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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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61
Easy css

What is the freezing point of water in Celsius?

  • A -10°C
  • B 5°C
  • C 10°C
  • D 0°C
Permalink
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.
Submitted by: PaperMCQs
62
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
63
Medium nts

What is the term for animals that are active at night?

  • A Crepuscular
  • B Diurnal
  • C Hibernating
  • D Nocturnal
Permalink
Correct Answer: Option D — Nocturnal
Explanation: Nocturnal animals, such as owls and bats, are active during the night and rest during the day. This behavior helps them avoid predators, extreme daytime temperatures, or competition for food with diurnal species.
Submitted by: PaperMCQs
64
Medium pms

Which mineral is essential for strong bones and teeth?

  • A Calcium
  • B Magnesium
  • C Sodium
  • D Potassium
Permalink
Correct Answer: Option A — Calcium
Explanation: Calcium is vital for building and maintaining strong bones and teeth, and also plays a role in muscle function and nerve signaling. Dairy products, leafy greens, and fortified foods are common dietary sources of calcium.
Submitted by: PaperMCQs
65
Medium ppsc

What is the smallest unit of life?

  • A Organ
  • B Cell
  • C Atom
  • D Tissue
Permalink
Correct Answer: Option B — Cell
Explanation: The cell is the basic structural and functional unit of all living organisms, capable of carrying out life processes independently. Cells can be prokaryotic, like bacteria, or eukaryotic, like those found in plants and animals.
Submitted by: PaperMCQs
66
Easy css

Which scientist proposed the theory of relativity?

  • A Niels Bohr
  • B Galileo Galilei
  • C Isaac Newton
  • D Albert Einstein
Permalink
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.
Submitted by: PaperMCQs
67
Hard fpsc

What is the main gas responsible for the ozone layer?

  • A Methane
  • B Carbon dioxide
  • C Ozone
  • D Oxygen
Permalink
Correct Answer: Option C — Ozone
Explanation: The ozone layer, composed of ozone molecules (O3), absorbs most of the sun's harmful ultraviolet radiation, protecting life on Earth. It is located in the stratosphere, roughly 15 to 35 kilometers above the surface.
Submitted by: PaperMCQs
68
Easy nts

Which part of the brain controls balance and coordination?

  • A Cerebrum
  • B Medulla
  • C Hypothalamus
  • D Cerebellum
Permalink
Correct Answer: Option D — Cerebellum
Explanation: The cerebellum, located at the back of the brain, coordinates voluntary movements, posture, and balance. Damage to this region can result in difficulty walking, poor coordination, and tremors, a condition known as ataxia.
Submitted by: PaperMCQs
69
Hard pms

What is the process by which liquid changes to gas called?

  • A Sublimation
  • B Evaporation
  • C Precipitation
  • D Condensation
Permalink
Correct Answer: Option B — Evaporation
Explanation: Evaporation is the process where liquid molecules gain enough energy to escape into the gaseous state, typically occurring at the surface of a liquid below its boiling point. It plays a key role in the water cycle.
Submitted by: PaperMCQs
70
Hard ppsc

Which disease is caused by a deficiency of iodine?

  • A Goiter
  • B Rickets
  • C Scurvy
  • D Anemia
Permalink
Correct Answer: Option A — Goiter
Explanation: Iodine deficiency causes goiter, an enlargement of the thyroid gland as it struggles to produce enough thyroid hormone. Iodized salt programs have significantly reduced goiter prevalence worldwide, especially in developing countries.
Submitted by: PaperMCQs
71
Medium css

What is the powerhouse of the cell called?

  • A Mitochondria
  • B Nucleus
  • C Ribosome
  • D Golgi body
Permalink
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.
Submitted by: PaperMCQs
72
Easy fpsc

Which gas is commonly used in balloons to make them float?

  • A Helium
  • B Nitrogen
  • C Oxygen
  • D Hydrogen
Permalink
Correct Answer: Option A — Helium
Explanation: Helium is used in balloons because it is lighter than air and non-flammable, unlike hydrogen which poses fire risks. Helium is an inert noble gas widely used in party balloons, airships, and scientific research applications.
Submitted by: PaperMCQs
73
Hard nts

What type of lens is used to correct nearsightedness (myopia)?

  • A Bifocal lens
  • B Concave lens
  • C Convex lens
  • D Cylindrical lens
Permalink
Correct Answer: Option B — Concave lens
Explanation: Concave lenses diverge light rays before they enter the eye, helping to correctly focus images on the retina for nearsighted individuals. Myopia occurs when the eyeball is too long or the cornea too curved.
Submitted by: PaperMCQs
74
Easy ppsc

What is the study of heredity called?

  • A Ecology
  • B Genetics
  • C Physiology
  • D Anatomy
Permalink
Correct Answer: Option B — Genetics
Explanation: Genetics is the branch of biology concerned with how traits are passed from parents to offspring through genes. Gregor Mendel is regarded as the father of genetics for his pioneering work on pea plant inheritance patterns.
Submitted by: PaperMCQs
75
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
76
Medium nts

Which human organ is primarily responsible for producing bile?

  • A Liver
  • B Gallbladder
  • C Stomach
  • D Pancreas
Permalink
Correct Answer: Option A — Liver
Explanation: The liver produces bile, a fluid that aids in the digestion and absorption of fats in the small intestine. Bile is stored and concentrated in the gallbladder before being released during digestion of fatty foods.
Submitted by: PaperMCQs
77
Easy pms

What is the unit used to measure atmospheric pressure?

  • A Watt
  • B Pascal
  • C Newton
  • D Joule
Permalink
Correct Answer: Option B — Pascal
Explanation: Atmospheric pressure is measured in Pascals (Pa), named after French scientist Blaise Pascal. Meteorologists often use hectopascals or millibars, with standard atmospheric pressure at sea level being approximately 1013.25 hectopascals.
Submitted by: PaperMCQs
78
Medium ppsc

What is the hardest natural substance found on Earth?

  • A Diamond
  • B Quartz
  • C Granite
  • D Iron
Permalink
Correct Answer: Option A — Diamond
Explanation: Diamond is the hardest known natural material, composed of carbon atoms arranged in a crystal lattice structure. Its hardness is measured as 10 on the Mohs scale, making it valuable for both jewelry and industrial cutting tools.
Submitted by: PaperMCQs
79
Medium nts

What is the boiling point of water at sea level in Celsius?

  • A 90°C
  • B 80°C
  • C 100°C
  • D 110°C
Permalink
Correct Answer: Option C — 100°C
Explanation: Water boils at 100°C (212°F) at standard atmospheric pressure at sea level. The boiling point decreases at higher altitudes due to lower atmospheric pressure, which is why cooking takes longer in mountainous regions.
Submitted by: PaperMCQs
80
Hard pms

Which gas do plants absorb from the atmosphere for photosynthesis?

  • A Nitrogen
  • B Carbon dioxide
  • C Hydrogen
  • D Oxygen
Permalink
Correct Answer: Option B — Carbon dioxide
Explanation: Plants absorb carbon dioxide through tiny pores called stomata and use it, along with sunlight and water, to produce glucose and oxygen during photosynthesis. This process is vital for maintaining atmospheric oxygen levels.
Submitted by: PaperMCQs
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