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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
21
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
22
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
23
Medium pms

What is the name of the process where a solid changes directly to gas?

  • A Condensation
  • B Sublimation
  • C Evaporation
  • D Deposition
Permalink
Correct Answer: Option B — Sublimation
Explanation: Sublimation occurs when a solid transitions directly to a gaseous state without passing through the liquid phase, as seen with dry ice (solid carbon dioxide). This process is used in freeze-drying food and pharmaceuticals.
Submitted by: PaperMCQs
24
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
25
Easy css

What is the primary function of white blood cells?

  • A Clotting blood
  • B Fighting infections
  • C Carrying oxygen
  • D Producing hormones
Permalink
Correct Answer: Option B — Fighting infections
Explanation: White blood cells defend the body against infections by identifying, attacking, and destroying harmful pathogens like bacteria and viruses. They are produced in bone marrow and circulate through the blood and lymphatic system continuously.
Submitted by: PaperMCQs
26
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
27
Easy nts

What is the term for organisms that make their own food using sunlight?

  • A Parasites
  • B Decomposers
  • C Heterotrophs
  • D Autotrophs
Permalink
Correct Answer: Option D — Autotrophs
Explanation: Autotrophs, such as plants and algae, produce their own food through photosynthesis, converting sunlight, water, and carbon dioxide into glucose. They form the base of most food chains, supporting nearly all other life forms.
Submitted by: PaperMCQs
28
Easy pms

Which natural phenomenon is measured using the Richter scale?

  • A Earthquakes
  • B Hurricanes
  • C Volcanic eruptions
  • D Tsunamis
Permalink
Correct Answer: Option A — Earthquakes
Explanation: The Richter scale measures the magnitude of earthquakes based on the energy released at the source. Developed by Charles Richter in 1935, each whole number increase represents roughly 32 times more energy released.
Submitted by: PaperMCQs
29
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
30
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
31
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
32
Medium nts

Which part of a plant cell is responsible for photosynthesis?

  • A Nucleus
  • B Vacuole
  • C Mitochondria
  • D Chloroplast
Permalink
Correct Answer: Option D — Chloroplast
Explanation: Chloroplasts contain chlorophyll, the green pigment that captures light energy for photosynthesis, converting carbon dioxide and water into glucose and oxygen. They are found in plant cells and some algae but not in animal cells.
Submitted by: PaperMCQs
33
Medium pms

What is the name of the theory that explains the origin of the universe?

  • A Quantum Theory
  • B String Theory
  • C Steady State Theory
  • D Big Bang Theory
Permalink
Correct Answer: Option D — Big Bang Theory
Explanation: The Big Bang Theory proposes that the universe began as an extremely hot, dense point approximately 13.8 billion years ago and has been expanding ever since. It is supported by evidence like cosmic microwave background radiation.
Submitted by: PaperMCQs
34
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
35
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
36
Medium nts

What is the primary source of energy for Earth's climate system?

  • A Wind
  • B The Sun
  • C Earth's core
  • D Ocean currents
Permalink
Correct Answer: Option B — The Sun
Explanation: The Sun is the primary source of energy driving Earth's climate system, providing the heat and light that fuel weather patterns, ocean currents, and the water cycle. Variations in solar radiation influence long-term climate trends.
Submitted by: PaperMCQs
37
Medium pms

Which instrument is used to measure humidity?

  • A Hygrometer
  • B Anemometer
  • C Thermometer
  • D Barometer
Permalink
Correct Answer: Option A — Hygrometer
Explanation: A hygrometer measures the amount of moisture or humidity present in the air. This information is crucial for weather forecasting, agriculture, and indoor climate control, as humidity affects comfort and the growth of mold.
Submitted by: PaperMCQs
38
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
39
Medium css

Which organ regulates blood sugar levels in the body?

  • A Spleen
  • B Liver
  • C Pancreas
  • D Kidney
Permalink
Correct Answer: Option C — Pancreas
Explanation: The pancreas regulates blood sugar by releasing insulin and glucagon, hormones that respectively lower and raise glucose levels in the bloodstream. This balance is crucial for providing consistent energy to the body's cells.
Submitted by: PaperMCQs
40
Easy nts

Which bird is known for its ability to mimic human speech?

  • A Eagle
  • B Sparrow
  • C Parrot
  • D Crow
Permalink
Correct Answer: Option C — Parrot
Explanation: Parrots are well known for their ability to mimic human speech and other sounds due to their highly developed vocal learning abilities. Species like the African Grey Parrot are particularly noted for their vocabulary and cognitive skills.
Submitted by: PaperMCQs
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