Olympiad Test: Some Natural Phenomena - Class 8 MCQ

Lightning is a naturally occurring electrostatic discharge during which two electrically charged regions in the atmosphere.

When you are rubbing the glass rod with the silk cloth, electrons are stripped away from the atoms in the glass and transferred to the silk cloth. This leaves the glass rod with more positive than negative charge, so you get a net positive charge.

Scientists use a measure called Potential intensity to help them forecast the strength of trophical cyclones, aka hurricanes or typhoons.
Potential intensity, a theoretical framework of large - scale ocean - atmosphere processes, helps scientists forecast the power of a cyclone.

Houses made up of Wood frame homes, properly resist earthquakes, ain't coming down in an earthquake up to about an 8.0. They can take a huge beating and still stand.

Death: Lightning strikes can cause cardiac arrest, which can lead to death.

Injuries: Lightning strikes can cause muscle pain, broken bones, burns, confusion, hearing loss, seizures, behavioral changes, and ocular cataracts.

Property damage: Lightning strikes can create shockwaves that can blow out windows, crack foundations, and damage brick and stonework. Lightning can also damage electrical appliances, tall trees, and crops.

• Like charges repel each other, while opposite charges attract.
• This behavior is due to the electromagnetic force, which governs the interactions between charged particles.
• For example, two positively charged objects will push away from each other, and the same goes for negatively charged objects.
• This fundamental principle is crucial in understanding electricity and magnetism.

The electric charges produced by rubbing are called static charges.
Answer: a.
- When two different materials are rubbed together, electrons can transfer from one material to the other.
- This transfer of electrons causes one material to become positively charged and the other negatively charged.
- These charges remain stationary on the surface, hence they are called static charges.

Earth's outermost layer consisting of the crust and the upper mantle. Solid snd rigid. The crust of the Earth is broken into many pieces called lithospheric plates. The plates "float "  on the soft, semi rigid Asthenosphere. 
So, the given statement is false.

In ancient times earthquakes were thought to be caused by restless gods or giant creatures slumbering beneath the earth.Therefore, option (a)  In ancient times people did not know the true causes of earthquake is the correct✔ answer.