packed together, allowing sound waves to transmit more efficiently. In gases, the particles are more spread out, causing sound waves to travel slower. Liquids have particles that are closer together than gases but not as closely packed as solids, resulting in a slower speed of sound compared to solids. Therefore, the correct answer is solid.

Explanation
Sound waves are longitudinal. This means that the particles of the medium through which the sound wave is traveling vibrate in the same direction as the wave is propagating. In other words, the particles move back and forth parallel to the direction of the wave. This is in contrast to transverse waves, where the particles move perpendicular to the direction of the wave. Longitudinal waves are responsible for the transmission of sound energy from a source to our ears.

Explanation
Sound travels slowest through gas because the particles in a gas are far apart and have less interaction with each other compared to particles in a liquid or solid. This leads to a slower transmission of sound waves through the medium. In liquids and solids, the particles are closer together and can transmit sound more efficiently, resulting in faster sound propagation.

Explanation
An oscilloscope shows a sound wave as transverse because sound waves are longitudinal waves, meaning they vibrate in the same direction as the wave is traveling. However, an oscilloscope displays waves on a 2D screen, where the y-axis represents amplitude and the x-axis represents time. Therefore, the oscilloscope represents the sound wave as a transverse wave on the screen, even though the actual sound wave is longitudinal.

Explanation
The correct answer is "interference". Interference refers to the interaction between two sound waves when they combine or overlap with each other. This interaction can result in constructive interference, where the waves amplify each other, or destructive interference, where the waves cancel each other out.