Ecosystem####Interaction of a community of living and non-living parts of their environment
Interdependence####Species’ reliance on each other
Abiotic factors####Non-living factors that affect a community
3 examples of abiotic factors####Light, temperature, soil pH
Biotic factors####Living factors that
3 examples of biotic factors####Availability of food, predators, pathogens
Adaptation####Features that enable a species to survive
Producer####Starts off the food chain
Quadrat####Square frame used to estimate a population
Transect####A straight line in which samples are taken at regular intervals
Carbon cycle####The movement of carbon atoms in and out of the atmosphere
Water cycle####Movement of water molecules between atmosphere, oceans and land
Water cycle aka####Hydrologic cycle
Biodiversity####Variety of organisms within an ecosystem
Decomposers####Organisms that break down dead plant and animal matter
How do decomposers break down matter?####Secrete enzymes
Pyramid of biomass####A representation of the amount of biomass at each tropic level
Food security####Having enough food to feed a population
Decay####breakdown of dead matter
What 4 factors affect the rate decay?####oxygen, temperature, water, number of decay organisms
What is the Required Practical for decay?####investigation of how temperature affects decay -
measuring decrease of pH of milk when lipase is broken down
How is the change of pH measured in the RP on decay?####indicator dye - phenolphthalein
What is the independent variable for RP on decay?####temperature of test tube
What is the dependent variable for the RP on decay?####rate of decay
trophic levels####the position of an organism in a food chain or web or pyramid of biomass
producer####an organism that produces its ow energy
how do producers produce their own energy?####photosynthesis, chemosynthesis
What is the formula for biomass efficiency?####Efficiency = Biomass transferred to the next level /
Biomass available at the previous level x100
structural adaptation####a change in an organism's structure to help it survive
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller bethblackett. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $6.51. You're not tied to anything after your purchase.