Science M.C.Q. [I MARKS]

The tremors produce waves on the surface of the earth. These are called seismic waves. These waves are recorded by the seismograph.

The combing of hair make the comb negatively charged. It is able to attract tiny pieces of paper which are neutral.

Like charges repel and unlike charges attract each other.

 Earthquake is a sudden shaking or trembling of the earth due to the collision between the earth’s plates or brushing past of one plate over the other. It can cause Tsunami, floods and landslides.

Earthquake is a sudden shaking or trembling of the earth due to the collision between the earth’s plate or brushing past of one plate over the other. It can cause tsunami, floods and landslides.

Earth's crust is fragmented into pieces which are called plates. These plates are also known as tectonic plates.

Since earthquakes are caused by the movement of plates, the boundaries of the plates are weak zones where earthquake are more likely to occur. These weak zones are also known as seismic zones or fault zones.

 Neutrons bear no charge upon them and they are neutral.

An electroscope is a device, which is used to test whether an object is charged or not. It consists of closely place two metallic strips. When both the strips are charged with similar charges, they repel each other and become wide open.

The accumulated negative and positive electric charges combine to produce streaks of bright light/ lightning.

Lithosphere is the thinnest layer and made up of molten rocks. The crust is the layer of hard rock that float on the molten mantle.

 The boundaries of the plates are the weak zones where earthquakes are more likely to occur. These are also known as seismic zones and fault zones.

An electroscope is a device, which is used to test whether an object is charged or not. It consists of closely placed two metallic strips. When both the strips are charged with similar charges, they repel each other and become wide open.

Tsunami refers to the powerful sea waves generated due to the disturbance under the sea. It is not likely to occur in case of lightning, because lightning is an electric spark caused by the accumulation of charges in clouds.

The outer layer of the earth, on which we live is called the crust. The thickest part of the earth's crust is the continent.

When a glass rod is rubbed with silk cloth, it loses electrons and acquires positive charge.

In India, Kashmir, Western and Central Himalayas are some places that fall along or near the fault zone. So, earthquakes are most likely to occur in those places.

On the earth, the outer most layer "lithosphere" includes the crust and the mantle. It is fragmented into tectonic plates, which move independently relative to one another. This movement of lithospheric plates is described as plate tectonics.

Here, all the statements are correct.

The seismic or fault zones are most prone to earthquakes.

The process of electric discharge between clouds and the earth or between different clouds causes lightning. The tremendous electric charges in the atmosphere which produce sheet lightning in the clouds are produced by the process of “friction”.

The best way to protect oneself from a possible thunder-strike is to remain in the car with the doors and windows closed.
The car touches the earth through the rubber tyres which are insulators.
So, the thunder is not attracted by the car as it does not liberate any charge in the air due to insulated connection to the earth.
For all other cases, there are chances of thunder-strike.

Earth consist of core, mantle and crust. Core is the centre of the Earth. Core, again, consists of inner core and outer core. Inner core is inner most part, or, the centre of the Earth.

Japan is most prone to earthquakes. People of Japan construct their buildings in such a way that these can withstand major tremors.

An earthquake is a sudden shaking or trembling of earth. It is so sudden that it cannot be predicted in advance.

After rubbing the glass rod with silk cloth, the glass rod becomes positively charged. The silk cloth becomes negatively charged. When a plastic comb is dry hair, it becomes negatively charged. The negatively charged comb induces a positive charge on the pieces of paper which are neutral in nature.

Electric charge is measured in 'coulombs’.