What does a model of the carbon cycle show?(1 point)

Question

Responses

The amount of Earth’s carbon cannot be determined.
The amount of Earth’s carbon cannot be determined.

The amount of Earth’s carbon is constant.
The amount of Earth’s carbon is constant.

The amount of Earth’s carbon decreases.
The amount of Earth’s carbon decreases.

The amount of Earth’s carbon increases.
The amount of Earth’s carbon increases.

Answer 1

The most accurate response is:

The amount of Earth’s carbon is constant.

The carbon cycle is a closed system that describes how carbon atoms are recycled and reused throughout the Earth's systems, including the atmosphere, biosphere, hydrosphere, and geosphere. Overall, while carbon can change forms and move between different reservoirs, the total amount of carbon on Earth remains relatively constant over time.