Biology (1–17)
1. Which part of a plant absorbs water?
A. Leaf
B. Root
C. Stem
D. Flower
2. Which gas do animals exhale?
A. Oxygen
B. Carbon dioxide
C. Nitrogen
D. Helium
3. What is the function of the nucleus?
A. Makes energy
B. Controls the cell
C. Stores water
D. Destroys waste
4. Which system includes the brain and spinal cord?
A. Circulatory
B. Nervous
C. Digestive
D. Respiratory
5. How many chromosomes are in a human body cell?
A. 23
B. 46
C. 92
D. 12
6. Which process produces gametes?
A. Mitosis
B. Fertilization
C. Meiosis
D. Fusion
7. Which part of a flower produces pollen?
A. Stigma
B. Ovary
C. Anther
D. Petal
8. Which nutrient builds muscles?
A. Carbohydrate
B. Fat
C. Protein
D. Vitamin
9. What carries oxygen in red blood cells?
A. Plasma
B. Platelets
C. Hemoglobin
D. Water
10. What is a genotype?
A. Appearance
B. Blood type
C. Genetic makeup
D. Skin color
11. Which disease is spread by mosquitoes?
A. Flu
B. HIV
C. Malaria
D. Cholera
12. Which disease is caused by a virus?
A. Malaria
B. HIV/AIDS
C. Athlete’s foot
D. Tuberculosis
13. Which part of the eye controls the amount of light entering?
A. Retina
B. Lens
C. Iris
D. Cornea
14. Which kingdom do mushrooms belong to?
A. Plantae
B. Fungi
C. Animalia
D. Protista
15. What is the function of xylem in plants?
A. Transport glucose
B. Transport water
C. Photosynthesis
D. Support reproduction
16. Which process releases energy from glucose?
A. Respiration
B. Photosynthesis
C. Digestion
D. Diffusion
17. What is the main function of the digestive system?
A. Pump blood
B. Remove waste
C. Break down food
D. Exchange gases
Chemistry (18–34)
18. Which subatomic particle has a negative charge?
A. Proton
B. Neutron
C. Electron
D. Nucleus
19. What is the formula for water?
A. H2O
B. CO2
C. NaCl
D. O2
20. Which element is a noble gas?
A. Oxygen
B. Helium
C. Chlorine
D. Hydrogen
21. What happens during a chemical reaction?
A. Matter disappears
B. New substances form
C. Atoms are destroyed
D. Energy is lost
22. The pH of a strong acid is:
A. 7
B. 10
C. 1
D. 14
23. Which substance neutralizes an acid?
A. Salt
B. Base
C. Water
D. Gas
24. What is a compound?
A. A single element
B. Two or more atoms chemically combined
C. A mixture
D. A molecule of oxygen
25. Which gas is given off when metal reacts with acid?
A. Oxygen
B. Nitrogen
C. Carbon dioxide
D. Hydrogen
26. Rusting is an example of:
A. Physical change
B. Melting
C. Chemical change
D. Dissolving
27. What is the atomic number of carbon?
A. 6
B. 12
C. 8
D. 4
28. Which metal is the most reactive?
A. Iron
B. Copper
C. Potassium
D. Gold
29. Which method is used to separate salt from water?
A. Filtration
B. Chromatography
C. Evaporation
D. Distillation
30. What is an ion?
A. A neutral atom
B. An atom with charge
C. A water molecule
D. A gas particle
31. Which is a product of neutralisation?
A. Gas
B. Metal
C. Salt
D. Plastic
32. A mixture is:
A. A pure substance
B. Chemically bonded
C. Easily separated
D. Radioactive
33. The periodic table arranges elements by:
A. Atomic number
B. Mass number
C. Alphabet
D. Size
34. Which symbol represents sodium?
A. So
B. Na
C. S
D. Sn
Physics (35–50)
35. Which unit is used to measure force?
A. Joule
B. Newton
C. Watt
D. Pascal
36. What is speed?
A. Distance × time
B. Distance ÷ time
C. Force ÷ area
D. Mass × acceleration
37. A device used to measure current is a:
A. Voltmeter
B. Ammeter
C. Thermometer
D. Barometer
38. What is the speed of light in a vacuum?
A. 3000 km/s
B. 300 km/h
C. 300,000 km/s
D. 3 m/s
39. What type of energy is stored in food?
A. Kinetic
B. Light
C. Chemical
D. Nuclear
40. What is the unit of power?
A. Joule
B. Newton
C. Watt
D. Ohm
41. What causes day and night?
A. Earth’s revolution
B. Moon’s orbit
C. Earth’s rotation
D. Sun’s movement
42. What happens to particles in a solid when heated?
A. They stop moving
B. They move faster
C. They disappear
D. They become smaller
43. What type of heat transfer happens in liquids?
A. Radiation
B. Conduction
C. Convection
D. Absorption
44. Which color absorbs the most heat?
A. White
B. Blue
C. Black
D. Yellow
45. What is reflection?
A. Light passing through
B. Light bending
C. Light bouncing off
D. Light disappearing
46. Which surface is best for reducing friction?
A. Rough
B. Sticky
C. Smooth
D. Wet
47. What is the function of a fuse in a circuit?
A. Store energy
B. Increase voltage
C. Protect from too much current
D. Make sound
48. What happens to sound in a vacuum?
A. Gets louder
B. Travels faster
C. Echoes
D. Cannot travel
49. Gravitational force acts:
A. Sideways
B. Downward
C. Upward
D. In circles
50. An object in motion stays in motion unless acted on by:
A. A machine
B. A force
C. Air
D. Energy
