IB Group 4 subjects

The Group Four of IB Diploma Programme subjects, subtitled experimental sciences, consists of biology, chemistry, physics, Design Technology, and environmental systems. The last subject is only available at the Standard Level (SL). There is also a pilot programme, ecosystems and societies, available at certain schools that counts for both a Group 3 and a Group 4 subject. Students taking two (or in exceptional circumstances, three) Group 4 subjects may combine any of the aforementioned except for environmental systems and biology.

tructure and assessment

Group 4 subjects follow roughly the same format. Each subject has its Subject Specific Core (SSC), i.e., material taught at both the standard and higher levels. Students sitting the Higher Level examination study the Additional Higher Level (AHL) material. Lastly, there is a list of options for each subject from which two are chosen. Higher Level students are sometimes unable to choose certain options that are available to Standard Level students because the AHL already covers it. Ideally, students choose the options based on their own abilities and preferences, but in practice the options are usually chosen by the school (based on the school's scientific facilities as well as the discretion of the instructor). Students spend one-quarter of the 150 hours of SL instruction (240 hours for HL; however, both numbers are merely recommendations and are not enforced) doing practical work in the laboratory. Group 4 subjects at the Standard Level are tailored for students who do not see themselves in further science instruction after leaving the programme.

Assessment of a Group 4 subject comprises the following:
*Internal assessment of the practical work (24%)
*Paper 1 - multiple choice questions on the SSC (20%)
*Paper 2 - free response questions on the SSC (32% at SL, 36% at HL)
*Paper 3 - free response questions on the options (24% at SL, 20% at HL)

At the Standard Level, the examinations are respectively 45 minutes, 1 hour and 15 minutes, and 1 hour long. At the Higher Level, they are 1 hour, 2 hours and 15 minutes, and 1 hour and 15 minutes long. Calculators are not permitted for Paper 1, but they (as well as a provided formula booklet and periodic table) are permitted for papers 2 and 3.

Biology

:"Note: The biology syllabus is undergoing revision for the May 2006 examination session. Please edit this section as updates become known."

Biology is the science of life and living organisms. Aside from instruction relevant to this, students are given the chance to learn complex laboratory techniques (e.g., DNA extraction) as well as develop mindful opinions about controversial topics in biology (e.g., stem-cell research and genetic modification). The syllabus lists thirteen topics, to be covered in an order varying from school to school:

#Cells
**1.1 Cell Theory
**1.2 Prokaryotic Cells
**1.3 Eukaryotic Cells
**1.4 Membranes
**1.5 Cell Division
#Chemistry of Life
**2.1 Chemical elements and water
**2.2 Carbohydrates, lipids and proteins
**2.3 Enzymes
**2.4 DNA Structure
**2.5 DNA Replication
**2.6 Transcription and translation
**2.7 Cell Respiration
**2.8 Photosynthesis
#Genetics
#Ecology and evolution
#4.1 Communities and ecosystems
#4.2 Populations
#4.3 Evolution
#4.4 Classification
#4.5 Human Impact
#Health and human physiology
#Nucleic acids and proteins
#Cellular respiration and photosynthesis
#Further genetics
#Human reproduction
**9.1 Production of Gametes
**9.2 Fertilization and pregnancy
#Defense against infectious disease
#Nerves, muscle, and movement
#Excretion
**12.1 Excretion
**12.2 The human kidney
#Plant Science
**13.1 Plant structure
**13.2 Transport in angiospermophytes
**13.3 Reproduction in flowering plants

The options:

*A - Diet and human nutrition
*B - Physiology of exercise
*C - Cells and energy
**C.1 Proteins
**C.2 Enzymes
**C.3 Cell respiration
**C.4 Photosynthesis
*D - Evolution
**Core (SL + HL)
***D.1 Origin of life on Earth
***D.2 Origin of species
***D.3 Evidence for evolution
***D.4 Human evolution
**Extension (HL only)
***G.4 The nitrogen cycle
***G.5 Impacts of humans on ecosystems
*E - Neurobiology and behaviour
*F - Applied plant and animal science
*G - Ecology and conservation
**Core (SL + HL)
***G.1 Ecology of species
***G.2 Ecology of communities
***G.3 Biodiversity and conservation
**Extension (HL only)
***G.4 The nitrogen cycle
***G.5 Impacts of humans on ecosystems
*H - Further human physiology.
**H.1 Hormonal control
**H.2 Digestion
**H.3 Absorption of digested foods
**H.4 Functions of the liver
**H.5 The transport system
**H.6 Gas exchange

The theory is covered in detail on a number of websites [http://www.patana.ac.th/secondary/science/index.home.htm] [http://www.saburchill.com/IBbiology/bio_hp.html]

The Internal Assessment for Biology includes the submission of a number of lab reports covering certain skills like ability to plan an experiment, ability to present data and ability to process data. Overall these count for 24 percent of a student's final grade.

Group 4 project

All students of the Diploma Programme in any of these subjects will compulsorily complete a Group 4 project, an empirical activity which pertains to each of the Group 4 subjects. Students from the each of the different subjects will form groups, select a topic, and present how their science is relevant to the topic. For example, a successful Group 4 project on mentos and coke phenomenon could comprise of a biology student describing the effects of mixing the two in the mouth, a chemistry student describing the chemical reactions taking place, and a physics student describing the surface of mentos. [ [http://www.ibsurvival.com/forum/index.php?showtopic=289&st=20 Group 4 project topics ] ] The students collaborate on the Group 4 project report, which includes a personal summary of their involvement in the project. Some schools choose to have this formatively assessed, others do not. In consequence, for some schools the Group 4 project is almost entirely a formality, counting for very little of a student's final mark.

References

http://www.ibo.org/diploma/curriculum/group4/IBO Diploma Programme curriculum Group 4: experimental sciences