Class 8 Some Natural Phenomena Question and Answers

Class 8 Some Natural Phenomena Question and Answers

 

Fill in the blanks

………. is a device used to determine if an object is charged or not

…………. is provided in buildings to prevent electric shocks.

…………. measure the intensity of an earthquake.

………… have a positive charge

………… is an atmospheric discharge of electricity that is usually accompanied by thunder

Earth’s fragments are called ………… plates

Earthquakes are typically caused by the sliding of …………. plates.

…………… is the process of transferring charge from a charged object to the earth.

Richter scales measure the magnitude of ……………….

 

Fill in the blanks answers

Electroscope

Earthing

Seismographs

Protons

Lightning

Tectonic

Tectonic

Earthing

Earthquakes

 

Short Question Answers

Define Earthing:

The process of transferring a charge from an object to the earth is known as earthing.

 

Define Seismology:

Seismology is the scientific branch of study that deals with earthquakes and related phenomena.

 

Define Epicenter:

Epicenter refers to the location on Earth’s surface directly above the focus (the source of an earthquake)

 

Define Fault zones:

The areas where one tectonic plate slides against another are known as fault zones.

 

Define Earthquake:

An earthquake is described as a sudden shaking or trembling of the earth’s crust and mantle.

 

Define Seismogram:

Seismograms are graphical outputs from seismographs showing the seismic activity of Earth’s plates.

 

Define Seismic waves:

A seismic wave is a wave produced by an earthquake that travels through the earth or on the surface.

 

Define Tectonic plates;

The rock plates that make up the surface of the earth.

 

Define Seismograph:

An instrument used in the measurement of seismic waves is called a seismograph.

 

What is the Richter scale?

Richter scales are used to measure the magnitude and intensity of earthquakes.

 

What are the two main types of charges?

The two main types of charges are proton[positive charge] and electrons [negative charge]

 

What are the different ways to charge an object?

Charging is the process of supplying electric charge (electrons) to or removing electric charge (electrons) from an object. There are several ways to charge an object.

  • Charging by friction
  • Charging by conduction
  • Charging by induction
  • Charging by friction

 

During an earthquake, how can you protect yourself?

Immediately move to an open place where falling things are unlikely to hit you. Stay away from collapsing structures such as buildings, electric poles, trees, sign boards, bridges, and other structures.

 

 

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