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Science 2.4


Ecosystem This term refers to all the interacting communities within a given area plus the abiotic factors affecting it
What are abiotic factors? non-living things
What are biotic factors? living organisms
What are autotrophs (producers)? self feeder or eater
What do producers do? These organisms take the sunlight and inorganic matter and convert it into organic energy storing molecules (food/ sugars)
What is the start of all food chains? producers
What are heterotrophs (consumers)? mostly eater but can be prey for other animals so, can also be eater
What are the different levels of consumers? primary, secondary, tertiary, etc.
How do consumers get energy and store matter? eat other organisms
What are Decomposers or detritovores? feed on dead, organic matter-detrius
What do decomposers do? take detrius and convert it back to the inorganic state for recycling and use by producers
What are Biogeochemical cycles? This refers to the constant cycling of matter on Earth
What scientific law is this supported by? Law of Conservation of Matter
What does the Law of Conservation of Matter state? The law states “matter is neither created or destroyed; just transfered and transformed.”
Why does water evaporate? Water evaporates because of sunlight from bodies of water and is carried in clouds by wind to almost while world. The water vapor condenses to rain of snow (precipitation) and returns to the surface of the Earth
What do plant take in water for? Photosynthesis
How does the carbon cycle work? Carbon dioxide is removed from the air by photosynthesis (performed by plants, phytoplankton, and bacteria)
How does carbon dioxide return to the atmosphere? by the burning of organic material
Through what does nitrogen move through? Nitrogen moves between plants, animals, bacteria, the atmosphere, and soil
About how much nitrogen is in the atmosphere? approximately 78%
About how much nitrogen is in the human body weight? approximately 3%
Created by: S732581nc