BASICS OF EVERY DAY SCIENCE EDS
Basics of Every Day Science EDS
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چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
Repeating sounds
Refracted sounds
Absorbed sounds
Amplified sounds
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Explanation
An echo is a sound that reflects off a surface and is heard again. It occurs when sound waves bounce back from a distant surface like a wall or mountain. Echoes are common in caves, valleys, and empty halls . The reflected sound is perceived after a short delay. Last verified on 17-03-2026
جب روشنی ____ سے داخل ہوتی ہے تو روشنی کا مکمل اندرونی انعکاس ممکن ہے؟
Air to water
Glass to glass
Water to air
Air to glass
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Explanation
Total internal reflection occurs when light travels from a denser medium to a rarer medium . The angle of incidence must be greater than the critical angle for the two media. Light is completely reflected back into the denser medium instead of refracting . Common examples: optical fibers, diamonds, and mirages. Last verified on 17-03-2026
آئنز ایٹموں کے چارج شدہ ذرات ہیں اور ____ کی وجہ سے منفی اور مثبت چارجز بناتے ہیں؟
Proton
Electron
Neutron
None of these
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Explanation
Ions are charged particles formed when an atom gains or loses electrons . Loss of electrons creates a positively charged ion (cation) . Gain of electrons creates a negatively charged ion (anion). Last verified on 17-03-2026
خصوصیات کی مثالوں میں پگھلنا، گیس میں منتقلی، استحکام کی تبدیلی اور کرسٹل کی شکل میں تبدیلی شامل ہے۔ _____
Physical
Chemical
Nuclear
Biological
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Explanation
A change in physical appearance or state of a substance , such as a change in shape, size, color, or phase (solid, liquid, gas), is called a Physical Change. The are examples of Physical Changes:
Melting (ice cream, wax, chocolate, ice and change from solid to liquid ) Phase changes ( boiling, freezing, condensation ) Crushing (chalk) Tearing (paper) Crumpling (aluminium foil) Stretching (rubber band) Mixing (sugar in water) Dissolving (sugar, salt in water) Moulding (clay, metals) Slicing (fruit) Forming of frost (from water vapors) Transition to a gas (change from liquid to gas) Change of durability (change in texture or strength) Changes to crystal form (change in crystal structure) Last verified on 17-03-2026
ایک بالغ، بڑی بیضہ دانی اور بیج _____ ہیں؟
Stem
Leaf
Flower
Fruit
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Explanation
A mature, large ovary and seed are characteristics of a fruit . A fruit is the mature ovary of a plant , which contains seeds . It typically surrounded by a fleshy, edible pulp . Last verified on 17-03-2026
پودوں میں جڑوں کے نلی نما حصے کا نظام میں _____ کا کام ہوتا ہے۔
Support the plant
Absorb salts and gases
Photosynthesis
Reproduction
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Explanation
Root hairs are tiny tubular outgrowths of roots in plants. They increase the surface area of roots for efficient absorption. Their main function is to absorb water, mineral salts, and gases from the soil. They do not perform photosynthesis or reproduction. Last verified on 17-03-2026
پودوں کو پناہ کی ضرورت نہیں ہے لیکن انہیں _____ کی ضرورت ہے؟
Change
Living
Air
Space
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Explanation
Air is essential for plants because they need gases from the air for survival and growth . Plants take carbon dioxide (CO₂) from the air during photosynthesis to make their food. They also use oxygen (O₂) from the air for respiration to release energy. Without air , plants cannot perform important life processes. Last verified on 16-03-2026
پانی میں تیزاب کی تھوڑی مقدار شامل ہونے پر مندرجہ ذیل میں سے کون سا واقعہ ہوتا ہے؟
Precipitation and Neutralization
Evaporation and Condensation
Sublimation and Deposition
Dilution and Ionisation
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Explanation
Dilution refers to the process of decreasing the concentration of a solution by adding more solvent. While ionisation involves the formation of ions from molecules in a solution . Last verified on 16-03-2026
کچھ پھل جیسے آم، لیموں، کچے انگور، نارنگی وغیرہ میں _____ کی موجودگی کا ذائقہ کھٹا ہوتا ہے؟
Tartaric acid
Malic acid
Oxalic acid
Citric acid
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Explanation
Citric acid is a natural preservative found in many fruits, particularly in citrus fruits like lemons, oranges, and grapefruits.It's responsible for their sour taste and is also used as a food additive.Other fruits like mangoes, grapes, and strawberries also contain citric acid, although in smaller amounts.The presence of citric acid gives these fruits their characteristic sour taste.Last verified on 16-03-2026
آنکھوں کے سامنے دھندلی تصویر ______ کی وجہ سے بنتی ہے؟
Light focused in front of the retina
Light focused behind the retina
Light focused at a point on retina
Light focused at a point beyond retina
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Explanation
When light is focused in front of the retina , it creates a blurred image, indicating nearsightedness (myopia).This occurs because the eyeball is too long or the cornea is too steep.It causing light to focus before reaching the retina.Last verified on 16-03-2026