Cambridge Secondary Year 8 Science

Biology End-of-Term Assessment

Syllabus Area: Diet, Growth, Locomotion, and Health

Scheduled Assessment Date:
June 2026
Total Marks Available 30 Marks
Suggested Time Allocation 45 Minutes
Target Level Grade 7-9 (Advanced)
Exam Timer: 45:00

Candidate Information

Section A: Multiple Choice Questions

Answer all questions. Each correct option yields exactly $1\text{ mark}$.

Q1. Which nutrient is correctly matched with its key metabolic function inside the human body?

1 Mark

Q2. Based on the dietary fibre database in your workbook, which of the following foods contains absolutely no dietary fibre ($0\text{ g}$ per $100\text{ g}$ of food)?

1 Mark

Q3. If an individual constantly consumes more dietary energy than they spend, how does the body store this extra nutrition?

1 Mark

Q4. How do the skeletal muscles of the human arm act when bending (flexing) the elbow joint?

1 Mark

Q5. Based on the clinical epidemiological data in your workbook, which type of disease shows the highest percentage of deaths caused directly by smoking in men?

1 Mark

Section B: Nutrient Analysis & Balanced Diet

Solve calculations, complete datasets, and analyze nutritional matrices.

10 Marks Total

Nutrient Reference Matrix (Workbook 7.1B) — Content per $100\text{ g}$ of Food:

Food Protein ($\text{g}$) Fat & Oil ($\text{g}$) Carbohydrate ($\text{g}$) Calcium ($\text{mg}$) Vitamin C ($\text{mg}$)
Brazil Nuts126041800
Chapatis81350700
Chicken297000
Coconut336420
Milk3451201
Orange1994050

Q6. Based on the nutritional table:

3 Marks

Part A (1 Mark): Calculate the total mass of fat and oil (in grams) found inside a double serving ($200\text{ g}$) of whole milk.

Part B (2 Marks): Marcus says: "Brazil nuts contain more calcium than all other listed nutrients combined." Sofia says: "Brazil nuts contain more fat than all other listed nutrients combined." Determine who is correct using quantitative proof from the table.

Q7. Synthesizing structural biology: Complete the blank cells in the functional nutrient outline below.

4 Marks

Provide the correct nutrient name or function corresponding to the biological roles:

Nutrient: Iron
Nutrient: Vitamin D
Function: Night Vision Support
Function: Structural Growth & Cell Division

Q8. Based on the Dietary Fibre Content Database (Workbook 7.2A), a meal contains:
$200\text{ g}$ of chicken, $200\text{ g}$ of rice, and $100\text{ g}$ of spinach.

3 Marks
Fibre reference metrics: Chicken: $0\text{ g}$ per $100\text{ g}$ | Rice: $3\text{ g}$ per $100\text{ g}$ | Spinach: $6\text{ g}$ per $100\text{ g}$.

Part A (2 Marks): Compute the net mass of dietary fibre inside the entire meal. Show your mathematical steps clearly.

Part B (1 Mark): State one biological reason why dietary fibre must be included in our diet despite not providing chemical energy.

Section C: Physiology, Locomotion, and Public Health

Deep structural biology, epidemiological data charts, and muscle kinematics.

15 Marks Total

Q9. Energy requirements across human life stages (Based on Workbook 7.2B):

5 Marks
Mean Daily Energy Demands (MegaJoules, $\text{MJ}$):
8-year-old girl
$2.8\text{ MJ}$
8-year-old boy
$3.0\text{ MJ}$
Teenage boy
$10.0\text{ MJ}$
Adult woman
$7.0\text{ MJ}$
Adult man
$9.2\text{ MJ}$

Part A (1 Mark): Extract the approximate daily energy intake required for an 8-year-old girl in Megajoules ($\text{MJ}$).

Part B (2 Marks): Provide a comprehensive physiological explanation for why an average 8-year-old boy has drastically lower daily energy requirements ($3.0\text{ MJ}$) compared to a teenage boy ($10.0\text{ MJ}$).

Part C (2 Marks): Suggest why, on average, a physically active adult woman might still require less daily energy than an average adult man, linking biological factors like metabolic rate, average muscle-to-fat ratios, and body mass.

Q10. Public Health & Respiratory Pathology (Based on Workbook 7.3):

5 Marks
Epidemiological Context: High-resolution national statistics reveal that for every $200$ adult men who die from chronic obstructive respiratory disease, exactly $80$ of those deaths were directly caused by smoking tobacco cigarettes.

Part A (2 Marks): Calculate the exact percentage of adult male deaths from respiratory disease that are caused by smoking. Show your mathematical process.

Part B (3 Marks): Explain how inhalation of hot cigarette smoke impairs the respiratory system. Your response must specifically mention the action of **tar**, the function of the **ciliated epithelial cells**, and the resulting clinical outcome.

Q11. Kinematics of Muscular-Skeletal Movement (Workbook 7.4 Portion):

5 Marks

Part A (2 Marks): The biceps and triceps muscles in the upper arm are classified as an antagonistic pair. Explain exactly what this term means, highlighting why two separate muscles are absolutely necessary to bend and straighten a single hinge joint.

Part B (3 Marks): Name the specific types of joints found at: (1) the elbow, and (2) the shoulder. Describe how the range of physical movement differs between these two joint architectures.

Ready to submit your Exam?

Make sure you have answered all sections. Once submitted, your answers will be locked, graded, and model feedback will be displayed below each question.