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Everyday Science MCQs

300 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
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
3
Easy fpsc

What is the term for water vapor turning into liquid water?

  • A Precipitation
  • B Sublimation
  • C Evaporation
  • D Condensation
Permalink
Correct Answer: Option D — Condensation
Explanation: Condensation occurs when water vapor cools and transforms back into liquid water droplets, commonly seen as dew or fog formation. It is a key stage in the water cycle, contributing to cloud formation and eventual precipitation.
Submitted by: PaperMCQs
4
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
5
Easy fpsc

What is the study of the stars and celestial objects called?

  • A Cosmology
  • B Geology
  • C Astrology
  • D Astronomy
Permalink
Correct Answer: Option D — Astronomy
Explanation: Astronomy is the scientific study of celestial objects, including stars, planets, galaxies, and phenomena occurring outside Earth's atmosphere. It differs from astrology, which is not a science but a belief system regarding celestial influence on human affairs.
Submitted by: PaperMCQs
6
Easy fpsc

Which layer of the Earth is primarily composed of molten rock?

  • A Crust
  • B Mantle
  • C Inner core
  • D Outer core
Permalink
Correct Answer: Option B — Mantle
Explanation: The mantle, located beneath Earth's crust, consists largely of semi-molten rock called magma that flows slowly over geological time. This movement drives plate tectonics, contributing to earthquakes, volcanic activity, and continental drift.
Submitted by: PaperMCQs
7
Easy fpsc

What is the main cause of earthquakes?

  • A Volcanic eruptions only
  • B Ocean tides
  • C Wind erosion
  • D Movement of tectonic plates
Permalink
Correct Answer: Option D — Movement of tectonic plates
Explanation: Earthquakes primarily result from the sudden release of energy caused by the movement of tectonic plates along fault lines. This releases seismic waves that shake the Earth's surface, sometimes causing significant structural damage.
Submitted by: PaperMCQs
8
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
9
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
10
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
11
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
12
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
13
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
14
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
15
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
16
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
17
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
18
Easy fpsc

What is the normal body temperature of a healthy human in Fahrenheit?

  • A 100.4°F
  • B 98.6°F
  • C 97.0°F
  • D 96.4°F
Permalink
Correct Answer: Option B — 98.6°F
Explanation: The average normal human body temperature is 98.6°F (37°C). It can vary slightly by individual, time of day, and activity level. A temperature above 100.4°F is generally considered a fever requiring medical attention.
Submitted by: PaperMCQs
19
Easy fpsc ppsc nts

Which gas causes the fizzing and bubbling when a carbonated drink bottle is opened?

  • A Oxygen
  • B Nitrogen
  • C Methane
  • D Carbon dioxide
Permalink
Correct Answer: Option D — Carbon dioxide
Explanation: Carbon dioxide dissolved under pressure in carbonated drinks rapidly escapes as gas forming bubbles when the bottle is opened and pressure drops allowing the gas to come out of solution.
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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