1.
What are seismic waves?
Correct Answer
B. They are energies violating the earth's layers.
Explanation
Seismic waves are energy waves that travel through the Earth's layers. These waves are generated by earthquakes, volcanic activity, or other sources of energy release within the Earth. As they propagate through the Earth, seismic waves can cause vibrations and disturbances in the ground. These waves can be measured and studied to understand the structure and composition of the Earth's interior.
2.
Which is not caused by seismic wave?
Correct Answer
C. Floor drop
Explanation
Floor drop is not caused by seismic waves. Seismic waves are vibrations that travel through the Earth's crust during an earthquake or volcanic activity. These waves can cause various effects such as shaking of the ground, landslides, and volcanic eruptions. However, floor drop refers to the sinking or collapse of a building or structure, which is typically caused by structural failure or other factors unrelated to seismic waves.
3.
Who are those who study seismic waves?
Correct Answer
B. Seismologist
Explanation
Seismologists are the ones who study seismic waves. They are scientists who specialize in studying earthquakes and the vibrations that occur in the Earth's crust as a result of these seismic waves. They analyze the characteristics and behavior of these waves to better understand the Earth's structure and the processes that lead to earthquakes. Through their research, seismologists play a crucial role in monitoring and predicting earthquakes, as well as in assessing the potential impacts of seismic activity on society and infrastructure.
4.
What records wave fields?
Correct Answer
C. Seismometer
Explanation
A seismometer is a device that is used to measure and record the motion of the ground during an earthquake. It consists of a mass attached to a fixed base, and when the ground shakes, the mass remains relatively still due to inertia. The base, however, moves with the ground, and this relative motion is recorded by sensors in the seismometer. The recorded data can be used to analyze and study the characteristics of seismic waves, providing valuable information about the earthquake's magnitude, location, and other properties.
5.
Which is caused by seismic waves?
Correct Answer
C. Earthquake
Explanation
Seismic waves are vibrations that travel through the Earth's crust and are typically associated with earthquakes. These waves are generated by the release of energy from the movement of tectonic plates. Therefore, earthquakes are caused by seismic waves, making them the correct answer in this case. Lightning and acidic rain, on the other hand, are not caused by seismic waves but have different causes.
6.
What are known as P-waves?
Correct Answer
A. Primary waves
Explanation
Primary waves, also known as P-waves, are a type of seismic wave that are the first to be recorded on a seismograph during an earthquake. These waves are characterized by their ability to travel through solids, liquids, and gases, and they cause particles to move in a back-and-forth motion parallel to the direction of wave propagation. P-waves are the fastest seismic waves and can travel through the Earth's interior, providing valuable information about the structure and composition of the planet's layers.
7.
Which is a feature of S-waves?
Correct Answer
C. Transverse
Explanation
S-waves, also known as shear waves, are a type of seismic waves that travel through the Earth's interior during an earthquake. One of the main characteristics of S-waves is that they have a transverse motion, meaning that they move perpendicular to the direction of wave propagation. This transverse motion allows S-waves to shake the ground from side to side or up and down, but not in the same direction as the wave itself. Therefore, the correct answer is "Transverse."
8.
What is an S-wave?
Correct Answer
A. Secondary
Explanation
An S-wave refers to a type of seismic wave that travels through the Earth's interior during an earthquake. It is called a secondary wave because it is the second fastest type of wave to arrive at a seismograph station, following the primary wave (P-wave). S-waves are responsible for the side-to-side shaking motion felt during an earthquake and can only travel through solid materials.
9.
What's another name for Rayleigh waves?
Correct Answer
C. Ground rolls
Explanation
Rayleigh waves, also known as ground rolls, are a type of surface wave that travel along the ground. They are named after Lord Rayleigh, who first mathematically described their behavior. These waves cause the ground to move in an elliptical motion, with particles moving both vertically and horizontally. Ground rolls are commonly observed during earthquakes and can cause significant damage to structures.
10.
Where do the seismic waves come from?
Correct Answer
B. The ground
Explanation
Seismic waves originate from the ground. When there is an earthquake or any other seismic activity, the energy is released from the Earth's crust, causing vibrations that travel through the ground in the form of seismic waves. These waves can be detected and measured by seismographs, helping scientists study and understand earthquakes and the Earth's interior.