Meteorite Definition Analysis

The assertion defines meteorites. Let's break down this definition:

• Assertion [a]: "Meteorites are the solid extraterrestrial material that strikes the surface of the earth."

This statement is scientifically accurate. A meteorite is indeed a solid object originating from outer space (extraterrestrial) that survives its fiery passage through Earth's atmosphere and impacts the planet's surface. Examples include fragments from asteroids, comets, or even planets like Mars.

Chondrite Composition Explanation

The reason discusses a specific type of meteorite. Let's analyze it:

• Reason [r]: "The most primitive among chondrites are those containing carbon called carbonaceous chondrites and they retain at least some of their volatile elements."

This statement is also scientifically correct. Carbonaceous chondrites are a group of stony meteorites known for:

• Being rich in carbon compounds.
• Containing significant amounts of water and other volatile elements (substances that evaporate easily).
• Being considered among the most primitive types of meteorites, offering clues about the early solar system's composition.

Evaluating Reason's Explanation of Assertion

Now, we need to determine if the reason explains the assertion.

• The assertion provides a general definition of what a meteorite is.
• The reason describes the specific characteristics of a particular subclass of meteorites (carbonaceous chondrites), such as their composition and primitive nature.

While both statements are true, the properties of carbonaceous chondrites (like retaining volatile elements) do not serve as the fundamental explanation for why meteorites, in general, are defined as solid extraterrestrial objects that strike Earth. The reason provides details about a specific type, not the core concept presented in the assertion.

Therefore, both statements are true, but the reason is not a correct explanation for the assertion.