Untitled Flashcards Set

Importance of Trees

Essential for all life on Earth.

Carbon in Respiration

Organisms take in carbon to help manufacture food (photosynthesis) or release carbon as part of respiration (breathing).

Nitrogen in Atmosphere

Earth’s atmosphere is approximately 78% Nitrogen.

Nitrogen Fixation

Nitrogen must be fixed by bacteria in the soil before it can be used by other organisms.

Source of Nitrogen for Animals

Animals get nitrogen by eating plants or other animals.

Role of Decomposition in Nitrogen Cycle

When organisms are decomposed, nitrogen is returned to the soil.

Functions of Nitrogen

Nitrogen is vital for life on Earth; it is required for proteins and nucleic acids.

Connection of Phosphorus Cycle

The phosphorus cycle is connected to other biogeochemical cycles.

Steps of the Phosphorus Cycle

1. Weathering, 2) Absorption by plants, 3) Death and decomposition, 4) Sedimentation into new rocks.

Water Cycle Components

Precipitation and evaporation are important components of the water cycle.

Percentage of Earth Water

Approximately 71% of Earth is covered in water.

Primary Storage of Earth's Water

Most of Earth’s water is stored in oceans.

The Role of Plants in the Phosphorus Cycle

Phosphorus can be absorbed from the soil or water by plants.

Non-Atmospheric Cycle Element

Phosphorus is not part of the atmosphere.

Carbon Return Methods

Carbon returns to the atmosphere through animal respiration, volcanic eruptions, and burning of fossil fuels.