The Atmosphere Is Divided into Several Distinct Layers

question 18

Multiple Choice

The atmosphere is divided into several distinct layers.From the ground up they are,in order,

• A) stratosphere,troposphere,mesosphere,and thermosphere.
• B) troposphere,stratosphere,thermosphere,and mesosphere.
• C) troposphere,stratosphere,mesosphere,and thermosphere.
• D) stratosphere,troposphere,thermosphere,and mesosphere.

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Definitions:

Immune Function

The activities and mechanisms through which an organism's immune system identifies and eliminates pathogens and unhealthy cells.

Vitamin E

A group of eight fat-soluble compounds that are important for maintaining healthy skin and a strong immune system.

Zinc

A chemical element with the symbol Zn, essential for human health, involved in numerous aspects of cellular metabolism.

Calcium

A chemical element, symbol Ca, essential for living organisms, particularly in cell physiology and bone formation.