General Science/Everyday Science MCQs
Topic Notes: General Science/Everyday Science
MCQs and preparation resources for competitive exams, covering important concepts, past papers, and detailed explanations.
Plato
- Biography: Ancient Greek philosopher (427–347 BCE), student of Socrates and teacher of Aristotle, founder of the Academy in Athens.
- Important Ideas:
- Theory of Forms
- Philosopher-King
- Ideal State
91
A psephologist specializes in the study of what?
Answer:
Voting and elections
Psephology analyzes elections, voter behavior, and opinion polling. It integrates statistics and political science. Seismology studies earthquakes, cryogenics low temperatures, and mycology fungi. Hence, A is correct.
92
Ichthyologists study which organisms?
Answer:
Fish
Ichthyologists focus on fish biology, ecology, and evolution. Their work informs fisheries and conservation. Dendrology studies trees, conchology shells, and ornithology birds. Thus, A is correct.
93
Steganography is most accurately described as which practice?
Answer:
Concealing messages (e.g., with invisible ink)
Steganography hides the existence of messages, historically via invisible inks and, today, via digital media. It differs from cryptography, which obscures content rather than presence. Psephology studies elections, hyetology studies rainfall, and cartography maps terrains. Therefore, A is correct.
94
Amniocentesis is a procedure used primarily for what purpose?
Answer:
Prenatal genetic testing (including fetal sex determination)
Amniocentesis samples amniotic fluid to analyze fetal chromosomes and genetic markers, which can reveal sex. It is a diagnostic, not therapeutic, procedure. Otology treats ear infections, hyetology measures rainfall, and petrophysics concerns rock properties. Thus, A is correct.
95
Petrology is the study of what?
Answer:
Rocks in the Earth’s crust
Petrology examines origin, composition, and classification of rocks. It uses fieldwork, microscopy, and geochemistry. Philology studies language, penology prisons, and graphology handwriting. Therefore, A is correct.
96
Mycology also encompasses the study of what?
Answer:
Fungal diseases
Mycology includes medical mycology, which examines diseases caused by fungi. It also covers ecology and taxonomy. Ornithology, petrology, and geomorphology cover the other options, respectively. Hence, A is correct.
97
Hyetology is the study of which atmospheric element?
Answer:
Rainfall
Hyetology focuses on precipitation, especially rainfall measurement and distribution. It contributes to hydrology and climate studies. Anemology addresses winds, atmospheric chemistry addresses ozone, and electrification is a different subfield. Therefore, A is correct.
98
Hydroponics refers to which cultivation method?
Answer:
Growing plants without soil
Hydroponics uses nutrient solutions to grow plants in inert media or water, eliminating soil. It allows precise control of nutrients and water. Grafting is a propagation technique, aquaculture raises fish, and log culture is a mycology method. Thus, A is correct.
99
Cryptography deals primarily with which activity?
Answer:
Secret writing and secure communication
Cryptography designs methods to protect information through encryption, authentication, and integrity checks. It is one component of cryptology. Conchology studies shells, hyetology rainfall, and penology prisons. Hence, A is correct.
100
Meteorology focuses on the study of what?
Answer:
Weather and the atmosphere
Meteorology examines atmospheric processes, weather patterns, and climate. It includes forecasting and analysis of temperature, pressure, and humidity. Petrology studies rocks, numismatics coins, and ornithology birds. Therefore, A is correct.