In the sentence argon has several properties distinct from other gases", what does distinct mean?
a)making a clear imression
b)notable
c)separate
d)easily seen
who ever answers i will give brainiest and 100 points!

Distinct means separate.  

Option: C  

Explanation:

From the given sentence Argon has several properties that are separate from other gases. This sentence refers that Argon gas has many properties that are different from other gases.

The things are distinct from one another, they are different. Although, the solubility of oxygen is same as Argon. Argon is soluble in water in the form of nitrogen. This gas is isolated through the liquid air fractionation only 0.94% argon is present in the atmosphere.

answer: the exterior temperature of commercial jet planes as they leave the stratosphere and return to the ground increases steadily.

explanation:

the lower most layer of atmosphere is troposphere which extends from 0 to 12 km above the surface of the earth. the temperature initially decreases as distance is increased from the earth's surface. commercial jets fly in lower part of the stratosphere. the stratosphere extends upto 50 km. the temperature in stratosphere starts rising again due to presence of ozone which traps the uv rays.

thus, when the planes leave the stratosphere and return to the ground, the exterior temperature increases steadily.

magnified images possible images can be real = projected onto a screen