Master Edexcel IGCSE Human Biology (4HB1) by refining your command word precision, perfecting your biological drawings, showing explicit workings in mathematical questions, and avoiding classic spelling and conceptual traps like 'ureter' vs 'urethra' and vaccine contents.
อ่าน 4 นาทีอัปเดตเมื่อ: 21 มิ.ย. 2569
ภาพรวมข้อสอบ
จำนวนฉบับ
2
คะแนนเต็ม
180
เวลาสอบ
3ชม. 30นาที
ประเภทคำถาม
4
ฉบับ
เวลา
คะแนน
จำนวนข้อ
น้ำหนักคะแนน
ประเภทคำถาม
Paper 1R (Regional)
1ชม. 45นาที
90
26
50%
Sentence Completion / Gap Fill, Calculation, Diagram Drawing / Labeling, Short Answer / Identification, Extended Answer / Explanation
Paper 2R (Regional)
1ชม. 45นาที
90
27
50%
Multiple Choice, Sentence Completion / Gap Fill, Calculation, Diagram Drawing / Labeling, Short Answer / Identification, Extended Answer / Explanation
เกณฑ์เกรด
987654321U
ข้อกำหนดเครื่องคิดเลข
A scientific or graphical calculator is permitted. Graphical calculators must be in exam mode with all stored programs and data cleared before the exam; the calculator must not be able to retrieve stored text or formulae.
AO1: AO1: Knowledge and understanding of human biology (40%)
AO2: AO2: Application of knowledge and understanding, analysis and evaluation (38%)
AO3: AO3: Experimental skills, analysis and evaluation of data and methods (22%)
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, but clear stored programs/data (graphical calculators in exam mode) and show the required working — unsupported calculator answers score no method marks.
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, but clear stored programs/data (graphical calculators in exam mode) and show the required working — unsupported calculator answers score no method marks.
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, but clear stored programs/data (graphical calculators in exam mode) and show the required working — unsupported calculator answers score no method marks.
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, but clear stored programs/data (graphical calculators in exam mode) and show the required working — unsupported calculator answers score no method marks.
ข้อผิดพลาดที่พบบ่อย
1highคะแนนที่เกี่ยวข้อง: 2Homeostatic mechanisms
Confusing the 'ureter' with the 'urethra' in anatomical descriptions of the urinary system.
วิธีหลีกเลี่ยง: Use a simple spelling rule: the ureteR runs from the kidney to the Bladder (R comes before B in 'Ureter' to 'Bladder' pipeline), while the urethRa carries urine Out of the body (R is closer to Out/Release).
2highคะแนนที่เกี่ยวข้อง: 2Internal transport
Forgetting to convert units from dm3 to cm3 (or vice-versa) during cardiac output calculations.
วิธีหลีกเลี่ยง: Always check the units specified in the question prompt and the answer line. Remember that 1 dm3 = 1000 cm3. Write down your conversion factor before starting any math.
3mediumคะแนนที่เกี่ยวข้อง: 2Disease
Stating that vaccines contain antibodies instead of antigens.
วิธีหลีกเลี่ยง: Always state that vaccines contain dead, weakened, or inactive pathogens which possess specific antigens. These antigens stimulate the host's lymphocytes to produce their own complementary antibodies.
4mediumคะแนนที่เกี่ยวข้อง: 1Cells and tissues
Drawing lines or curves of best fit freehand or using sketchy, double-drawn lines on graphs.
วิธีหลีกเลี่ยง: Always use a sharp pencil and a ruler for straight lines of best fit, or a single, smooth, continuous curved line if the trend is non-linear. Never connect points dot-to-dot unless explicitly directed.
5highคะแนนที่เกี่ยวข้อง: 2Coordination
Failing to specify that ciliary muscles relax (and not suspensory ligaments contracting) during accommodation for distant vision.
วิธีหลีกเลี่ยง: Remember that suspensory ligaments are non-muscular and cannot contract actively. The ciliary muscles relax, which pulls the suspensory ligaments tight/taut, stretching the lens thin.
6mediumคะแนนที่เกี่ยวข้อง: 2Internal transport
Using everyday colloquial terms like 'scab' when describing blood clotting processes.
วิธีหลีกเลี่ยง: Use accurate scientific terms: explain that platelets release chemical factors leading to the formation of a fibrin mesh/plug that traps red blood cells to block pathogen entry.
7highคะแนนที่เกี่ยวข้อง: 3Reproduction and heredity
Leaving genetics genotype representations without the sex chromosomes (X and Y) when detailing sex-linked diseases like colour blindness.
วิธีหลีกเลี่ยง: Always write sex-linked alleles as superscripts on the sex chromosomes: e.g., use X^B and X^b for genotypes instead of just B and b.
8mediumคะแนนที่เกี่ยวข้อง: 1Bones, muscles and joints
Confusing tendons and ligaments in skeletal labelling.
วิธีหลีกเลี่ยง: Remember the mnemonic: Tendons Tie muscle to bone (T-T); Ligaments Link bone to bone (L-L).
9mediumคะแนนที่เกี่ยวข้อง: 2Reproduction and heredity
Failing to divide or multiply values by 60 when converting calculation tasks involving time between seconds and minutes.
วิธีหลีกเลี่ยง: Underline the time units requested on the final answer line (e.g. per minute vs per second) and ensure you convert your calculated intermediate figures accordingly.