Science Exam 2025 Revision Quiz

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Immunity & Disease

1. What is a pathogen?
A. A harmless organism living in the body
B. Any organism or agent that causes disease
C. A type of antibody in the blood
D. A white blood cell
Answer: B

2. Which of the following is not a type of pathogen?
A. Virus
B. Bacteria
C. Fungi
D. Vitamin
Answer: D

3. What is an antigen?
A. A molecule on a pathogen that triggers an immune response
B. A protein released by white blood cells
C. A vaccine injected into the body
D. A type of antibiotic
Answer: A

4. Where are antibodies found?
A. In pathogens
B. On the skin surface
C. In the blood and lymph
D. In the lungs
Answer: C

5. Antibiotics are used to treat:
A. Viral infections
B. Bacterial infections
C. Fungal infections only
D. All diseases
Answer: B

6. Which is a sign of infection?
A. Low body temperature
B. Redness and swelling
C. No change in body function
D. Decreased heart rate
Answer: B

7. What is the microbiome?
A. A group of pathogens
B. Helpful microorganisms living in and on the body
C. Lab-grown bacteria
D. A type of immunity
Answer: B

8. Which of the following is a parasite?
A. Influenza virus
B. Tapeworm
C. E. coli
D. Yeast
Answer: B

9. A vector is:
A. A person who gives medication
B. An organism that spreads disease
C. A type of bacteria
D. A white blood cell
Answer: B

10. Quarantine is used to:
A. Increase transmission
B. Prevent transmission
C. Kill pathogens inside the body
D. Strengthen immunity
Answer: B

Transmission & Body Defenses

11. Which is NOT a mode of disease transmission?
A. Direct contact
B. Airborne
C. Radiation
D. Vector-borne
Answer: C

12. The first line of defense includes:
A. Skin and mucous membranes
B. Antibodies
C. Vaccination
D. White blood cells
Answer: A

13. The second line of defense includes:
A. Tears and saliva
B. Fever and inflammation
C. Memory cells
D. Vaccines
Answer: B

14. The third line of defense is:
A. Non-specific immunity
B. Specific immune response
C. The skin
D. Reflexes
Answer: B

15. Natural active immunity occurs when:
A. You get sick and recover
B. You receive a vaccine
C. You receive antibodies from your mother
D. You are given an antibody injection
Answer: A

16. Artificial passive immunity involves:
A. Vaccines
B. Breastfeeding
C. Injection of antibodies
D. Natural exposure to pathogens
Answer: C

Energy & Waves

17. A transverse wave moves:
A. Parallel to the direction of energy
B. Perpendicular to the direction of energy
C. In circles
D. Randomly
Answer: B

18. Which is a longitudinal wave?
A. Water wave
B. Light
C. Sound
D. Radio wave
Answer: C

19. Which is a property of sound waves?
A. They travel fastest in gases
B. They require a medium
C. They are transverse
D. They are part of the EM spectrum
Answer: B

20. Which has the longest wavelength in the EM spectrum?
A. X-rays
B. Gamma rays
C. Radio waves
D. UV
Answer: C

21. Reflection occurs when:
A. A wave bends
B. A wave changes speed
C. A wave bounces off a surface
D. A wave disappears
Answer: C

22. Refraction is:
A. Bending of light as it enters a new medium
B. Light bouncing off a surface
C. Production of new light
D. Light absorbed by objects
Answer: A

23. Dispersion is:
A. Light spreading into colours
B. Light bouncing
C. Light travelling at constant speed
D. Light being destroyed
Answer: A

24. Conduction transfers heat through:
A. Air movement
B. Direct contact
C. Empty space
D. Radiation
Answer: B

25. Which heat transfer occurs in fluids (liquids and gases)?
A. Conduction
B. Convection
C. Reflection
D. Radiation
Answer: B

Ecosystems

26. What is an ecosystem?
A. Only plants
B. All living things and their environment
C. A group of the same species
D. A food chain
Answer: B

27. Population means:
A. All organisms living in an ecosystem
B. All organisms of one species in an area
C. Non-living factors
D. Decomposers only
Answer: B

28. Producers are organisms that:
A. Eat other organisms
B. Break down dead matter
C. Make their own food
D. Consume only plants
Answer: C

29. Which is a decomposer?
A. Rabbit
B. Wolf
C. Bacteria
D. Grass
Answer: C

30. Random sampling is used when:
A. The environment is uniform
B. A specific pattern is needed
C. Only one organism exists
D. Samples must follow a straight line
Answer: A
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