Class 7 General Science – Daily Revision MCQ (English Medium)
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In binomial nomenclature, the scientific name of an organism has two parts. What does the FIRST part show?
Chapter 1: The Living World : Adaptations and Classification
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Answer: C. its genus
A scientific name has two parts: the first part is the genus and the second is the species (e.g. Homo sapiens).Which micro-organisms live in the root nodules of leguminous plants and fix atmospheric nitrogen?
Chapter 4: Nutrition in Living Organisms
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Answer: A. Rhizobium
Rhizobium in the root nodules of leguminous plants absorbs nitrogen from the air and converts it into nitrate, a compound.Insectivorous plants like Drosera usually grow in soil or water that lacks which of these?
Chapter 4: Nutrition in Living Organisms
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Answer: D. nitrogen compounds
Insectivorous plants grow in soil or water deficient in nitrogen compounds, so they get nutrients by catching insects.In pasteurisation, milk is heated to about what temperature for 15 minutes and then cooled quickly?
Chapter 5: Food Safety
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Answer: B. 80 °C
Pasteurisation: milk is heated to 80 °C for 15 minutes and cooled quickly; this destroys the microbes so milk keeps longer.An astronaut goes from the earth to the moon. What happens to his mass and weight?
Chapter 6: Measurement of Physical Quantities
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Answer: C. Mass stays the same, weight decreases
Mass does not change from place to place. The moon's gravitational force is less, so weight is less there.In the CGS system of measurement, in which unit is mass measured?
Chapter 6: Measurement of Physical Quantities
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Answer: B. gram
CGS system: distance in centimetres, mass in grams, time in seconds (in MKS, mass is in kilograms).A force of 10 N moves a box 3 m in the direction of the force. How much work is done?
Chapter 7: Motion, Force and Work
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Answer: D. 30 J
Work W = F × s = 10 N × 3 m = 30 J (joule).Two plastic straws are rubbed with the same woollen cloth and brought near each other. What happens?
Chapter 8: Static Electricity
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Answer: A. They repel each other
Both straws get similar charges, and there is repulsion between like electric charges.What is a gold leaf electroscope used for?
Chapter 8: Static Electricity
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Answer: B. detecting electric charge on an object
A gold leaf electroscope is a simple device to detect electric charge: its leaves open up when a charged object is brought near the disc.Bars of steel, aluminium and copper are heated together with pins stuck on them with wax. On which bar do the pins fall first?
Chapter 9: Heat
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Answer: C. copper
The pins on the copper bar fall first because heat is conducted quickly through copper.
Class 7: MCQ in other subjects
All questions are written by PadhaiNotes in our own words from the chapters of the official Maharashtra State Board Balbharati textbook (ebalbharati.in). Each question shows its chapter.