100 Everyday Science MCQs with Answers

A General Knowledge Practice Set for 2026

Science is everywhere: in the air above your tea, the electricity behind your fan, the vitamin in an orange, and the planet you keep calling "the bright one." This set turns those everyday facts into 100 clean MCQs for quick general-knowledge practice - no mini-lectures hiding under the answers.

Why this Everyday Science set is useful

If you are building a daily MCQ practice routine, this 100-question set gives you a focused block of science without sending you on a browser safari. For deeper topic-wise work, move between the Everyday Science MCQs category and the broader General Knowledge MCQs collection. The existing Everyday Science topics guide is useful when a concept needs context, while the online MCQ practice guide explains why active recall usually beats passive scrolling.

The problem with many MCQ websites in Pakistan is not a shortage of questions; it is finding a clean path through them. A learner can pair science revision with Pakistan Studies MCQs,English MCQs,Current Affairs MCQs and Islamic Studies MCQs without turning one study session into twelve open tabs and a small identity crisis.

For exam-focused learners, the same questions can sit inside a wider MCQs preparation strategy. Use the NTS preparation guide when your test includes mixed sections, the CSS exam-pattern guide for federal competitive-exam context, and the past-paper strategy guide when you want to connect factual recall with real paper patterns. The time-management guide is also worth keeping nearby once you start timing yourself.

McqsBase works best as a consistent MCQ website rather than something you visit only the night before an exam with heroic optimism. Its practice-test guide shows how repeated testing can expose weak areas, the free-resources guide helps keep preparation affordable, and the platform comparison guide is useful if you are deciding which MCQ site should become your main study hub.

If you prefer a more digital workflow, the future of exam preparation guide looks at where online learning is heading, while the McqsBase platform overview explains the site's category-first approach. You can also compare free MCQ resources, return to the main MCQsBase blog, or simply open the Everyday Science practice page and start answering. Fancy strategy is useful; clicking "start" remains suspiciously effective.

What the 100 questions cover

Section	Questions	Focus
Human Body & Health	1-20	Organs, blood, vitamins, digestion, senses
Plants, Cells & Life Science	21-40	Photosynthesis, transport tissues, cells, reproduction
Physics & Measurement	41-60	SI units, light, sound, electricity, instruments
Chemistry in Everyday Life	61-80	Symbols, formulas, pH, fuels, acids, common compounds
Earth, Environment & Space	81-100	Atmosphere, Earth layers, water cycle, energy, planets

1-20. Human Body & Health
Choose one answer, then check the answer column. No explanations - exactly as requested.

No.	Question & Options	Answer
1	How many bones are normally present in the adult human skeleton? A) 196 B) 206 C) 216 D) 226	B) 206
2	How many chambers does the human heart have? A) Two B) Three C) Four D) Five	C) Four
3	Which organ pumps blood around the human body? A) Liver B) Heart C) Kidney D) Lung	B) Heart
4	Which is the largest organ of the human body? A) Liver B) Skin C) Brain D) Lung	B) Skin
5	Which organs filter wastes and extra water from the blood to make urine? A) Lungs B) Kidneys C) Pancreas D) Intestines	B) Kidneys
6	Which organ contains cells that produce the hormone insulin? A) Pancreas B) Liver C) Spleen D) Gallbladder	A) Pancreas
7	Which gas is carried from the lungs to body tissues mainly by red blood cells? A) Nitrogen B) Oxygen C) Helium D) Neon	B) Oxygen
8	Which blood cells play a major role in defending the body against infection? A) Red blood cells B) White blood cells C) Platelets D) Plasma only	B) White blood cells
9	Which organs are primarily responsible for gas exchange in humans? A) Kidneys B) Lungs C) Liver D) Stomach	B) Lungs
10	Which part of the brain is especially important for balance and coordination? A) Cerebellum B) Medulla C) Hypothalamus D) Pituitary gland	A) Cerebellum
11	A severe deficiency of vitamin C can cause which disease? A) Rickets B) Scurvy C) Beriberi D) Goiter	B) Scurvy
12	Vitamin D deficiency in children can lead to which condition? A) Scurvy B) Rickets C) Night blindness D) Pellagra	B) Rickets
13	Deficiency of vitamin A most directly affects which ability? A) Low-light vision B) Hearing C) Blood clotting D) Smell	A) Low-light vision
14	Which mineral is a key component of hemoglobin? A) Iodine B) Iron C) Sodium D) Potassium	B) Iron
15	Which blood component is most directly involved in clot formation? A) Platelets B) Red blood cells C) Plasma water D) Neurons	A) Platelets
16	Which transparent front part of the eye is commonly transplanted in corneal transplantation? A) Retina B) Cornea C) Iris D) Optic nerve	B) Cornea
17	Which structure gives the human eye most of its visible color? A) Lens B) Iris C) Retina D) Cornea	B) Iris
18	Where does most nutrient absorption occur in the digestive system? A) Stomach B) Small intestine C) Large intestine D) Esophagus	B) Small intestine
19	Which enzyme begins protein digestion in the stomach? A) Amylase B) Pepsin C) Lipase only in mouth D) Maltase	B) Pepsin
20	What is the smallest bone in the human body? A) Stapes B) Femur C) Radius D) Patella	A) Stapes

Figure 1. Everyday Science practice overview: human-body and general science learning.

21-40. Plants, Cells & Life Science
Choose one answer, then check the answer column. No explanations - exactly as requested.

No.	Question & Options	Answer
21	Which green pigment captures light energy for photosynthesis? A) Hemoglobin B) Chlorophyll C) Melanin D) Keratin	B) Chlorophyll
22	Which gas do green plants take in during photosynthesis? A) Oxygen B) Carbon dioxide C) Nitrogen D) Hydrogen	B) Carbon dioxide
23	Which gas is released as a product of photosynthesis? A) Oxygen B) Nitrogen C) Methane D) Helium	A) Oxygen
24	Which part of a typical plant absorbs most water and mineral ions from soil? A) Flower B) Root C) Fruit D) Seed coat	B) Root
25	Which plant tissue mainly transports water upward from the roots? A) Phloem B) Xylem C) Epidermis D) Cork	B) Xylem
26	Which plant tissue transports sugars and other organic nutrients? A) Xylem B) Phloem C) Cambium only D) Cuticle	B) Phloem
27	Tiny pores called stomata are mainly involved in which process? A) Gas exchange B) Seed storage C) Root anchorage D) Flower coloration	A) Gas exchange
28	Which organelle produces most of a eukaryotic cell's ATP? A) Mitochondrion B) Ribosome C) Golgi apparatus D) Lysosome	A) Mitochondrion
29	What molecule carries hereditary information in most organisms? A) ATP B) DNA C) Glucose D) Cholesterol	B) DNA
30	Which cell structure is directly responsible for protein synthesis? A) Ribosome B) Vacuole C) Cell wall D) Centriole	A) Ribosome
31	Which organelle houses most of the DNA in a eukaryotic cell? A) Nucleus B) Lysosome C) Golgi apparatus D) Cell membrane	A) Nucleus
32	Which structure is present in plant cells but absent from animal cells? A) Cell wall B) Cell membrane C) Ribosome D) DNA	A) Cell wall
33	Which plant structure contains the reproductive organs in flowering plants? A) Root B) Flower C) Stem D) Leaf vein	B) Flower
34	Pollination is the transfer of pollen grains from the anther to which structure? A) Stigma B) Ovule C) Sepal D) Petal	A) Stigma
35	Which part of a seed primarily protects the embryo? A) Seed coat B) Pollen tube C) Stigma D) Petiole	A) Seed coat
36	Which set of conditions is generally needed for seed germination? A) Water, oxygen, suitable temperature B) Salt, darkness, carbon monoxide C) Only sunlight D) Only fertilizer	A) Water, oxygen, suitable temperature
37	Fungi generally differ from green plants because fungi lack which pigment? A) Chlorophyll B) Melanin C) Carotene D) Hemoglobin	A) Chlorophyll
38	A mushroom belongs to which biological group? A) Fungi B) Mammals C) Algae D) Reptiles	A) Fungi
39	What sweet liquid do bees commonly collect from flowers? A) Nectar B) Sapwood C) Latex D) Resin	A) Nectar
40	Which is the largest living animal? A) African elephant B) Blue whale C) Giraffe D) Whale shark	B) Blue whale

Figure 2. Everyday Science question-bank visual for biology and life-science revision.

41-60. Physics & Measurement
Choose one answer, then check the answer column. No explanations - exactly as requested.

No.	Question & Options	Answer
41	What is the SI unit of force? A) Newton B) Joule C) Watt D) Pascal	A) Newton
42	What is the SI unit of energy? A) Volt B) Joule C) Ampere D) Hertz	B) Joule
43	What is the SI unit of power? A) Watt B) Newton C) Kelvin D) Coulomb	A) Watt
44	What is the SI unit of pressure? A) Pascal B) Joule C) Ohm D) Tesla	A) Pascal
45	What is the SI base unit of electric current? A) Ampere B) Volt C) Watt D) Coulomb	A) Ampere
46	Which unit is used for frequency? A) Hertz B) Newton C) Pascal D) Joule	A) Hertz
47	Which SI unit is used for electric charge? A) Coulomb B) Ohm C) Watt D) Kelvin	A) Coulomb
48	Which unit measures electrical resistance? A) Ohm B) Ampere C) Hertz D) Joule	A) Ohm
49	Approximately how fast does light travel in a vacuum? A) 3 x 10^8 m/s B) 3 x 10^6 m/s C) 3 x 10^4 m/s D) 3 x 10^2 m/s	A) 3 x 10^8 m/s
50	Sound cannot travel through which medium? A) Vacuum B) Water C) Steel D) Air	A) Vacuum
51	In general, sound travels fastest through which state of matter? A) Solids B) Liquids C) Gases D) Vacuum	A) Solids
52	Which type of lens converges parallel rays of light? A) Convex lens B) Concave lens C) Plane glass D) Opaque lens	A) Convex lens
53	Which mirror is commonly used as a vehicle side-view mirror because it gives a wider field of view? A) Convex mirror B) Concave mirror C) Plane mirror only D) Parabolic mirror	A) Convex mirror
54	A simple periscope works mainly by which optical phenomenon? A) Reflection B) Diffusion C) Evaporation D) Conduction	A) Reflection
55	The splitting of white light into its component colors by a prism is called what? A) Dispersion B) Conduction C) Induction D) Resonance	A) Dispersion
56	What is the SI base unit of thermodynamic temperature? A) Kelvin B) Celsius C) Fahrenheit D) Joule	A) Kelvin
57	Which instrument measures atmospheric pressure? A) Barometer B) Hygrometer C) Ammeter D) Calorimeter	A) Barometer
58	Which instrument is used to measure humidity? A) Hygrometer B) Thermometer C) Voltmeter D) Altimeter	A) Hygrometer
59	Which instrument records earthquake vibrations? A) Seismograph B) Anemometer C) Barometer D) Micrometer	A) Seismograph
60	Which instrument is used to measure wind speed? A) Anemometer B) Rain gauge C) Hydrometer D) Pyrometer	A) Anemometer

Figure 3. General-knowledge science practice covering measurement, forces, light, sound and instruments.

61-80. Chemistry in Everyday Life
Choose one answer, then check the answer column. No explanations - exactly as requested.

No.	Question & Options	Answer
61	What is the chemical formula of water? A) H2O B) CO2 C) O2 D) NaCl	A) H2O
62	What is the chemical formula of common table salt? A) NaCl B) KClO3 C) CaCO3 D) H2SO4	A) NaCl
63	What is the chemical symbol for oxygen? A) O B) Ox C) Og D) Om	A) O
64	What is the chemical symbol for gold? A) Au B) Ag C) Gd D) Go	A) Au
65	What is the chemical symbol for silver? A) Ag B) Au C) Si D) Sr	A) Ag
66	What is the chemical symbol for iron? A) Fe B) Ir C) In D) I	A) Fe
67	What is the chemical symbol for sodium? A) Na B) S C) So D) Sd	A) Na
68	At about 25 degreesC, what is the pH of pure water? A) 7 B) 1 C) 10 D) 14	A) 7
69	A solution with a pH below 7 is generally described as what? A) Acidic B) Basic C) Neutral D) Radioactive	A) Acidic
70	Which gas makes up the largest proportion of Earth's dry atmosphere? A) Nitrogen B) Oxygen C) Carbon dioxide D) Hydrogen	A) Nitrogen
71	Approximately what percentage of Earth's dry atmosphere is oxygen? A) 21% B) 78% C) 1% D) 50%	A) 21%
72	What is the main component of natural gas? A) Methane B) Oxygen C) Nitrogen D) Chlorine	A) Methane
73	What does CNG stand for? A) Compressed Natural Gas B) Converted Nitrogen Gas C) Compressed Noble Gas D) Carbon Neutral Gas	A) Compressed Natural Gas
74	Liquefied petroleum gas (LPG) commonly consists mainly of which hydrocarbons? A) Propane and butane B) Methane and ethyne C) Hydrogen and oxygen D) Nitrogen and argon	A) Propane and butane
75	Rust on iron is mainly composed of which type of compound? A) Hydrated iron oxide B) Sodium chloride C) Calcium carbonate D) Copper sulfate	A) Hydrated iron oxide
76	Which acid is naturally abundant in lemons and other citrus fruits? A) Citric acid B) Sulfuric acid C) Nitric acid D) Hydrochloric acid	A) Citric acid
77	Which acid gives vinegar its characteristic acidity? A) Acetic acid B) Citric acid C) Carbonic acid D) Boric acid	A) Acetic acid
78	What is the common chemical name of baking soda? A) Sodium bicarbonate B) Sodium chloride C) Calcium oxide D) Magnesium sulfate	A) Sodium bicarbonate
79	What is the main active ingredient in many household chlorine bleaches? A) Sodium hypochlorite B) Sodium bicarbonate C) Calcium carbonate D) Potassium nitrate	A) Sodium hypochlorite
80	Dry ice is the solid form of which substance? A) Carbon dioxide B) Oxygen C) Water D) Nitrogen	A) Carbon dioxide

Figure 4. Everyday chemistry and factual revision visual for MCQ learners.

81-100. Earth, Environment & Space
Choose one answer, then check the answer column. No explanations - exactly as requested.

No.	Question & Options	Answer
81	In which layer of Earth's atmosphere does most weather occur? A) Troposphere B) Stratosphere C) Mesosphere D) Thermosphere	A) Troposphere
82	Most of the protective ozone layer is found in which atmospheric layer? A) Stratosphere B) Troposphere C) Exosphere D) Ionosphere only	A) Stratosphere
83	The stratospheric ozone layer helps protect life mainly by absorbing which radiation? A) Ultraviolet radiation B) Radio waves C) Sound waves D) Microwaves from Earth	A) Ultraviolet radiation
84	What is the outermost solid layer of Earth called? A) Crust B) Mantle C) Outer core D) Inner core	A) Crust
85	Which is Earth's thickest major internal layer? A) Mantle B) Crust C) Inner core D) Oceanic plate	A) Mantle
86	Which major layer of Earth is liquid? A) Outer core B) Inner core C) Crust D) Uppermost mantle only	A) Outer core
87	Which instrument is used to measure rainfall? A) Rain gauge B) Anemometer C) Barometer D) Hygrometer	A) Rain gauge
88	What is the change of water vapor into liquid water called? A) Condensation B) Evaporation C) Sublimation D) Melting	A) Condensation
89	What is the change of liquid water into water vapor called? A) Evaporation B) Freezing C) Condensation D) Deposition	A) Evaporation
90	Which of the following is a renewable energy source? A) Solar energy B) Coal C) Petroleum D) Natural gas	A) Solar energy
91	Which gas is a major greenhouse gas released by burning fossil fuels? A) Carbon dioxide B) Neon C) Helium D) Argon	A) Carbon dioxide
92	Which planet is widely known as the Red Planet? A) Mars B) Venus C) Mercury D) Neptune	A) Mars
93	Which is the largest planet in our solar system? A) Jupiter B) Saturn C) Earth D) Neptune	A) Jupiter
94	Which planet is the hottest in our solar system? A) Venus B) Mercury C) Mars D) Jupiter	A) Venus
95	Which planet is closest to the Sun? A) Mercury B) Venus C) Earth D) Mars	A) Mercury
96	Which planet is best known for its prominent ring system? A) Saturn B) Mars C) Venus D) Mercury	A) Saturn
97	How many planets are officially recognized in our solar system? A) Eight B) Nine C) Seven D) Ten	A) Eight
98	Earth is which planet from the Sun? A) Third B) Second C) Fourth D) Fifth	A) Third
99	Our solar system is located in which galaxy? A) Milky Way B) Andromeda C) Sombrero D) Whirlpool	A) Milky Way
100	Approximately how long does sunlight take to reach Earth from the Sun? A) About 8 minutes 20 seconds B) About 8 seconds C) About 80 minutes D) About 24 hours	A) About 8 minutes 20 seconds

Figure 5. Everyday Science revision visual spanning Earth science, environment and space.

A simple way to use these 100 MCQs

Attempt the questions in blocks of 20, mark only the ones you missed, and re-test those items later. When a weak science topic keeps returning, jump to the Everyday Science guide for the concept, then come back to online MCQs for another round. If science is only one part of your paper, mix it with general knowledge practice, strengthen language through English MCQ preparation, and use the Pakistan Studies preparation guide to keep your broader general-knowledge revision balanced.

Why McqsBase fits this kind of learning

A question bank is useful only when it is easy to revisit. McqsBase keeps science beside other competitive-exam categories, so you can move from a focused science session to mixed general-knowledge practice without rebuilding your study system every day. That matters because consistency is usually less glamorous than motivation - and much more dependable.

There is also a quieter lesson here for education brands: good learning content needs a clean website, sensible structure, reliable search visibility, and systems that do not get in the learner's way. Digital teams such as MoreTech Global work on that behind-the-scenes layer - web systems, automation and growth infrastructure-while the educational brand stays front and center.

Frequently Asked Questions

What is Everyday Science?

Everyday Science is basic scientific knowledge connected to ordinary life, including the human body, biology, physics, chemistry, the environment, Earth science and space.

Which topics are included in Everyday Science MCQs?

Common areas include human-body facts, plants and cells, units and measurements, light and sound, basic chemistry, atmosphere, Earth structure, energy and the solar system.

Are these 100 MCQs suitable for general knowledge learning?

Yes. The set is intentionally broad and foundational, making it useful for general knowledge revision as well as mixed MCQ-based screening and recruitment tests.

How should I practice these questions?

Try 20 at a time without checking the answers, score yourself, note the misses, and revisit only the weak facts after a short gap.

Where can I practice more Everyday Science MCQs?

Use McqsBase's dedicated Everyday Science category for additional online practice and the blog for topic guides and broader exam-preparation strategies.

Fact-checking sources

The question wording is original. Stable scientific facts were checked against authoritative educational and government sources, including: