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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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41
Hard pms

What is the term for a substance that speeds up a chemical reaction?

  • A Reactant
  • B Solvent
  • C Catalyst
  • D Inhibitor
Permalink
Correct Answer: Option C — Catalyst
Explanation: A catalyst increases the rate of a chemical reaction without being consumed in the process. Enzymes act as biological catalysts, speeding up metabolic reactions essential for life at much lower temperatures than would otherwise be needed.
Submitted by: PaperMCQs
42
Medium ppsc

Which part of the digestive system absorbs most nutrients?

  • A Small intestine
  • B Stomach
  • C Large intestine
  • D Esophagus
Permalink
Correct Answer: Option A — Small intestine
Explanation: The small intestine is responsible for absorbing most nutrients from digested food, aided by finger-like projections called villi that increase surface area. Its length, roughly 6 meters, allows thorough nutrient absorption before waste passes to the large intestine.
Submitted by: PaperMCQs
43
Medium css

What causes tides in the ocean?

  • A Earth's rotation alone
  • B Wind patterns
  • C Ocean currents
  • D Gravitational pull of the moon
Permalink
Correct Answer: Option D — Gravitational pull of the moon
Explanation: Tides are primarily caused by the gravitational pull of the moon on Earth's oceans, creating bulges of water on the sides facing toward and away from the moon. The sun's gravity also contributes to a lesser extent.
Submitted by: PaperMCQs
44
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
45
Medium nts

What is the chemical formula for table salt?

  • A CaCl2
  • B KCl
  • C NaCl
  • D MgCl2
Permalink
Correct Answer: Option C — NaCl
Explanation: Table salt's chemical formula is NaCl, composed of sodium and chlorine ions bonded together in a crystal lattice. It is essential for maintaining fluid balance and nerve function in the human body when consumed in moderation.
Submitted by: PaperMCQs
46
Medium pms

Which sense organ is responsible for detecting sound?

  • A Nose
  • B Tongue
  • C Eye
  • D Ear
Permalink
Correct Answer: Option D — Ear
Explanation: The ear detects sound waves and converts them into nerve signals interpreted by the brain. It also plays a crucial role in maintaining balance through the vestibular system located in the inner ear.
Submitted by: PaperMCQs
47
Easy ppsc

What is the process of cell division called?

  • A Fertilization
  • B Osmosis
  • C Mitosis
  • D Meiosis
Permalink
Correct Answer: Option C — Mitosis
Explanation: Mitosis is the process by which a single cell divides into two genetically identical daughter cells, essential for growth and tissue repair in organisms. It differs from meiosis, which produces reproductive cells with half the chromosome number.
Submitted by: PaperMCQs
48
Hard fpsc

What is the term for animals without a backbone?

  • A Invertebrates
  • B Vertebrates
  • C Mammals
  • D Amphibians
Permalink
Correct Answer: Option A — Invertebrates
Explanation: Invertebrates are animals lacking a vertebral column or backbone, comprising over 95% of all animal species. Examples include insects, mollusks, and worms, showing remarkable diversity in form and habitat across the planet.
Submitted by: PaperMCQs
49
Hard nts

Which acid is found in the human stomach?

  • A Acetic acid
  • B Hydrochloric acid
  • C Citric acid
  • D Sulfuric acid
Permalink
Correct Answer: Option B — Hydrochloric acid
Explanation: The stomach produces hydrochloric acid to break down food and kill harmful bacteria ingested with meals. It also activates digestive enzymes like pepsin, which begin the breakdown of proteins into smaller peptide chains.
Submitted by: PaperMCQs
50
Easy pms

What is the primary function of the respiratory system?

  • A Digestion
  • B Circulation
  • C Gas exchange
  • D Excretion
Permalink
Correct Answer: Option C — Gas exchange
Explanation: The respiratory system's primary function is gas exchange, taking in oxygen and expelling carbon dioxide through the lungs. This process supplies oxygen to the bloodstream for cellular respiration and removes waste gases from the body.
Submitted by: PaperMCQs
51
Easy ppsc

Which planet has the most moons in our solar system?

  • A Mars
  • B Neptune
  • C Saturn
  • D Jupiter
Permalink
Correct Answer: Option C — Saturn
Explanation: Saturn currently holds the record for the most known moons in our solar system, with over 140 confirmed satellites. These range from tiny moonlets to Titan, which is larger than the planet Mercury.
Submitted by: PaperMCQs
52
Medium css

What is the name of the process by which plants lose water through their leaves?

  • A Transpiration
  • B Osmosis
  • C Respiration
  • D Photosynthesis
Permalink
Correct Answer: Option A — Transpiration
Explanation: Transpiration is the process by which water evaporates from plant leaves through tiny pores called stomata. It helps plants absorb nutrients from soil, regulate temperature, and maintain the flow of water throughout their structure.
Submitted by: PaperMCQs
53
Easy fpsc

Which type of energy is stored in food?

  • A Thermal energy
  • B Electrical energy
  • C Kinetic energy
  • D Chemical energy
Permalink
Correct Answer: Option D — Chemical energy
Explanation: Food stores chemical energy in the bonds of molecules like carbohydrates and fats. When digested, this energy is released and converted by cells into ATP, which powers biological processes throughout the body.
Submitted by: PaperMCQs
54
Medium pms

Which vitamin is essential for good vision?

  • A Vitamin A
  • B Vitamin B12
  • C Vitamin D
  • D Vitamin C
Permalink
Correct Answer: Option A — Vitamin A
Explanation: Vitamin A is crucial for maintaining healthy vision, particularly for seeing in low light conditions, as it forms a component of the light-sensitive pigment rhodopsin in the retina. Deficiency can lead to night blindness.
Submitted by: PaperMCQs
55
Hard ppsc

What is the term for the study of weather patterns?

  • A Meteorology
  • B Geology
  • C Oceanography
  • D Astronomy
Permalink
Correct Answer: Option A — Meteorology
Explanation: Meteorology is the scientific study of the atmosphere, focusing on weather processes and forecasting. Meteorologists use satellites, radar, and computer models to predict phenomena such as storms, rainfall, and temperature changes.
Submitted by: PaperMCQs
56
Hard css

Which gas makes up the majority of the human body by weight in terms of elements?

  • A Nitrogen
  • B Oxygen
  • C Carbon
  • D Hydrogen
Permalink
Correct Answer: Option B — Oxygen
Explanation: Oxygen constitutes about 65% of the human body by mass, primarily as part of water molecules and organic compounds. It is essential for cellular respiration, the process cells use to generate energy from nutrients.
Submitted by: PaperMCQs
57
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
58
Medium nts

Which part of the plant conducts photosynthesis?

  • A Flowers
  • B Stem
  • C Leaves
  • D Roots
Permalink
Correct Answer: Option C — Leaves
Explanation: Leaves contain chlorophyll-filled chloroplasts that capture sunlight to convert carbon dioxide and water into glucose and oxygen. Their broad, flat shape maximizes surface area for absorbing sunlight during photosynthesis.
Submitted by: PaperMCQs
59
Easy pms

What is the study of fungi called?

  • A Mycology
  • B Botany
  • C Entomology
  • D Zoology
Permalink
Correct Answer: Option A — Mycology
Explanation: Mycology is the scientific study of fungi, including their genetic and biochemical properties, taxonomy, and use to humans in food, medicine, and industry. Fungi include yeasts, molds, and mushrooms, playing key ecological roles.
Submitted by: PaperMCQs
60
Easy ppsc

Which vitamin helps in blood clotting?

  • A Vitamin B6
  • B Vitamin E
  • C Vitamin K
  • D Vitamin A
Permalink
Correct Answer: Option C — Vitamin K
Explanation: Vitamin K is essential for synthesizing proteins required for blood clotting, preventing excessive bleeding after injury. It is found in leafy green vegetables and is also produced by bacteria in the human gut.
Submitted by: PaperMCQs
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