Everyday Science MCQs

89 Questions
81
Medium fpsc ppsc nts

Which process explains why sweating helps cool the human body?

  • A Conduction
  • B Convection
  • C Evaporation
  • D Radiation
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Correct Answer: Option C — Evaporation
Explanation: Sweating cools the body through evaporation as sweat absorbs heat from the skin and turns into vapor effectively removing thermal energy and lowering body temperature.
82
Medium fpsc ppsc nts

Which household appliance operates on the principle of electromagnetic induction to heat food?

  • A Microwave oven
  • B Induction stove
  • C Electric kettle
  • D Toaster
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Correct Answer: Option B — Induction stove
Explanation: Induction stoves use electromagnetic induction to generate heat directly within ferromagnetic cookware making them more energy efficient than traditional electric or gas stoves.
83
Medium fpsc ppsc nts

Which property of light explains why a straw appears bent when placed in a glass of water?

  • A Reflection
  • B Refraction
  • C Diffraction
  • D Dispersion
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Correct Answer: Option B — Refraction
Explanation: Refraction is the bending of light as it passes from one medium to another with different optical densities causing the straw to appear bent at the water's surface.
84
Medium fpsc ppsc nts

Which type of mirror is commonly used in vehicle side mirrors to provide a wider field of view?

  • A Concave mirror
  • B Convex mirror
  • C Plane mirror
  • D Parabolic mirror
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Correct Answer: Option B — Convex mirror
Explanation: Convex mirrors are used in vehicle side mirrors because they diverge light rays producing a smaller but wider field of view helping drivers see more of their surroundings.
85
Medium fpsc ppsc nts

Which simple machine is used in a pair of scissors?

  • A Lever
  • B Pulley
  • C Wheel and axle
  • D Inclined plane
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Correct Answer: Option A — Lever
Explanation: Scissors function as a compound lever where two blades pivot around a fixed point allowing mechanical advantage to cut through materials with reduced applied force.
86
Easy fpsc ppsc nts

Which gas do plants primarily absorb during photosynthesis?

  • A Oxygen
  • B Carbon dioxide
  • C Nitrogen
  • D Hydrogen
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Correct Answer: Option B — Carbon dioxide
Explanation: Plants absorb carbon dioxide from the atmosphere during photosynthesis using sunlight and water to convert it into glucose and oxygen which is released as a byproduct.
87
Easy fpsc ppsc nts

Which organ in the human body is primarily responsible for filtering blood and removing waste?

  • A Liver
  • B Kidney
  • C Spleen
  • D Pancreas
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Correct Answer: Option B — Kidney
Explanation: The kidneys filter blood to remove metabolic waste products and excess fluids excreting them as urine while also regulating electrolyte balance and blood pressure in the body.
88
Easy fpsc ppsc nts

Which vitamin is primarily synthesized in human skin upon sunlight exposure?

  • A Vitamin A
  • B Vitamin C
  • C Vitamin D
  • D Vitamin K
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Correct Answer: Option C — Vitamin D
Explanation: Vitamin D is synthesized in the skin when exposed to ultraviolet B rays from sunlight and is essential for calcium absorption and maintaining healthy bones and immune function.
89
Easy fpsc ppsc nts

Which part of the human eye controls the amount of light entering it?

  • A Retina
  • B Cornea
  • C Iris
  • D Lens
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Correct Answer: Option C — Iris
Explanation: The iris is the colored muscular structure that controls pupil size thereby regulating the amount of light entering the eye to ensure clear vision under varying light conditions.