Question

based on what you just watched, why is the kelvin scale necessary? because it is based on absolute zero, the lowest possible temperature matter can have because its values are always integers because it can measure lower temperatures than the celsius scale

Explanation:

To determine why the Kelvin scale is necessary, we analyze each option:

• The first option: The Kelvin scale is an absolute temperature scale based on absolute zero (0 K), which is the lowest possible temperature where molecular motion theoretically stops. This is a fundamental reason for its necessity in scientific contexts (like thermodynamics) to have a scale rooted in a true zero - point of temperature.
• The second option: Kelvin scale values are not always integers (e.g., 298.15 K is a common value for room temperature in Kelvin), so this is incorrect.
• The third option: The Kelvin scale and Celsius scale measure the same temperature range in terms of "how low" they can go in terms of physical possibility (since absolute zero is the limit, and the Celsius scale can measure negative temperatures, but those are still above absolute zero). The key is the absolute zero - based definition, not measuring "lower" in a way that the Celsius scale can't conceptually reach (as both scales relate to the same physical temperature range, with Kelvin starting at absolute zero).

Answer:

A. Because it is based on absolute zero, the lowest possible temperature matter can have