Explanation

A meteorite is a small solid rock that survives its passage through the Earth's atmosphere and lands on the surface.

It differs from a meteoroid (before entering the atmosphere) and a meteor (which burns up in the atmosphere).

Explanation

Frequency is the number of cycles per unit time in a periodic wave.

It is measured in Hertz (Hz), where 1 Hz equals one cycle per second.

Explanation

The Earth's layers include the crust, mantle, outer core, and inner core.

Magma is molten rock found within the mantle and crust, but it is not a distinct layer.

Explanation

An opaque object does not allow light to pass through.

A wooden box blocks light completely, making it opaque.

Explanation

Explanation

 Those substances through which electric current cannot pass are called insulators.

Insulators have very high electrical resistance

. For example, wood, rubber, glass, paper, plastic and wax are insulators of electricity.

Insulators cannot conduct electricity due to absence of free electrons in them.

Explanation

Glass is an insulator because it does not allow electricity to pass through easily.

Silver, copper, and aluminum are conductors, meaning they allow electric current to flow.

Explanation

Explanation

Explanation

 A convex lens is thicker at the centre than at the edges. 

A camera uses a convex lens to focus light rays and form an image on a piece of film or a digital sensor at the back, capturing the scene in front of it.