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Everyday Science MCQs

45 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 css

Which continent is known as the driest inhabited continent on Earth?

  • A South America
  • B Africa
  • C Australia
  • D Asia
Permalink
Correct Answer: Option C — Australia
Explanation: Australia is recognized as the driest inhabited continent, with large portions covered by arid desert landscapes receiving minimal rainfall annually. Despite this, it supports significant biodiversity, including many species uniquely adapted to dry conditions.
Submitted by: PaperMCQs
2
Medium css

What is the term for an animal that eats both plants and meat?

  • A Omnivore
  • B Carnivore
  • C Herbivore
  • D Insectivore
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Correct Answer: Option A — Omnivore
Explanation: Omnivores consume both plant and animal matter, giving them dietary flexibility to survive in varied environments. Humans, bears, and pigs are common examples of omnivorous species with diverse nutritional requirements and feeding behaviors.
Submitted by: PaperMCQs
3
Medium css

Which scientist discovered the law of gravity?

  • A Johannes Kepler
  • B Galileo Galilei
  • C Albert Einstein
  • D Isaac Newton
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Correct Answer: Option D — Isaac Newton
Explanation: Isaac Newton formulated the law of universal gravitation in the 17th century, explaining how objects with mass attract one another. His work laid the foundation for classical mechanics and remained unchallenged until Einstein's theory of relativity.
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4
Hard css

What is the chemical process by which iron rusts?

  • A Oxidation
  • B Reduction
  • C Sublimation
  • D Fermentation
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Correct Answer: Option A — Oxidation
Explanation: Rusting is a chemical process called oxidation, where iron reacts with oxygen and moisture in the air to form iron oxide. This weakens the metal over time, which is why protective coatings like paint are often applied.
Submitted by: PaperMCQs
5
Medium css

Which element is essential for photosynthesis besides carbon dioxide and water?

  • A Sunlight
  • B Oxygen gas
  • C Nitrogen gas
  • D Argon
Permalink
Correct Answer: Option A — Sunlight
Explanation: Sunlight provides the energy required for photosynthesis, driving the chemical reaction that converts carbon dioxide and water into glucose and oxygen. Without adequate light, plants cannot efficiently produce the food they need to grow.
Submitted by: PaperMCQs
6
Easy css

What is the primary function of white blood cells?

  • A Clotting blood
  • B Fighting infections
  • C Carrying oxygen
  • D Producing hormones
Permalink
Correct Answer: Option B — Fighting infections
Explanation: White blood cells defend the body against infections by identifying, attacking, and destroying harmful pathogens like bacteria and viruses. They are produced in bone marrow and circulate through the blood and lymphatic system continuously.
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7
Hard css

Which hormone is responsible for the fight-or-flight response?

  • A Thyroxine
  • B Estrogen
  • C Adrenaline
  • D Insulin
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Correct Answer: Option C — Adrenaline
Explanation: Adrenaline, also known as epinephrine, is released by the adrenal glands during stressful or dangerous situations, triggering the fight-or-flight response. It increases heart rate, blood pressure, and energy supplies to prepare the body for action.
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8
Medium css

Which organ regulates blood sugar levels in the body?

  • A Spleen
  • B Liver
  • C Pancreas
  • D Kidney
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Correct Answer: Option C — Pancreas
Explanation: The pancreas regulates blood sugar by releasing insulin and glucagon, hormones that respectively lower and raise glucose levels in the bloodstream. This balance is crucial for providing consistent energy to the body's cells.
Submitted by: PaperMCQs
9
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
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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.
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10
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.
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11
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
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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.
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12
Easy css

What is the freezing point of water in Celsius?

  • A -10°C
  • B 5°C
  • C 10°C
  • D 0°C
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Correct Answer: Option D — 0°C
Explanation: Water freezes at 0°C (32°F) under standard atmospheric pressure, transitioning from liquid to solid state as ice. This temperature can shift slightly with impurities or pressure changes, a principle used in antifreeze solutions.
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13
Easy css

Which scientist proposed the theory of relativity?

  • A Niels Bohr
  • B Galileo Galilei
  • C Isaac Newton
  • D Albert Einstein
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Correct Answer: Option D — Albert Einstein
Explanation: Albert Einstein developed the theory of relativity in the early 20th century, revolutionizing our understanding of space, time, and gravity. His famous equation E=mc² established the relationship between mass and energy.
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14
Medium css

What is the powerhouse of the cell called?

  • A Mitochondria
  • B Nucleus
  • C Ribosome
  • D Golgi body
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Correct Answer: Option A — Mitochondria
Explanation: Mitochondria generate ATP, the energy currency of cells, through cellular respiration, earning them the nickname 'powerhouse of the cell'. They have their own DNA and are believed to have originated from ancient bacteria.
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15
Easy css

Which part of the human body produces insulin?

  • A Kidney
  • B Spleen
  • C Liver
  • D Pancreas
Permalink
Correct Answer: Option D — Pancreas
Explanation: The pancreas produces insulin, a hormone that regulates blood sugar levels by allowing cells to absorb glucose. Insufficient insulin production leads to diabetes mellitus, a common chronic disease affecting glucose metabolism worldwide.
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16
Hard css fpsc

Which radiation type is emitted during beta decay converting a neutron into a proton?

  • A Alpha radiation
  • B Beta radiation
  • C Gamma radiation
  • D Neutron radiation
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Correct Answer: Option B — Beta radiation
Explanation: Beta radiation is emitted during beta decay when a neutron in the nucleus converts into a proton releasing a high energy electron or beta particle and an antineutrino.
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17
Hard css fpsc

Which kidney process selectively returns useful substances like glucose back to the bloodstream?

  • A Ultrafiltration
  • B Secretion
  • C Selective reabsorption
  • D Excretion
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Correct Answer: Option C — Selective reabsorption
Explanation: Selective reabsorption occurs in the kidney tubules where useful substances including glucose amino acids water and ions are actively or passively returned to the bloodstream.
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18
Hard css fpsc

Which vitamin deficiency causes pellagra characterised by dermatitis diarrhoea and dementia?

  • A Vitamin B1
  • B Vitamin B6
  • C Vitamin B3 Niacin
  • D Vitamin B12
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Correct Answer: Option C — Vitamin B3 Niacin
Explanation: Pellagra is caused by a deficiency of Vitamin B3 or Niacin and is characterised by the classic four Ds dermatitis diarrhoea dementia and if untreated death.
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19
Hard css fpsc ppsc

Which famous experiment proved that the Earth orbits the Sun rather than the Sun orbiting the Earth?

  • A Galileo's telescope observations
  • B Newton's apple experiment
  • C Foucault pendulum demonstration
  • D Copernicus's naked eye observations
Permalink
Correct Answer: Option A — Galileo's telescope observations
Explanation: Galileo's telescope observations in 1610 of Jupiter's moons and Venus's phases provided key evidence supporting the heliocentric model that Earth orbits the Sun.
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20
Hard css fpsc

Which phenomenon explains why sound travels faster in warm air than in cold air?

  • A Warm air molecules have less energy
  • B Warm air molecules move faster providing quicker transmission
  • C Cold air is denser blocking sound
  • D Sound speed is unaffected by temperature
Permalink
Correct Answer: Option B — Warm air molecules move faster providing quicker transmission
Explanation: In warmer air molecules have more kinetic energy and move faster which allows sound waves to be transmitted more quickly giving sound a higher speed in warm compared to cold air.
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