The Atmosphere Contains a Relatively Low Concentration of Carbon, Mostly

question 127

Multiple Choice

The atmosphere contains a relatively low concentration of carbon, mostly in the form of CO₂.Why is this small amount considered important in the carbon cycle?

• A) Although small, it is the largest pool of carbon on Earth.
• B) It is the only source of carbon capable of moving from one pool to another.
• C) It remains in the atmosphere for long periods of time.
• D) Its concentration in the atmosphere is currently decreasing.
• E) It is the source of carbon for living organisms that carry out photosynthesis.

---

Definitions:

Form And Subform

In database applications, a form containing one or more child forms (subforms) used to represent hierarchical data relationships.

Link Child Fields

Fields in a child table or form that link to the primary key fields in the parent table, establishing a relationship.

Link Master Fields

In database forms or reports, it refers to setting relationships between two tables' key fields to synchronize their data display.

XML File Format

XML File Format is a markup language format used to encode documents in a format that is both human-readable and machine-readable, often used for data representation and transfer.