Cycling Of Matter In Ecosystems Flashcards
What are the four main Biogeochemical cycles?
Carbon, water, nitrogen, and phosphorus
What is: the movement of matter through the biotic and abiotic environment?
Biogeochemical cycle
What are the four steps in the water cycle?
- Water evaporates into vapour
- Rises and condenses into water droplets
- Droplets collect to form clouds, fall to earth as rain, snow
- Water enters lakes, oceans, soil, or groundwater and starts cycle over
What is: water taken by plant roots released by leaves?
Transpiration
What percent of the water on earth is saltwater?
97.5%
What percent of water on earth is freshwater?
2.5%
What percent of water on earth is ice caps or glaciers?
1.97%
What percent of earths water is groundwater?
0.5%
What percent of earths water is lakes, rivers, soil?
0.03%
What percent of earths water is atmosphere?
0.001%
What are the two key processes of the water cycle?
Evaporation and condensation
What does water perolate into soil and enter permeable rock to form?
An aquifer
What are three ways that man has affected the water cycle?
- Pollution of surface and groundwater
- Increased surface runoff through deforestation and urbanization
- Draining of wetlands = loss of animal habitats and increased soil erosion
In the carbon cycle what are two removals and three additions?
Removal
- Photosynthesis
- Dissolving in the world oceans
Addition
- Combustion
- Cellular respiration
- Decomposition
What form of carbon does air contain?
CO2