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Everyday Science MCQs

303 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
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
3
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
4
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
5
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
6
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
7
Easy ppsc

What type of blood cells help the body fight infections?

  • A White blood cells
  • B Platelets
  • C Plasma cells
  • D Red blood cells
Permalink
Correct Answer: Option A — White blood cells
Explanation: White blood cells, or leukocytes, are a key part of the immune system, identifying and destroying pathogens like bacteria, viruses, and fungi. They circulate through the bloodstream and lymphatic system to defend the body from disease.
Submitted by: PaperMCQs
8
Medium ppsc

Which vitamin is synthesized by bacteria in the human intestine?

  • A Vitamin A
  • B Vitamin D
  • C Vitamin K
  • D Vitamin C
Permalink
Correct Answer: Option C — Vitamin K
Explanation: Gut bacteria in the human intestine synthesize Vitamin K, which is essential for proper blood clotting. This is one reason antibiotics, which can disrupt gut flora, may sometimes affect a person's clotting ability.
Submitted by: PaperMCQs
9
Easy ppsc

What is the term for the loss of biodiversity in an ecosystem?

  • A Migration
  • B Adaptation
  • C Extinction
  • D Evolution
Permalink
Correct Answer: Option C — Extinction
Explanation: Extinction refers to the complete disappearance of a species from Earth, often resulting from habitat loss, climate change, or human activity. Mass extinctions have occurred throughout Earth's history, dramatically reshaping biodiversity patterns.
Submitted by: PaperMCQs
10
Medium ppsc

Which part of the digestive system absorbs most nutrients?

  • A Small intestine
  • B Stomach
  • C Large intestine
  • D Esophagus
Permalink
Correct Answer: Option A — Small intestine
Explanation: The small intestine is responsible for absorbing most nutrients from digested food, aided by finger-like projections called villi that increase surface area. Its length, roughly 6 meters, allows thorough nutrient absorption before waste passes to the large intestine.
Submitted by: PaperMCQs
11
Easy ppsc

What is the process of cell division called?

  • A Fertilization
  • B Osmosis
  • C Mitosis
  • D Meiosis
Permalink
Correct Answer: Option C — Mitosis
Explanation: Mitosis is the process by which a single cell divides into two genetically identical daughter cells, essential for growth and tissue repair in organisms. It differs from meiosis, which produces reproductive cells with half the chromosome number.
Submitted by: PaperMCQs
12
Easy ppsc

Which planet has the most moons in our solar system?

  • A Mars
  • B Neptune
  • C Saturn
  • D Jupiter
Permalink
Correct Answer: Option C — Saturn
Explanation: Saturn currently holds the record for the most known moons in our solar system, with over 140 confirmed satellites. These range from tiny moonlets to Titan, which is larger than the planet Mercury.
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
Easy ppsc

Which vitamin helps in blood clotting?

  • A Vitamin B6
  • B Vitamin E
  • C Vitamin K
  • D Vitamin A
Permalink
Correct Answer: Option C — Vitamin K
Explanation: Vitamin K is essential for synthesizing proteins required for blood clotting, preventing excessive bleeding after injury. It is found in leafy green vegetables and is also produced by bacteria in the human gut.
Submitted by: PaperMCQs
15
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
16
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
17
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
18
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
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
Medium fpsc ppsc nts

Which device converts sound waves into electrical signals for recording or amplification?

  • A Microphone
  • B Loudspeaker
  • C Capacitor
  • D Battery
Permalink
Correct Answer: Option A — Microphone
Explanation: A microphone uses a diaphragm that vibrates with incoming sound waves and converts those mechanical vibrations into electrical signals through electromagnetic or capacitive transduction.
Submitted by: PaperMCQs
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