An evidence-based study and exam-tips package for Pearson Edexcel GCSE (9-1) Chemistry (1CH0), specifically optimized for Foundation tier students to maximize marks in Paper 1F and Paper 2F.
อ่าน 3 นาทีอัปเดตเมื่อ: 21 มิ.ย. 2569
ภาพรวมข้อสอบ
จำนวนฉบับ
2
คะแนนเต็ม
200
เวลาสอบ
3ชม. 30นาที
ประเภทคำถาม
3
ฉบับ
เวลา
คะแนน
จำนวนข้อ
น้ำหนักคะแนน
ประเภทคำถาม
Paper 1 (Foundation Tier)
1ชม. 45นาที
100
36
50%
Multiple Choice, Short Answer / Structured, Extended Writing
Paper 2 (Foundation Tier)
1ชม. 45นาที
100
34
50%
Multiple Choice, Short Answer / Structured, Extended Writing
เกณฑ์เกรด
54321U
ข้อกำหนดเครื่องคิดเลข
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: AO1: Demonstrate knowledge and understanding of scientific ideas, processes, techniques and procedures. (40%)
AO2: AO2: Apply knowledge, understanding and skills in scientific ideas, processes, techniques and procedures. (40%)
AO3: AO3: Analyse and evaluate scientific information, methodologies and protocols. (20%)
วัตถุประสงค์: Tabulate \(y\) across a range of \(x\) to locate sign changes (roots) and approximate maxima/minima.
ใช้เมื่อใด: Solving or sketching a function when you want to find where its graph crosses or turns.
ขั้นตอน
Enter the function in TABLE mode, set the start, end and step, then read where the sign of \(y\) changes or where it peaks.
ข้อควรระวังในการสอบ: 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)
วัตถุประสงค์: Read the mean \(\bar{x}\) and standard deviation directly, and the gradient/intercept (and \(r\)) of a linear regression for bivariate data.
ใช้เมื่อใด: Any data-handling, statistics, or required-practical analysis question.
ขั้นตอน
Enter the data in STAT mode (1-VAR or A+BX), then recall \(\bar{x}\), \(\sigma\) or the regression coefficients.
ข้อควรระวังในการสอบ: 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)
วัตถุประสงค์: Keep full-precision intermediate values to avoid rounding errors.
ใช้เมื่อใด: Multi-step calculations where premature rounding loses the final accuracy mark.
ขั้นตอน
Use Ans, STO/RCL or the M+ memory to reuse the unrounded result of each step; round only the final answer.
ข้อควรระวังในการสอบ: 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)
วัตถุประสงค์: Use the built-in EQN/SOLVE mode to verify roots of quadratics or simultaneous equations you have already solved by algebra.
ใช้เมื่อใด: As a check only, after solving by hand.
ขั้นตอน
Enter the coefficients in EQN mode (or use SOLVE) and confirm they match your worked solution.
ข้อควรระวังในการสอบ: 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.
ข้อผิดพลาดที่พบบ่อย
1highคะแนนที่เกี่ยวข้อง: 3Key concepts in chemistry (Paper 1)
Dividing Relative Atomic Mass (RAM) by the reacting mass/percentage of the element when calculating empirical formulas.
วิธีหลีกเลี่ยง: Always divide reacting mass or percentage by the RAM (mass / RAM). Use a table format to keep columns organized for each element.
Using hydrochloric acid (HCl) to acidify a sample before testing for chloride ions with silver nitrate.
วิธีหลีกเลี่ยง: Use dilute nitric acid (HNO3) instead. Hydrochloric acid contains chloride ions (Cl-) which react with silver nitrate, creating a false positive white precipitate.
3mediumคะแนนที่เกี่ยวข้อง: 2Key concepts in chemistry (Paper 1)
Drawing multiple connecting lines from a single item on match-up/link questions, which automatically negates the marks.
วิธีหลีกเลี่ยง: Ensure only ONE straight line is drawn from each box on the left to its corresponding box on the right.
4highคะแนนที่เกี่ยวข้อง: 3Rates of reaction and energy changes (Paper 2)
Failing to convert units of time or coordinates properly during rate-of-reaction graph calculations.
วิธีหลีกเลี่ยง: Read units carefully. If the rate requires cm3 per second and the graph is in minutes, convert the minutes to seconds by multiplying by 60.
5highคะแนนที่เกี่ยวข้อง: 3Key concepts in chemistry (Paper 1)
Writing that solid ionic compounds do not conduct electricity because 'their electrons cannot move'.
วิธีหลีกเลี่ยง: State clearly that the ions (not electrons) are held in a fixed lattice/giant structure by strong electrostatic forces and are not free to move.
6mediumคะแนนที่เกี่ยวข้อง: 3Rates of reaction and energy changes (Paper 2)
Omitting the subtraction step when calculating a rate using a tangent line on a graph.
วิธีหลีกเลี่ยง: Show your full coordinate subtraction: (y2 - y1) / (x2 - x1) to represent the change in volume divided by the change in time.