Sound And Wave Unit Test

Explanation
The amplitude is the height of a wave. It represents the maximum displacement of a wave from its equilibrium position. In other words, it measures the distance from the highest point of a wave to its equilibrium position. The larger the amplitude, the more energy the wave carries.

Explanation
The wavelength refers to the distance between two crests or two troughs. It is a measurement of the length of one complete wave cycle. In other words, it represents the distance traveled by a wave in one complete oscillation. Wavelength is an important concept in understanding various wave phenomena, such as light waves, sound waves, and electromagnetic waves. It is commonly represented by the Greek letter lambda (λ) and is measured in meters or other units of length.

Explanation
The outer ear is called the pinna. The pinna is the visible part of the ear that is made up of cartilage and skin. Its main function is to collect sound waves and direct them into the ear canal. The pinna also helps to localize sound and protect the ear canal from foreign objects.

Explanation
The equation for finding the period of a wave is 1/frequency. The period of a wave refers to the time it takes for one complete cycle of the wave to occur. In other words, it is the time it takes for the wave to repeat itself. The period is inversely proportional to the frequency of the wave, meaning that as the frequency increases, the period decreases, and vice versa. Therefore, the equation 1/frequency accurately represents this relationship, where the period is equal to 1 divided by the frequency.

Explanation
Bats, dolphins, and whales are all animals that use echolocation. Echolocation is a biological sonar system that allows these animals to navigate and locate objects in their environment by emitting sounds and listening to the echoes that bounce back. Bats use echolocation to navigate in the dark and locate their prey, while dolphins and whales use it to communicate, navigate, and find food in the water.

Explanation
The equation for finding the frequency of a wave is 1/period. Frequency is the number of complete cycles of a wave that occur in one second, while period is the time it takes for one complete cycle. Since frequency is the reciprocal of the period, the equation is 1/period.

Explanation
The Doppler Effect refers to the change in frequency of a wave (such as sound or light) due to the relative motion between the source of the wave and the observer. If either the source or the observer is moving towards each other, the frequency appears to increase, resulting in a higher pitch or shorter wavelength. Conversely, if either the source or the observer is moving away from each other, the frequency appears to decrease, resulting in a lower pitch or longer wavelength. This phenomenon is commonly observed in everyday life, such as the change in pitch of a siren as an ambulance approaches and then passes by.

Explanation
Blue shift refers to an increase in frequency, specifically in the context of light or other electromagnetic waves. This phenomenon occurs when an object emitting waves is moving towards an observer. As the object moves closer, the waves are compressed, resulting in a higher frequency. This shift towards the higher end of the electromagnetic spectrum is perceived as a blue shift because blue light has a higher frequency than red light. Blue shift is commonly observed in astronomy when celestial objects, such as galaxies or stars, are moving towards Earth.

Explanation
Red shift refers to the phenomenon in which the frequency of light or other electromagnetic waves appears to decrease. This occurs when an object, such as a star or galaxy, is moving away from an observer. As the object moves away, the waves get stretched, causing a decrease in frequency. This shift towards longer wavelengths is a key piece of evidence for the expansion of the universe and is commonly used in astronomy to measure the distance and velocity of celestial objects.