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Everyday Science MCQs

61 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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Filter: All Exams css pms fpsc ppsc nts | All Easy Medium Hard
1
Hard fpsc

What is the main function of platelets in blood?

  • A Producing antibodies
  • B Fighting infection
  • C Carrying oxygen
  • D Blood clotting
Permalink
Correct Answer: Option D — Blood clotting
Explanation: Platelets are small cell fragments that gather at the site of a blood vessel injury, clumping together to form clots that stop bleeding. This process, called coagulation, is essential for wound healing and preventing excessive blood loss.
Submitted by: PaperMCQs
2
Hard pms

What is the name of Earth's only natural satellite?

  • A Phobos
  • B Titan
  • C Europa
  • D The Moon
Permalink
Correct Answer: Option D — The Moon
Explanation: The Moon is Earth's only natural satellite, orbiting our planet approximately every 27.3 days. It influences ocean tides through gravitational pull and has been a subject of extensive scientific study and human exploration since the 1960s.
Submitted by: PaperMCQs
3
Hard ppsc

Which vitamin is important for wound healing?

  • A Vitamin D
  • B Vitamin B12
  • C Vitamin E
  • D Vitamin C
Permalink
Correct Answer: Option D — Vitamin C
Explanation: Vitamin C plays a crucial role in wound healing by supporting collagen synthesis, a protein essential for skin, blood vessels, and connective tissue repair. It also has antioxidant properties that help protect cells from damage.
Submitted by: PaperMCQs
4
Hard nts

What causes the phases of the moon?

  • A Moon's rotation alone
  • B Moon's position relative to Earth and Sun
  • C Earth's shadow
  • D Solar eclipses
Permalink
Correct Answer: Option B — Moon's position relative to Earth and Sun
Explanation: The phases of the moon result from changing angles between the Earth, moon, and sun, which affect how much of the moon's sunlit side is visible from Earth. This cycle repeats approximately every 29.5 days.
Submitted by: PaperMCQs
5
Hard css

What is the chemical process by which iron rusts?

  • A Oxidation
  • B Reduction
  • C Sublimation
  • D Fermentation
Permalink
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
6
Hard pms

Which type of rock is formed from cooled magma or lava?

  • A Igneous rock
  • B Metamorphic rock
  • C Sedimentary rock
  • D Limestone
Permalink
Correct Answer: Option A — Igneous rock
Explanation: Igneous rocks form when molten magma or lava cools and solidifies, either underground or on the Earth's surface. Examples include granite, formed slowly underground, and basalt, formed quickly from lava at the surface.
Submitted by: PaperMCQs
7
Hard nts

Which vitamin deficiency leads to beriberi?

  • A Vitamin B9
  • B Vitamin B1 (Thiamine)
  • C Vitamin B6
  • D Vitamin B2
Permalink
Correct Answer: Option B — Vitamin B1 (Thiamine)
Explanation: Beriberi is caused by a deficiency of Vitamin B1, or thiamine, which is essential for converting carbohydrates into energy. It affects the nervous and cardiovascular systems and was historically common among populations relying heavily on polished rice.
Submitted by: PaperMCQs
8
Hard ppsc

Which gas is released by volcanoes in large quantities?

  • A Oxygen
  • B Sulfur dioxide
  • C Nitrogen
  • D Helium
Permalink
Correct Answer: Option B — Sulfur dioxide
Explanation: Volcanic eruptions release large quantities of sulfur dioxide along with water vapor and carbon dioxide. Sulfur dioxide can form aerosols in the atmosphere that reflect sunlight, temporarily cooling the Earth's climate after major eruptions.
Submitted by: PaperMCQs
9
Hard css

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

  • A Thyroxine
  • B Estrogen
  • C Adrenaline
  • D Insulin
Permalink
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.
Submitted by: PaperMCQs
10
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
11
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
12
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
13
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
14
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
15
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
16
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
17
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
18
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
19
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
20
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
Permalink
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.
Submitted by: PaperMCQs
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