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Everyday Science MCQs

181 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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1
Medium fpsc

Which type of muscle is found in the heart?

  • A Smooth muscle
  • B Cardiac muscle
  • C Voluntary muscle
  • D Skeletal muscle
Permalink
Correct Answer: Option B — Cardiac muscle
Explanation: Cardiac muscle is a specialized, involuntary muscle type found only in the heart, capable of continuous rhythmic contractions throughout a person's life. It differs from skeletal muscle in its unique branching structure and resistance to fatigue.
Submitted by: PaperMCQs
2
Medium fpsc

Which part of the human ear helps maintain balance?

  • A Outer ear
  • B Eardrum
  • C Cochlea
  • D Vestibular system
Permalink
Correct Answer: Option D — Vestibular system
Explanation: The vestibular system, located in the inner ear, contains fluid-filled canals that detect head movement and position, helping maintain balance and spatial orientation. Disorders in this system can cause dizziness or vertigo.
Submitted by: PaperMCQs
3
Medium fpsc

Which blood vessels carry blood away from the heart?

  • A Veins
  • B Capillaries
  • C Arteries
  • D Venules
Permalink
Correct Answer: Option C — Arteries
Explanation: Arteries carry oxygenated blood away from the heart to tissues throughout the body, except for the pulmonary artery which carries deoxygenated blood to the lungs. Their thick, elastic walls withstand high pressure from heart contractions.
Submitted by: PaperMCQs
4
Medium fpsc

Which gland is known as the master gland of the human body?

  • A Adrenal gland
  • B Thyroid gland
  • C Pituitary gland
  • D Pineal gland
Permalink
Correct Answer: Option C — Pituitary gland
Explanation: The pituitary gland is called the master gland because it regulates other endocrine glands and controls hormones affecting growth, metabolism, and reproduction. It is located at the base of the brain and works closely with the hypothalamus.
Submitted by: PaperMCQs
5
Medium fpsc

What causes rainbows to form in the sky?

  • A Refraction of light
  • B Absorption of heat
  • C Wind currents
  • D Reflection of clouds
Permalink
Correct Answer: Option A — Refraction of light
Explanation: Rainbows form when sunlight is refracted, or bent, as it passes through raindrops, splitting into its component colors. The light then reflects internally within the droplet and refracts again as it exits, creating the arc of colors.
Submitted by: PaperMCQs
6
Medium fpsc

Which organ produces antibodies to fight infections?

  • A Platelets
  • B Bone marrow
  • C Red blood cells
  • D White blood cells
Permalink
Correct Answer: Option D — White blood cells
Explanation: White blood cells, particularly lymphocytes, produce antibodies that identify and neutralize pathogens like bacteria and viruses. They form a critical part of the immune system's defense against infections and diseases.
Submitted by: PaperMCQs
7
Medium fpsc

What causes the greenhouse effect on Earth?

  • A Trapped heat by gases
  • B Ozone depletion
  • C Solar flares
  • D Ocean currents
Permalink
Correct Answer: Option A — Trapped heat by gases
Explanation: The greenhouse effect occurs when gases like carbon dioxide and methane trap heat from the sun in Earth's atmosphere, warming the planet. While natural and necessary for life, excessive greenhouse gases contribute to global climate change.
Submitted by: PaperMCQs
8
Medium fpsc

What is the pH value of pure water?

  • A 9
  • B 5
  • C 7
  • D 3
Permalink
Correct Answer: Option C — 7
Explanation: Pure water has a pH of 7, making it neutral on the pH scale that ranges from 0 to 14. Values below 7 indicate acidity while values above 7 indicate alkalinity, important in chemistry and biology.
Submitted by: PaperMCQs
9
Medium fpsc ppsc nts

Which device converts sound waves into electrical signals for recording or amplification?

  • A Microphone
  • B Loudspeaker
  • C Capacitor
  • D Battery
Permalink
Correct Answer: Option A — Microphone
Explanation: A microphone uses a diaphragm that vibrates with incoming sound waves and converts those mechanical vibrations into electrical signals through electromagnetic or capacitive transduction.
Submitted by: PaperMCQs
10
Medium fpsc ppsc nts

Which property of water causes it to expand when it freezes making ice less dense than liquid water?

  • A Hydrogen bonding creating a crystalline structure
  • B High specific heat capacity
  • C High surface tension
  • D High viscosity
Permalink
Correct Answer: Option A — Hydrogen bonding creating a crystalline structure
Explanation: Water expands when it freezes because hydrogen bonds arrange water molecules into a hexagonal crystalline lattice that takes up more space than the same number of liquid water molecules.
Submitted by: PaperMCQs
11
Medium fpsc ppsc nts

Which medical imaging technique uses high frequency sound waves to visualise internal organs?

  • A MRI
  • B Ultrasound
  • C X-ray
  • D CT scan
Permalink
Correct Answer: Option B — Ultrasound
Explanation: Ultrasound imaging uses high frequency sound waves above 20000 Hz that reflect off internal organs to produce real-time images widely used in pregnancy monitoring and organ diagnosis.
Submitted by: PaperMCQs
12
Medium fpsc ppsc nts

Which everyday material acts as a natural antibacterial due to its low water activity and acidic pH?

  • A Yogurt
  • B Vinegar
  • C Lemon juice
  • D Honey
Permalink
Correct Answer: Option D — Honey
Explanation: Honey acts as a natural antibacterial because its low moisture content high sugar concentration and slightly acidic pH create conditions inhospitable to most bacterial growth.
Submitted by: PaperMCQs
13
Medium fpsc ppsc nts

Which type of energy is stored in chemical bonds of fuel and released during combustion?

  • A Kinetic energy
  • B Nuclear energy
  • C Chemical energy
  • D Thermal energy
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Correct Answer: Option C — Chemical energy
Explanation: Chemical energy stored in fuel molecule bonds is released as heat and light during combustion converting chemical potential energy into thermal and radiant energy.
Submitted by: PaperMCQs
14
Medium fpsc ppsc nts

Which everyday observation demonstrates Newton's Third Law of Motion?

  • A A ball rolling down a slope
  • B A rocket expelling gases downward and moving upward
  • C Water flowing downhill
  • D A book resting on a table
Permalink
Correct Answer: Option B — A rocket expelling gases downward and moving upward
Explanation: A rocket demonstrates Newton's Third Law as hot gases expelled downward produce an equal and opposite upward thrust propelling the rocket into space without needing air to push against.
Submitted by: PaperMCQs
15
Medium fpsc ppsc nts

Which household chemical should never be mixed with bleach as it produces toxic chloramine gas?

  • A Ammonia
  • B Vinegar
  • C Baking soda
  • D Salt
Permalink
Correct Answer: Option A — Ammonia
Explanation: Mixing ammonia with bleach produces toxic chloramine gas which can cause severe respiratory irritation and damage making it essential to never combine these common household cleaners.
Submitted by: PaperMCQs
16
Medium fpsc ppsc nts

Which gas is most responsible for the depletion of the ozone layer?

  • A Carbon dioxide
  • B Methane
  • C Nitrogen oxide
  • D Chlorofluorocarbons
Permalink
Correct Answer: Option D — Chlorofluorocarbons
Explanation: Chlorofluorocarbons CFCs released from aerosols refrigerants and industrial processes rise to the stratosphere and break down ozone molecules depleting the protective ozone layer.
Submitted by: PaperMCQs
17
Medium fpsc ppsc nts

Which scientific instrument is used to measure very small distances such as the diameter of a wire or thickness of a sheet?

  • A Ruler
  • B Barometer
  • C Ammeter
  • D Vernier calliper
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Correct Answer: Option D — Vernier calliper
Explanation: A Vernier calliper is a precision measuring instrument used to measure small distances such as the diameter of a wire or the thickness of a sheet with high accuracy.
Submitted by: PaperMCQs
18
Medium fpsc ppsc nts

Which layer at the back of the eye contains photoreceptor cells called rods and cones that detect light?

  • A Iris
  • B Retina
  • C Cornea
  • D Lens
Permalink
Correct Answer: Option B — Retina
Explanation: The retina is the light-sensitive layer at the back of the eye containing rod cells for detecting light intensity and cone cells for detecting colour in bright conditions.
Submitted by: PaperMCQs
19
Medium fpsc ppsc nts

Which part of the human eye is responsible for forming a sharp image by focusing light onto the retina?

  • A Cornea only
  • B Iris
  • C Retina
  • D Lens
Permalink
Correct Answer: Option D — Lens
Explanation: The lens of the eye focuses light onto the retina by changing its shape in a process called accommodation allowing the eye to focus on objects at varying distances.
Submitted by: PaperMCQs
20
Medium fpsc ppsc nts

Which term describes the process of a solid changing directly to a gas without passing through the liquid state?

  • A Sublimation
  • B Evaporation
  • C Condensation
  • D Melting
Permalink
Correct Answer: Option A — Sublimation
Explanation: Sublimation is the process where a solid changes directly to a gas without passing through the liquid state as seen with dry ice carbon dioxide transforming to vapour.
Submitted by: PaperMCQs
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