Electricity 1. What is the SI unit of electric current?A) VoltB) AmpereC) OhmD) CoulombAnswer: B) Ampere 2. Which instrument measures electric current in a circuit?A) VoltmeterB) AmmeterC) GalvanometerD) RheostatAnswer: B) Ammeter 3. How does a switch function in an electric circuit?A) Generates electricityB) Opens or closes the circuitC) Increases resistanceD) Decreases voltageAnswer: B) Opens or […]
The Human Eye and the Colorful World What is the transparent bulge on the front surface of the eyeball called?a) Corneab) Retinac) Irisd) PupilAnswer: a) Cornea What part of the eye controls the size of the pupil?a) Retinab) Corneac) Irisd) Optic nerveAnswer: c) Iris Where is the image formed in the human eye?a) Corneab)
Light Reflection and Refraction What is the principal focus of a concave mirror?a) The point where parallel rays convergeb) The point where rays divergec) The point where the mirror is curvedd) The center of curvatureAnswer: a) The point where parallel rays converge The radius of curvature of a spherical mirror is 20 cm. What
Heredity 1. What is heredity?a) The process of creating DNAb) The transmission of traits from one generation to the nextc) The study of living organismsd) The process of asexual reproductionAnswer: b 2. What leads to variations in sexually reproducing organisms?a) Environmental factorsb) DNA copying errorsc) Independent inheritance of traitsd) All of the aboveAnswer: d 3.
How to Organisms Reproduce 1. Why do organisms reproduce?a) To maintain their body designb) To ensure species survivalc) To grow and developd) To obtain energyAnswer: b 2. What is the basis of variation during reproduction?a) Accurate DNA copyingb) Inaccurate DNA copyingc) Formation of identical cellsd) Environmental factors onlyAnswer: b 3. Why is variation beneficial to
Control and Coordination What is the main function of the nervous system in animals?a) Digestionb) Control and coordinationc) Blood circulationd) ExcretionAnswer: b Which part of the brain is responsible for maintaining posture and balance?a) Forebrainb) Midbrainc) Cerebellumd) HypothalamusAnswer: c What type of receptors detect smell?a) Gustatory receptorsb) Photoreceptorsc) Olfactory receptorsd) ThermoreceptorsAnswer: c What is a
Life Processes 1. What is the primary criterion to determine if something is alive?a) Ability to reproduceb) Ability to breathec) Presence of molecular movementsd) Ability to move visiblyAnswer: c) Presence of molecular movements 2. Viruses are often debated as living or non-living because:a) They lack oxygenb) They cannot move visiblyc) They show no molecular movement
Carbon and its Compounds What is the percentage of carbon present in the Earth’s crust?a) 0.02%b) 0.03%c) 2%d) 3%Answer: a) 0.02% Carbon achieves noble gas configuration by:a) Gaining four electronsb) Losing four electronsc) Sharing four electronsd) Donating four electronsAnswer: c) Sharing four electrons What is the atomic number of carbon?a) 4b) 6c) 8d) 10Answer:
Causes and effects of conflicts: French and Indian War 501. What was the primary cause of the French and Indian War?A) Disputes over the fur tradeB) Competition for control of the Ohio River ValleyC) Religious tensions between Catholics and ProtestantsD) Conflicts over fishing rights in the Atlantic OceanAnswer: B) Competition for control of the Ohio
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Economic systems: Mercantilism, Transatlantic Slave Trade 401. What was the main goal of the economic theory of mercantilism?A) To ensure free trade among nationsB) To accumulate wealth by maintaining a favorable balance of tradeC) To encourage industrialization in coloniesD) To promote equality in global wealth distributionAnswer: B) To accumulate wealth by maintaining a favorable balance
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