1.
What are seismic waves?
Correct Answer
D. The vibration during earthquake, which travels through the ground
Explanation
Seismic waves refer to the vibrations that occur during an earthquake and travel through the ground. These waves are generated by the release of energy from the movement of tectonic plates beneath the Earth's surface. As the plates shift and collide, they create seismic waves that propagate through the Earth, causing the ground to shake. These waves can be measured and studied to understand the characteristics of earthquakes and the structure of the Earth's interior.
2.
To which direction do seismic waves travel?
Correct Answer
B. To all directions
Explanation
Seismic waves travel in all directions because they are generated by the release of energy during an earthquake. This energy spreads out in all directions from the earthquake's epicenter, causing seismic waves to radiate outward. These waves can travel through the Earth's interior, as well as along its surface, and can be detected by seismographs located around the world. Therefore, seismic waves do not travel exclusively to the east, underground, or towards the sky, but rather in all directions.
3.
At what location does the wave reaches the maximum energy?
Correct Answer
A. At the surface above quake focus
Explanation
The wave reaches the maximum energy at the surface above the quake focus because this is the point closest to the source of the earthquake. As the energy radiates outwards from the quake focus, it gradually dissipates and decreases in intensity. Therefore, the surface above the quake focus experiences the highest level of energy.
4.
What kind of waves will the quake focus release?
Correct Answer
D. P waves and S waves
Explanation
The quake focus release will produce P waves and S waves. P waves, also known as primary waves, are the fastest seismic waves and can travel through solids, liquids, and gases. S waves, also known as secondary waves, are slower than P waves and can only travel through solids. Both P waves and S waves are types of body waves that are generated by earthquakes and carry energy through the Earth's interior.
5.
What is the name of the that wave travels fastest?
Correct Answer
B. P waves
Explanation
P waves, also known as primary waves, are a type of seismic wave that travels through the Earth's interior. These waves are the fastest among all seismic waves and can travel through solids, liquids, and gases. They are capable of moving through the Earth's core and can also travel through the mantle and crust. P waves are characterized by their compressional motion, where particles move back and forth in the same direction as the wave.
6.
What does primary waves travel through?
Correct Answer
C. Solids and liquids
Explanation
Primary waves, also known as P-waves, are a type of seismic wave that can travel through both solids and liquids. This is because P-waves are compressional waves that propagate by compressing and expanding the material they travel through. Solids and liquids are both capable of transmitting these compressional waves, whereas gases lack the necessary density and elasticity to support the propagation of P-waves. Therefore, P-waves can travel through solids and liquids, but not gases.
7.
What does primary waves do to the surface of the earth?
Correct Answer
A. It compresses and expands the ground
Explanation
Primary waves, also known as P-waves, are seismic waves that travel through the Earth's interior. These waves cause the ground to compress and expand as they pass through it. This compression and expansion of the ground is what allows P-waves to travel through solid materials, including the Earth's crust. Therefore, the correct answer is that primary waves compress and expand the ground.
8.
What does secondary waves travel through?
Correct Answer
A. Solids
Explanation
Secondary waves, also known as S-waves, are a type of seismic wave that travels through the Earth's interior during an earthquake. These waves are slower than primary waves (P-waves) and can only travel through solid materials. Therefore, the correct answer is "Solids" because secondary waves cannot propagate through liquids or gases.
9.
How do secondary waves move the ground?
Correct Answer
A. Shakes the ground horizontally
Explanation
Secondary waves, also known as S-waves, move the ground by shaking it horizontally. These waves are shear waves that travel through the Earth's interior and cause the particles in the ground to move perpendicular to the direction of wave propagation. Unlike primary waves (P-waves) that cause particles to move in the same direction as the wave, secondary waves cause a side-to-side motion, resulting in horizontal shaking of the ground.
10.
Of the above, how much was answered based on prior knowledge?
Correct Answer
A. 1-2 questions
Explanation
The correct answer is "1-2 questions." This suggests that only a small portion of the questions were answered based on prior knowledge. It implies that the majority of the questions required some form of research or guessing.
11.
How does the two waves produce severe effects on the ground?
Correct Answer
A. By transforming into a much slower wave
Explanation
When two waves combine, they can undergo a process called wave transformation. In this case, the two waves transform into a much slower wave, which leads to the production of severe effects on the ground. The slower wave may have a larger amplitude or wavelength, resulting in increased destructive power. This transformation can cause significant damage and impact due to the altered characteristics of the wave.