Class 8 Science Chapter 15: Natural Phenomena Quiz

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What causes the separation of charges between clouds and between clouds and the Earth during thunderstorms?

Presence of sunlight

Lightning

Movement of air currents (correct)

Movement of water droplets

Which device is used to detect the presence of charge?

Conductor

Thundercloud

Lightning rod

Electroscope (correct)

What is the process of flow of charge from cloud to cloud or from cloud to earth called?

Charge transfer

Electric discharge (correct)

Ionization

Conduction

How do lightning conductors help to protect buildings during lightning?

Attract lightning strikes away from the building Signup and view all the answers

What should be avoided during a thunderstorm to stay safe inside the house?

Contact with telephone and electrical wires Signup and view all the answers

What is the term used for any naturally occurring calamity or physical process?

Natural Phenomena Signup and view all the answers

How can a body be charged according to the text?

By rubbing due to friction Signup and view all the answers

What happens when objects with like charges interact according to the text?

They repel each other Signup and view all the answers

Why are objects attracted or repelled after gaining or losing electrons?

Due to the type of charge they carry Signup and view all the answers

What is the convention used to describe the charge acquired by a glass rod when rubbed with silk?

Positive and Negative Charges Convention Signup and view all the answers

Explain how a body can be charged by rubbing according to the text.

A body can be charged by rubbing due to friction. The electrical charges produced by rubbing are called static charges. Signup and view all the answers

Define charged objects based on the text.

Charged objects are objects that carry a charge by means of rubbing or other processes. Signup and view all the answers

Discuss the interaction between like and unlike charges as described in the text.

Like charges repel, while unlike charges attract. Signup and view all the answers

Explain the convention of positive and negative charges according to the text.

It is a convention to call the charge acquired by a glass rod when rubbed with silk positive. Signup and view all the answers

Describe how charges can be transferred based on the text.

Charges can be transferred through good conductors (metals) to another conducting material. Signup and view all the answers

Explain the process of charge transfer during lightning.

The separation of charges between clouds and the Earth leads to the flow of charge from cloud to cloud or from cloud to earth, resulting in lightning. Signup and view all the answers

How do lightning conductors protect buildings during lightning?

Lightning conductors provide a direct passage for electric discharge to the earth, preventing damage to the building. Signup and view all the answers

What safety steps should be followed outside the house during a thunderstorm?

Find a safe place, stay away from metal poles, avoid lying on the ground, and crouch with head between hands. Signup and view all the answers

Explain the role of an electroscope in detecting charge presence.

An electroscope is a device that can detect the presence of charge. Signup and view all the answers

What happens to objects when they lose their charge by transfer?

Objects become discharged when they lose their charge by transfer. Signup and view all the answers