The following Topics and Sub-Topics are covered in this chapter and are available on MSVgo:
Class 8 Science chapter ‘Some Natural Phenomena’ talks about earthquakes and lightning as critical phenomena of nature. It also discusses various methods to limit destruction from these natural phenomena.
Natural phenomena are any processes that occur naturally without human involvement. Some most commonly occurring natural phenomena that you must have experienced are Lightning and Earthquake.
A static charge is a form of electricity formed as a result of an imbalance between negative and positive charges.
Methods of Charging
Charging due to rubbing
Charged objects are objects that become charged due to rubbing and other charging processes. Types of charged objects:
Interaction of positive and negative charges causes two phenomena: Repulsion and Attraction.
Transfer of charges
Charges transfer from a good conductor of electricity like metals and water to another good conductor of electricity due to electrons’ movement between the two conductors. Passing electricity causes the movement of electrons, which further causes the transfer of charges.
The story of lightning starts from heavy rainfall or storms where the particles of air and water droplets in the storm cloud collide, thereby causing a separation of charges between the cloud and the ground, which creates an imbalance in nature. The ground becomes positively charged while the storm cloud, which is negatively charged, allows an electric discharge through the air as charges increase between ground and storm cloud. As a result, you experience lightning as nature transfers electric current between the two charges that are the ground (positively charged) and the storm cloud (negatively charged).
How to Protect Yourself From Lightning
You must have experienced sudden shaking of your house floor; this phenomenon is called an earthquake. Disturbances inside the crust of the earth cause an earthquake, which results in large scale damage to population and properties.
The causes of an earthquake
How to Protect Yourself From Earthquakes
What is Natural Phenomena?
Natural phenomena are any process that occurs naturally, and there is no human involvement like earthquakes and lightning.
Is earthing a natural phenomenon?
No, earthing is not a natural phenomenon. You can use this process to safeguard your building from lightning.
What are the three most destructive natural phenomena?
Volcanic eruptions, earthquakes, and tsunamis are the three most destructive natural phenomena.
Which natural phenomenon is responsible for lightning?
Electric discharge between different clouds or between cloud and ground is responsible for lightning.
What causes a natural phenomenon?
Natural imbalances like heavy rainfall and the collision of tectonic plates are the reasons for natural phenomena.
What are the physical phenomena?
All-natural phenomena that consider the physical properties of energy and matter are called physical phenomena like erosion.
Natural phenomena is a very interesting and important chapter of science. So, the visual representation of topics is very important. The MSVgo app is a video library that helps you understand topics through exploratory visualizations and practical examples. MSVgo helps you to understand the science behind formulas and phenomena through animations and videos. So, do check out the videos at MSVgo for better understanding and clarification.
Some Natural Phenomena is not only an important chapter but also a life lesson for you Do practice the measures to protect yourself from these natural phenomena if you ever face them. This chapter forms a base for upcoming science chapters like friction, tectonic plates, and Earth’s crust.