Replicate the OCR GCSE (9-1) Gateway Science Physics A (J249) exam patterns with evidence-based tips, focusing on avoiding critical units conversions slips, mastering graph skills like drawing tangents, and structure guides for 6-mark Level of Response questions.
閱讀時間 4 分鐘更新於: 2026年6月21日
試卷概覽
卷數
2
總分
180
考試時間
3小時 30分鐘
題型
4
試卷
時間
分數
題數
比重
題型
Higher Tier Paper 3 (Components C1-C3 and C7)
1小時 45分鐘
90
23
50%
選擇題, Short Answer, Calculations, Extended Writing / Level of Response
Higher Tier Paper 4 (Components C4-C6 and C8)
1小時 45分鐘
90
22
50%
選擇題, Short Answer, Calculations, Extended Writing / Level of Response
評級
9876543U
計算機規定
A scientific or graphical calculator that meets JCQ regulations may be used (some GCSE Mathematics and Science papers are non-calculator). Graphical calculators must be set to exam mode; you must clear any stored programs, notes or data before the exam, and the calculator must not be able to retrieve stored text or formulae.
AO1: Demonstrate knowledge and understanding of scientific ideas, techniques, and procedures (40%)
AO2: Apply knowledge and understanding of scientific ideas, enquiry, techniques, and procedures (40%)
AO3: Analyse information and ideas to interpret, evaluate, make judgements, draw conclusions, and improve experimental procedures (20%)
根據歷屆試題與評分準則整理（2022–2024）。
計算機程式
Table mode for roots & turning points
Scientific calculator (e.g. Casio fx-991 series)
用途: Tabulate \(y\) across a range of \(x\) to locate sign changes (roots) and approximate maxima/minima.
使用時機: Solving or sketching a function when you want to find where its graph crosses or turns.
步驟
Enter the function in TABLE mode, set the start, end and step, then read where the sign of \(y\) changes or where it peaks.
考試提示: Allowed under JCQ rules, but you must still show your method — an unsupported calculator answer earns no method marks. Clear all stored programs, notes and data (graphical calculators in exam mode) before the exam.
Statistics mode (mean, SD & regression)
Scientific calculator (e.g. Casio fx-991 series)
用途: Read the mean \(\bar{x}\) and standard deviation directly, and the gradient/intercept (and \(r\)) of a linear regression for bivariate data.
使用時機: Any data-handling, statistics, or required-practical analysis question.
步驟
Enter the data in STAT mode (1-VAR or A+BX), then recall \(\bar{x}\), \(\sigma\) or the regression coefficients.
考試提示: Allowed under JCQ rules, but you must still show your method — an unsupported calculator answer earns no method marks. Clear all stored programs, notes and data (graphical calculators in exam mode) before the exam.
Carry exact values with Ans & memory
Scientific calculator (e.g. Casio fx-991 series)
用途: Keep full-precision intermediate values to avoid rounding errors.
使用時機: Multi-step calculations where premature rounding loses the final accuracy mark.
步驟
Use Ans, STO/RCL or the M+ memory to reuse the unrounded result of each step; round only the final answer.
考試提示: Allowed under JCQ rules, but you must still show your method — an unsupported calculator answer earns no method marks. Clear all stored programs, notes and data (graphical calculators in exam mode) before the exam.
Equation solver — to CHECK your working
Scientific calculator (e.g. Casio fx-991 series)
用途: Use the built-in EQN/SOLVE mode to verify roots of quadratics or simultaneous equations you have already solved by algebra.
使用時機: As a check only, after solving by hand.
步驟
Enter the coefficients in EQN mode (or use SOLVE) and confirm they match your worked solution.
考試提示: Allowed under JCQ rules, but you must still show your method — an unsupported calculator answer earns no method marks. Clear all stored programs, notes and data (graphical calculators in exam mode) before the exam.
常見錯誤
1high涉及分數: 3Motion (Forces)
Omitting standard metric conversions (e.g., converting minutes to seconds, or kilometres to metres) before evaluating formulas.
如何避免: Always check and convert units to standard SI values (seconds, metres, kilograms) before substituting them into equations.
2high涉及分數: 2Wave behaviour (Waves in matter)
Drawing 'dot-to-dot' sequences instead of sketching clean, single-ruled lines or smooth curves of best fit.
如何避免: Draw a single, continuous, smooth curve or a straight line using a ruler that balances the points on either side.
3medium涉及分數: 2Simple circuits (Electricity)
Misplacing ammeters in parallel or voltmeters in series, and drawing wires directly crossing out the circular symbols.
如何避免: Always connect ammeters in series and voltmeters in parallel. Ensure your pencil lines do not cross through the inside of the meter circles.
4high涉及分數: 3Motion (Forces)
Failing to explicitly cite coordinate values or data ranges from graphs when answering 6-mark Level of Response trend descriptions.
如何避免: Identify at least two specific coordinates (x, y) on the graph to support your description of any changes in trend.
5medium涉及分數: 2Simple circuits (Electricity)
Inaccurately stating trends on non-linear graphs (saying it is simply a negative correlation without specifying the changing rate).
如何避免: Describe how the rate of change varies. For example, state that 'resistance decreases at a decreasing rate as temperature increases'.
Swapping the physical differences between nuclear fission (splitting) and nuclear fusion (joining) under exam pressure.
如何避免: Remember: Fission is the splitting of a heavy nucleus (like Uranium) when hit by a neutron; Fusion is the joining of light nuclei (like Hydrogen) under high temperature and pressure.
7high涉及分數: 2Wave behaviour (Waves in matter)
Drawing the refracted ray bending away from the normal instead of towards the normal when entering glass.
如何避免: When light enters a more optically dense medium (like glass from air), it slows down and must refract *towards* the normal (angle of refraction < angle of incidence).
8high涉及分數: 4Motion (Forces)
Drawing a chord or secant line that intersects the curve at multiple points instead of grazing the curve at exactly the specified point.
如何避免: Place your ruler so it touches the curve at exactly one point (e.g. t = 1.0 s) with equal space between the ruler and the curve on both sides of the point.
9medium涉及分數: 2Powering Earth (Global challenges)
Assuming step-up transformers increase electric power, when they instead raise potential difference to minimize heat losses by lowering current.
如何避免: Recall that conservation of energy applies: power remains constant (neglecting small efficiency losses). Step-up transformers increase voltage, which decreases current to reduce \( I^2 R \) heating losses in transmission lines.
Confusing contamination with irradiation (e.g., thinking that being irradiated makes an object radioactive).
如何避免: State clearly that irradiation is just exposure to radiation from an external source, whereas contamination is the actual presence of radioactive material on the object.