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Everyday Science MCQs

387 Questions Subject Test
Subject Preparation Guide

Prepare Everyday Science with confidence

Understand the science behind daily life through questions covering health, energy, environment, inventions and natural phenomena.

Human BodyEnergyEnvironmentScientific Inventions
Important for general science portions of CSS, PMS, FPSC and provincial tests.
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281
Medium fpsc ppsc nts

Which part of the human ear converts sound vibrations into electrical signals for the brain?

  • A Eardrum
  • B Cochlea
  • C Outer ear
  • D Eustachian tube
Permalink
Correct Answer: Option B — Cochlea
Explanation: The cochlea located in the inner ear converts sound vibrations into electrical nerve signals which are then transmitted to the brain via the auditory nerve for interpretation.
Submitted by: PaperMCQs
282
Medium fpsc ppsc nts

Which part of the human ear is primarily responsible for maintaining balance?

  • A Cochlea
  • B Semicircular canals
  • C Eardrum
  • D Auditory nerve
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Correct Answer: Option B — Semicircular canals
Explanation: The semicircular canals located in the inner ear detect rotational movements of the head and play a primary role in maintaining body balance and spatial orientation.
Submitted by: PaperMCQs
283
Medium fpsc ppsc nts

Which gas is most responsible for causing acid rain when it reacts with atmospheric moisture?

  • A Carbon dioxide
  • B Sulfur dioxide
  • C Nitrogen
  • D Helium
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Correct Answer: Option B — Sulfur dioxide
Explanation: Sulfur dioxide released from burning fossil fuels reacts with water vapor in the atmosphere forming sulfuric acid which falls as acid rain damaging soil water bodies and structures.
Submitted by: PaperMCQs
284
Easy fpsc ppsc nts

Which everyday safety practice helps protect skin from harmful ultraviolet radiation during sun exposure?

  • A Wearing dark clothing only
  • B Applying sunscreen
  • C Drinking more water
  • D Avoiding all outdoor activity
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Correct Answer: Option B — Applying sunscreen
Explanation: Applying sunscreen helps protect skin from harmful ultraviolet radiation by absorbing or reflecting UV rays reducing the risk of sunburn and long term skin damage from sun exposure.
Submitted by: PaperMCQs
285
Medium fpsc ppsc nts

Which everyday phenomenon explains why a wet cloth dries faster on a windy day compared to a calm day?

  • A Increased evaporation due to air movement
  • B Decreased evaporation due to air movement
  • C Increased condensation
  • D Sublimation effect
Permalink
Correct Answer: Option A — Increased evaporation due to air movement
Explanation: Wind increases evaporation by continuously removing the saturated air layer near the wet cloth surface allowing more water molecules to escape into the atmosphere causing faster drying.
Submitted by: PaperMCQs
286
Medium fpsc ppsc nts

Which everyday biological process allows the human body to maintain a stable internal environment despite external changes?

  • A Metabolism
  • B Homeostasis
  • C Osmosis
  • D Respiration
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Correct Answer: Option B — Homeostasis
Explanation: Homeostasis is the process by which the human body maintains a stable internal environment such as temperature and pH despite changes in the external surroundings.
Submitted by: PaperMCQs
287
Medium fpsc ppsc nts

Which everyday material is commonly used to absorb excess moisture in packaged goods to prevent spoilage?

  • A Silica gel
  • B Table salt
  • C Baking soda
  • D Cotton
Permalink
Correct Answer: Option A — Silica gel
Explanation: Silica gel packets are commonly placed in packaged goods to absorb excess moisture preventing mold growth and preserving the quality of products like electronics and dried foods.
Submitted by: PaperMCQs
288
Medium fpsc ppsc nts

Which everyday chemical process explains why sliced apples turn brown after being exposed to air?

  • A Reduction reaction
  • B Oxidation reaction
  • C Neutralization reaction
  • D Sublimation
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Correct Answer: Option B — Oxidation reaction
Explanation: Sliced apples turn brown due to an oxidation reaction where enzymes react with oxygen in the air converting certain compounds into brown colored substances on the cut surface.
Submitted by: PaperMCQs
289
Medium fpsc ppsc nts

Which everyday device uses a small magnifying lens system to examine tiny objects not visible to the naked eye?

  • A Telescope
  • B Microscope
  • C Periscope
  • D Binoculars
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Correct Answer: Option B — Microscope
Explanation: A microscope uses a system of lenses to magnify tiny objects such as cells and microorganisms allowing detailed observation that is impossible with the naked eye alone.
Submitted by: PaperMCQs
290
Medium fpsc ppsc nts

Which everyday optical device uses a combination of lenses to magnify distant objects?

  • A Microscope
  • B Telescope
  • C Periscope
  • D Stethoscope
Permalink
Correct Answer: Option B — Telescope
Explanation: A telescope uses a combination of lenses or mirrors to collect and magnify light from distant objects making them appear closer and clearer to the observer.
Submitted by: PaperMCQs
291
Easy fpsc ppsc nts

Which household practice helps prevent the growth of mold in damp areas like bathrooms?

  • A Increasing humidity
  • B Proper ventilation
  • C Closing all windows
  • D Reducing sunlight exposure
Permalink
Correct Answer: Option B — Proper ventilation
Explanation: Proper ventilation reduces moisture buildup in damp areas like bathrooms preventing the conditions mold spores need to grow and spread across surfaces.
Submitted by: PaperMCQs
292
Medium fpsc ppsc nts

Which property of sound determines how high or low it is perceived by the human ear?

  • A Amplitude
  • B Frequency
  • C Wavelength
  • D Speed
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Correct Answer: Option B — Frequency
Explanation: Frequency determines the pitch of sound with higher frequencies perceived as higher pitched tones and lower frequencies perceived as deeper sounds by the human ear.
Submitted by: PaperMCQs
293
Easy ppsc nts

Which gas makes up the highest percentage of exhaled human breath besides nitrogen?

  • A Oxygen
  • B Carbon dioxide
  • C Hydrogen
  • D Helium
Permalink
Correct Answer: Option B — Carbon dioxide
Explanation: Exhaled human breath contains a higher concentration of carbon dioxide than inhaled air because cellular respiration produces carbon dioxide as a metabolic waste product that the lungs expel.
Submitted by: PaperMCQs
294
Medium fpsc ppsc nts

Which type of immunity is passed from mother to infant through breast milk or placental transfer?

  • A Active immunity
  • B Passive immunity
  • C Innate immunity
  • D Acquired immunity through vaccination
Permalink
Correct Answer: Option B — Passive immunity
Explanation: Passive immunity is passed from mother to infant through breast milk or placental transfer providing temporary protection against infections during the early stages of an infant's life.
Submitted by: PaperMCQs
295
Medium fpsc ppsc nts

Which type of immunity is gained through vaccination by introducing a weakened or inactivated pathogen?

  • A Natural immunity
  • B Acquired active immunity
  • C Passive immunity
  • D Innate immunity
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Correct Answer: Option B — Acquired active immunity
Explanation: Acquired active immunity is gained through vaccination by introducing a weakened or inactivated pathogen which stimulates the immune system to produce specific antibodies for future protection.
Submitted by: PaperMCQs
296
Medium fpsc ppsc nts

Which common food item is fortified with iodine in many countries to prevent deficiency related disorders?

  • A Table salt
  • B Sugar
  • C Cooking oil
  • D Flour
Permalink
Correct Answer: Option A — Table salt
Explanation: Table salt is commonly fortified with iodine in many countries as a public health measure to prevent iodine deficiency disorders such as goiter and developmental issues in children.
Submitted by: PaperMCQs
297
Medium fpsc ppsc nts

Which mineral deficiency is commonly associated with goiter due to impaired thyroid hormone production?

  • A Iron deficiency
  • B Iodine deficiency
  • C Calcium deficiency
  • D Zinc deficiency
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Correct Answer: Option B — Iodine deficiency
Explanation: Iodine deficiency impairs thyroid hormone production leading to goiter an enlargement of the thyroid gland as the body attempts to compensate for insufficient hormone synthesis.
Submitted by: PaperMCQs
298
Easy fpsc ppsc nts

Which essential mineral is critical for oxygen transport in the blood as a key component of hemoglobin?

  • A Calcium
  • B Iron
  • C Zinc
  • D Magnesium
Permalink
Correct Answer: Option B — Iron
Explanation: Iron is a critical component of hemoglobin the protein in red blood cells responsible for transporting oxygen throughout the body and its deficiency commonly causes anemia.
Submitted by: PaperMCQs
299
Easy fpsc ppsc nts

Which essential mineral is critical for maintaining strong bones and teeth in the human body?

  • A Iron
  • B Calcium
  • C Potassium
  • D Zinc
Permalink
Correct Answer: Option B — Calcium
Explanation: Calcium is an essential mineral critical for maintaining strong bones and teeth as well as supporting muscle function nerve transmission and proper blood clotting in the body.
Submitted by: PaperMCQs
300
Easy fpsc ppsc nts

Which common preventive health practice helps reduce the transmission of airborne respiratory infections?

  • A Wearing masks
  • B Eating more fruit
  • C Drinking more water
  • D Sleeping longer
Permalink
Correct Answer: Option A — Wearing masks
Explanation: Wearing masks helps reduce the transmission of airborne respiratory infections by blocking respiratory droplets that carry viruses or bacteria from spreading between individuals.
Submitted by: PaperMCQs
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