Some Natural Phenomena Science - Some Natural Phenomena

Consider the list of terms given below
(i) Tsunami
(ii) Landslide
(iii) Floods
(iv) Lightning
Earthquakes can cause

Major earthquakes are less likely to occur in

An electroscope is a device which is used to find, if an object is

Two charged objects are brought close to each other. Choose the most appropriate statement from the following options.

Which of the following is not likely to cause tsunami?

Earthquake is caused due to the movement of _________ plates in the earth crust.

__________ is a device used to protect buildings from the effect of lightning.

Static charges can be induced by _________.

Earthquake is caused by a __________ deep inside the earth's crust.

Lightning conductor can_________ buildings from the effect of lightning.

Explain why it is safer to use a wireless telephone Instead of a landline telephone during lightning?

If the metal clip used in the electroscope is replaced by an ebonite rod and a charged body is brought in contact with it, will there be any effect on the aluminium strips? Explain.

If air and cloud are good conductors of electricity, do you think lightning could occur? Explain.

Identify the lightning conductor and the copper plate In figure.

In an electroscope, if a negatively charged body is brought in contact with the metal clip, the strips of the electroscope diverge. If now another charged object carrying equal amount of positive charge is brought in contact with the clip, what will happen?

Tremors on the earth can also be caused by the eruption of a volcano.

The process of electric discharge cannot occur between clouds and the earth.

The plates of the outermost layer of the earth are always in continuous motion.

Seismograph is used to detect the presence of electric charge in a body.

We should not take bath during thunderstorm.

Priya went to the school with umbrella on rainy season. One day, while returning from the school the rain started on the way. Priya opened her umbrella and saved herself from rainwater. After sometime, she observed some lightning sparks in the sky. Suddenly, she folded her umbrella and went to a shelter under a closed building.
(i) State the cause of lightning.
(ii) Priya folded her umbrella. Explain why?
(iii) Mention the method opted by Priya here.

We should use mobile phones rather than landline phones during thunderstorm. Give reasons.

Name the three layers of earth. Draw a labelled diagram to show the structure of the earth.

During lightning, If you are outside the house, then what precautions would you take?

Describe with the help of a diagram, an instrument which can be used to detect a charged body.

In year 2013, there was a showcase in IIT Hyderabad. All the students from different schools and colleges were invited on that occasion. Naveen with his friends went to see the projects made by M.Tech students. He found a project based on the construction of anti-earthquake buildings in which the small houses of iron rods were constructed. One house was with a hose containing water and the other was without hose. They were shocked on shaking of both the houses.
(i) Describe an earthquake.
(ii) Explain the meaning of quake-resist building.
(iii) Mention which force reduces the shaking in a building with hose.
(iv) State the feeling about the students who showed their project.

Plastic straws A and B are rubbed with dry cotton cloth. What will happen, if they are brought near each other?

If a charged plastic straw is brought near another uncharged plastic straw, what will happen?

If scientists know so much about earthquakes, can they also predict when and where next one will strike?

What could cause a disturbance inside the earth?

What is an earthquake?