The computer science elective courses were moved to Group 4 as a full course from first examinations in Courses offered at both SL and HL: Environmental systems and societies SL is an interdisciplinary course designed to meet the diploma requirements for groups 3 and 4, while Literature and Performance SL meets the requirements of Groups 1 and 6. The externally assessed examinations are given worldwide in May usually for Northern Hemisphere schools and in November usually for Southern Hemisphere schools.
Autotrophs are organisms that synthesize their organic molecules from simple inorganic substances whereas heterotrophs are organisms that obtain organic molecules from other organisms. A food chain shows the direction of energy flow from one species to another. For example, an arrow from A to B means that A is being eaten by B and therefore indicates the direction of the energy flow.
A food web is a diagram that shows all the feeding relationships in a community with arrows which show the direction of the energy flow. Producers, primary consumers, secondary consumers and tertiary consumers are examples of trophic levels. Plants or any other photosynthetic organisms are the producers.
Primary consumers are the species that eat the producers. Secondary consumers are the species that eat the primary consumers and tertiary consumers in turn eat the secondary consumers.
Light is the initial energy source for almost all communities. Producers receive their energy from light energy the sun by means of photosynthesis. After this, the energy in organic matter flows from producers to primary consumers to secondary consumers to tertiary consumers.
This is because producers will be eaten by primary consumers which in turn will be eaten by secondary consumers and so on. However, between these trophic levels, energy is always lost.
All of the trophic levels lose energy as heat through cell respiration. Also, as the organic matter passes from one trophic level to the next, not all of it is digested and so we have loss of energy in organic matter through feces.
IB Geography Revision Notes Topic 2- Disparities in Wealth and Development Written by Benjamin Tavener Editor of Geography Base™ population. Birth rates: The number of births per of population per year. Death rates. IB Geography Population notes. Topics: Demography Geography Test Notes: Population Trends, Fertility, Migration and Gender inequality Analyze trends and patterns in population using relevant case studies and indicators World Population Growth Worlds population growing very rapidly. The International Baccalaureate® (IB) offers four high quality international education programmes to more than one million students in more than countries.
This energy then passes on to the detritivores and saprotrophs. Another energy loss occurs through tissue loss and death which can happen at any trophic level. Once again, this energy would be passed on to detritivores and saprotrophs as they digest these.
Detritivores and saprotrophs in turn lose energy as heat through cell respiration. Energy flows from producers to primary consumers, to secondary consumers, to tertiary consumers Energy is lost between trophic levels in the form of heat through cell respiration, faeces, tissue loss and death.
Some of this lost energy is used by detritivores and saprotrophs. These in turn also lose energy in the form of heat through cell respiration. Energy is not recycled.
It is constantly being supplied to ecosystems through light energy and then flows through the trophic levels.
As it flows through the trophic levels energy is lost in feces, tissue loss and death. This energy from these losses is passed on to detritivores and saprotrophs. However the energy is then lost from the ecosystem as the remaining energy in the trophic levels and the energy in the saprotrophs and detritivores is lost through cell respiration in the form of heat.
As a result, energy needs to be constantly supplied to the ecosystems.
Nutrients on the other hand are different as they constantly have to be recycled. Carbon, nitrogen and phosphorus are all examples of nutrients. There is only a limited supply of these as they are not resupplied to the ecosystems like energy.
Therefor they have to be recycled over and over. They are absorbed from the environment, used by living organisms and then returned to the environment.
Constantly being supplied to the ecosystem through light energy. Energy is lost from the ecosystem in the form of heat through cell respiration. Nutrients must be recycled as there is only a limited supply of them.
They are absorbed by the environment, used by organisms and then returned to the environment. Saprotrophic bacteria and fungi decomposers recycle nutrients.IB SL Geography Revision Notes.
Populations in Transition: Population trends: Global population change o In most regions population growth has increased between and , and then again between and (Africa, South America, Australia, Asia) with the exception of North America and Europe o In contrast, the projected changes for show that the population 5/5(6).
IB Geography. Home Core Options HL Extension Geography students must be able -at a minimum- to place all the names (countries, oceans, mountain ranges, etc) listed on the document attached Tendency for a population to continue growing even after .
The Best IB Geography Study Guide and Notes for SL/HL. Posted by Dora Seigel | Nov 8, AM. International Baccalaureate (IB) For example, if you hope to read about Population change, use Command + F to bring up the search function. Type in “Population change” and it will bring up all of the study materials for Population change.
1 IGCSE Geography () Unit Population Dynamics What you need to know and be able to do: Tick off those you feel confident about: Describe and suggest reasons for the rapid increase in the world’s population in recent times, ‘the.
The International Baccalaureate (IB), formerly known as the International Baccalaureate Organization (IBO), is an international educational foundation headquartered in Geneva, Switzerland, and founded in It offers four educational programmes: the IB Diploma Programme and the IB Career-related Programme for students aged 16 to 19, the IB Middle Years Programme for students aged 11 to Extracts from this document Introduction.
Hints and tips GEOGRAPHY GCSE CASE STUDIES AND NOTES Use geographical terms in your answers wherever possible Understand meaning of terms used in questions: explain = give reasons for describe = say what it shows distribution = how things are arranged, where they can be found relief = shape of the land layout = where things are pattern/trend.