Chapter 13.5 & 13.6

Hydrologic Cycle

• circular pathway of water on Earth
• movement of a particular chemical through the living and nonliving parts of an ecosystem
• most organisms use oxygen for cellular respiration
• carbon dioxide is converted from air into carbohydrates

Biogeochemical cycles include

• oxygen, chemical, carbon, nitrogen
• oxygen, carbon, nitrogen, phosphorus
• chemical, carbon, nitrogen, geometry

Two ways that water can enter the atmosphere

• circular pathway of water on Earth
• movement of a particular chemical through the living and nonliving parts of an ecosystem
• evaporation and transpiration
• carbon dioxide is converted from air into carbohydrates

Vapor

• gaseous state of a substance
• circular pathway of water
• carbon dioxide

Oxygen Cycle

• circular pathway of water on Earth
• movement of a particular chemical through the living and nonliving parts of an ecosystem
• most organisms use oxygen for cellular respiration through photosynthesis
• carbon dioxide is converted from air into carbohydrates

Carbon Cycle

• circular pathway of water on Earth
• movement of a particular chemical through the living and nonliving parts of an ecosystem
• most organisms use oxygen for cellular respiration through photosynthesis
• carbon dioxide is converted from air into carbohydrates

Nitrogen Cycle

• circular pathway of water on Earth
• bacteria turns nitrogen gas into ammonia
• most organisms use oxygen for cellular respiration through photosynthesis
• carbon dioxide is converted from air into carbohydrates

Phosphorus Cycle

• takes place at ground level
• bacteria turns nitrogen gas into ammonia
• most organisms use oxygen for cellular respiration through photosynthesis
• carbon dioxide is converted from air into carbohydrates

Essential means unnecessary, not required

• True
• False

Two main biological processes responsible for the cycling of oxygen

• photosynthesis and respiration
• evaporation and photosynthesis
• respiration and evaporation