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

What is the term for the process by which the body maintains a stable internal environment?

  • A Digestion
  • B Homeostasis
  • C Metabolism
  • D Respiration
Permalink
Correct Answer: Option B — Homeostasis
Explanation: Homeostasis refers to the body's ability to maintain stable internal conditions, such as temperature and pH, despite external changes. This regulation involves feedback mechanisms coordinated by the nervous and endocrine systems to sustain optimal cellular function.
Submitted by: PaperMCQs
2
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
3
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
4
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
5
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
6
Medium css

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

  • A Omnivore
  • B Carnivore
  • C Herbivore
  • D Insectivore
Permalink
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
7
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
8
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
9
Medium pms

Which organ system includes the brain and spinal cord?

  • A Endocrine system
  • B Circulatory system
  • C Nervous system
  • D Respiratory system
Permalink
Correct Answer: Option C — Nervous system
Explanation: The nervous system, comprising the brain, spinal cord, and peripheral nerves, controls and coordinates body functions by transmitting electrical and chemical signals. It regulates everything from reflexes to complex thought processes and voluntary movement.
Submitted by: PaperMCQs
10
Easy ppsc

What is the primary component of bones and teeth?

  • A Magnesium sulfate
  • B Calcium phosphate
  • C Iron oxide
  • D Calcium carbonate
Permalink
Correct Answer: Option B — Calcium phosphate
Explanation: Bones and teeth are primarily composed of calcium phosphate in the form of hydroxyapatite crystals, providing strength and rigidity. This mineral structure allows bones to support body weight while remaining light enough for movement.
Submitted by: PaperMCQs
11
Medium css

Which scientist discovered the law of gravity?

  • A Johannes Kepler
  • B Galileo Galilei
  • C Albert Einstein
  • D Isaac Newton
Permalink
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.
Submitted by: PaperMCQs
12
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
13
Medium nts

Which gas do humans exhale during respiration?

  • A Hydrogen
  • B Oxygen
  • C Carbon dioxide
  • D Nitrogen
Permalink
Correct Answer: Option C — Carbon dioxide
Explanation: During respiration, humans exhale carbon dioxide, a waste product generated when cells break down glucose to produce energy. This exchange of oxygen intake and carbon dioxide release occurs continuously in the lungs' alveoli.
Submitted by: PaperMCQs
14
Medium pms

What is the primary function of the human liver?

  • A Detoxification
  • B Hormone storage
  • C Blood pumping
  • D Gas exchange
Permalink
Correct Answer: Option A — Detoxification
Explanation: The liver performs numerous vital functions including detoxifying harmful substances, producing bile for digestion, and storing glycogen for energy. It is one of the few organs capable of regenerating damaged tissue over time.
Submitted by: PaperMCQs
15
Medium ppsc

Which planet has the shortest day in the solar system?

  • A Saturn
  • B Jupiter
  • C Mars
  • D Venus
Permalink
Correct Answer: Option B — Jupiter
Explanation: Jupiter has the shortest day of any planet in the solar system, completing one rotation on its axis in just under 10 hours. Despite being the largest planet, its rapid spin causes a noticeable flattening at its poles.
Submitted by: PaperMCQs
16
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
17
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
18
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
19
Medium ppsc

What is the main function of the human skeleton?

  • A Digestion
  • B Support and protection
  • C Respiration
  • D Circulation
Permalink
Correct Answer: Option B — Support and protection
Explanation: The human skeleton provides structural support for the body, protects vital organs like the brain and heart, and serves as an attachment point for muscles enabling movement. It also stores minerals and produces blood cells in bone marrow.
Submitted by: PaperMCQs
20
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
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