GCSE The Sciences
Mae disgrifiadau'r TGAU yn Saesneg yn unig, gan eu bod wedi eu cymryd o fanyleb Saesneg CBAC.
The Sciences (Double Award) asks learners to research and evaluate scientific information, including how the media shapes public views, to write balanced answers on ethical and environmental issues, and to write up two scientific enquiries alone under high control using precise terminology. Its numeracy demand is high across six examinations and Unit 7: equations with SI units, chemical calculations, percentages, significant figures, graphs and gradients, sampling, probability in genetics and decay, and payback costs, with standard form, rearranging equations and y = mx + c at higher tier. The single biggest thing Key Stage 3 should build is fluent, well set out calculation from practical data: correct units, substitution into equations, means and graphs, explained in precise scientific language.
- Addysgu gyntaf
- Medi 2026
- Faint o waith llythrennedd
- Canolig
- Faint o waith rhifedd
- Uchel
- Manyleb
- Agor manyleb CBAC (PDF)
Sut mae'r TGAU hwn yn cael ei asesu
- Unit 1: Biology, Basis of Life: Written examination (tiered), 1 hour 15 minutes, 56 marks, 14.3%
- Unit 2: Chemistry, Chemical Substances and How They Behave: Written examination (tiered), 1 hour 15 minutes, 56 marks, 14.3%
- Unit 3: Physics, Forces, Motion and the Universe: Written examination (tiered), 1 hour 15 minutes, 56 marks, 14.3%
- Unit 4: Biology, Continuity of Life: Written examination (tiered), 1 hour 15 minutes, 64 marks, 15.7%
- Unit 5: Chemistry, Chemical Bonding, Reactions and Resources: Written examination (tiered), 1 hour 15 minutes, 64 marks, 15.7%
- Unit 6: Physics, Waves, Electricity and Energy: Written examination (tiered), 1 hour 15 minutes, 64 marks, 15.7%
- Unit 7: Scientific Enquiry: Two enquiries from a choice of three, each a practical task (1 hour) and a written task (1 hour), 28 marks each (56 marks), externally marked by WJEC, 10%
Sgiliau sy'n defnyddio Perthnasoedd yn y system rif
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Analysing data, uncertainty and probability
Learners interpret primary and secondary data, find means, spot anomalies and comment on uncertainty; the uncertainty formula is given in the examination (page 76). Appendix D includes simple probability, used with Punnett squares (page 41) and in modelling random radioactive decay (page 57).
Rhifedd: Dehongli data, Perthnasoedd yn y system rif, Rhesymu rhesymegol
Paratoi disgyblion
- Blwyddyn 7
- Pupils calculate the mean of three repeat readings for how far a toy car rolls, spot any anomaly and explain whether to leave it out.
- Blwyddyn 8
- Pupils toss two coins 40 times to model a genetic cross and compare the fraction of each outcome with the expected 1:2:1 ratio.
- Blwyddyn 9
- Pupils pool whole-class results for a rate of reaction practical, calculate means and the uncertainty for each value, and write a conclusion that says how confident they can be.
Dangos geiriad y fanyleb a datganiadau'r Fframwaith Llythrennedd a Rhifedd
Ble mae yn y fanyleb: Appendix B, Scientific Enquiry Skills Framework, page 74
“interpret primary and secondary data, including identifying patterns and trends, making inferences and drawing conclusions”
Cam cynnydd 3
Rwy'n gallu dod i gasgliadau o ddata ac rwy'n cydnabod y gall rhai casgliadau fod yn gamarweiniol neu'n ansicr.
Rwy'n gallu defnyddio cymedr i ddehongli set data syml.
Rwy'n gallu defnyddio cywerth ffracsiynau, degolion a chanrannau er mwyn cymharu cyfrannau.
Cam cynnydd 4
Rwy'n gallu defnyddio cymedr, canolrif, modd ac ystod i gymharu data (parhaus ac arwahanol), ac rwy'n gallu dewis y cyfartaledd mwyaf priodol.
Rwy'n gallu archwilio tueddiadau a gwerthoedd eithaf (allanolynnau) ar gyfer setiau data.
Rwy'n gallu archwilio canlyniadau yn feirniadol, a dethol a chyfiawnhau dewis o ystadegau, gan gydnabod cyfyngiadau unrhyw ragdybiaethau a'u heffaith ar y casgliadau.
Cam cynnydd 5
Rwy'n gallu dehongli gwybodaeth fathemategol; gan ddod i gasgliadau o graffiau, diagramau a data, gan gynnwys trafod cyfyngiadau data.
Rwy'n gallu dod i gasgliadau o ddata ac rwy'n cydnabod y gall rhai casgliadau fod yn gamarweiniol neu'n ansicr.
Rwy'n gallu cyfiawnhau fy ngweithdrefnau, fy rhagfynegiadau a'm dyfaliadau.
Da gwybod
- Unit 7 has two enquiries. In each, Task 2 (22 marks) is written alone: 'Learners must work independently in high controlled conditions'. In Task 1 (6 marks) 'Learners may work in groups of no more than three' (page 64).
- Exam aids are provided: 'Unit 3 and Unit 6 will include equations on page 2 of the examination question paper', and Units 2 and 5 include a periodic table on the final page (page 66).
- Higher tier only mathematics is shown in bold in Appendix D (page 78): standard form, changing the subject of an equation, y = mx + c, and the gradient, slope and intercept of a linear graph. Converting grams to moles (page 22), calculating rate from a straight line (page 25), acceleration from the gradient of a speed-time graph (page 30) and reacting masses (page 52) are also higher tier content.
- The uncertainty formula is provided: 'There is a formula to calculate this which you will be given in an exam' (Appendix C, page 76).
- AO3, 'Analyse, interpret and evaluate scientific information, processes, techniques and procedures', carries 25% of the marks in each unit (page 66).
- The specification awards no separate marks for spelling, punctuation and grammar and makes no statement about calculator use.
Cysylltiadau â TGAU eraill
The Appendix D mathematics overlaps closely with GCSE Mathematics and Numeracy, the scientific enquiry demands match GCSE Integrated Science, and the climate and sampling work overlaps with Geography.
Ffynhonnell: WJEC GCSE The Sciences (Double Award) specification, teaching from 2026, for award from 2028, © WJEC CBAC Ltd 2025.