Explanation

Irregular galaxies have no fixed shape or structure.

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

Explanation

Explanation

Explanation

The stratosphere is a layer of Earth's atmosphere.

Stratosphere is the second layer of the atmosphere as you go upward.

Explanation

Heat of vaporization is the amount of heat energy required to convert a substance from its liquid state to its gaseous state, without changing its temperature.

This energy is used to break the intermolecular forces between the molecules, allowing them to escape into the gas phase.

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Explanation

The El Niño-Southern Oscillation (ENSO) cycle primarily occurs in the East-central Equatorial Pacific Ocean.

It involves periodic changes in sea surface temperatures and atmospheric pressures, influencing global weather patterns.

Explanation

Escape velocity is the minimum speed a spacecraft needs to completely overcome Earth's gravitational pull without further propulsion.

For Earth, this velocity is approximately 11.2 km/s.

Explanation

The strength or intensity of a force is measured by its magnitude, which represents its size.

Force is a vector quantity, meaning it has both magnitude and direction.

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).