Air in soil is essential to provide oxygen to plant roots.

True
False

true

Explanation:

Particularly, soil air is needed by many of the microorganisms that release plant nutrients to the soil. ... Since plant roots require water and oxygen (from the air in pore spaces), maintaining the balance between root and aeration and soil water availability is a critical aspect of managing crop plants.

blue stars have the highest surface temp

stellar distances are usually expressed in light-years

the measure of a star's brightness is called magnitude

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