Explanation

Lamp is not a form of energy; it is a device that uses electrical energy to produce light.

Sound, Light, and Heat are all valid forms of energy.

Explanation

The Earth's atmosphere is divided into five main layers: Troposphere, Stratosphere, Mesosphere, Thermosphere, and Exosphere.

Each layer has unique characteristics such as temperature, density, and composition.

Explanation

Light is a form of energy.

Light is actually energy made of small particles called photons.

Explanation

In a dry cell, the electrolyte is a paste of ammonium chloride mixed with zinc chloride.

This paste allows the flow of electric current by enabling the movement of ions within the cell.

Explanation

The distance between the optical center and the principal focus is called the focal length of the lens.

while

A negative focal length indicates that the system diverges light.

Explanation

The solar energy that reaches the Earth annually is far more than the world's total energy consumption, with estimates suggesting it is more than 10,000 times the current global energy needs.

This vast amount of energy highlights the potential of solar power as a renewable energy source.

Explanation

Owls have an exceptional hearing range, typically between 200 Hz and 12,000 Hz.

This range helps them detect high-frequency sounds, crucial for locating prey in low light conditions.

Explanation

Our Sun formed about 4.57 billion years ago from a cloud of gas and dust known as a solar nebula.

This process eventually led to the formation of the entire solar system.

Explanation

Irregular galaxies have no fixed shape or structure.

They often appear chaotic and lack the symmetry of spiral or elliptical galaxies.

Explanation

On November 3, 1957, the Soviet Union sent a dog named Laika into space aboard Sputnik 2.

Laika became the first living being to orbit the Earth, though tragically, she did not survive the mission.