Class 7 General Science – Daily Revision MCQ (English Medium)
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In 1665, which scientist looked at a thin slice of cork under a microscope and saw small box-like compartments?
Chapter 11: Cell Structure and Micro-organisms
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Answer: A. Robert Hooke
Robert Hooke saw honeycomb-like compartments in cork in 1665 and called them cells.Which cell organelle is called the 'powerhouse of the cell' because it produces energy?
Chapter 11: Cell Structure and Micro-organisms
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Answer: C. Mitochondrion
Mitochondria produce energy, so they are called the powerhouses of the cell.The enzyme ptyalin in our saliva changes starch into which sugar?
Chapter 12: The Muscular System and Digestive System in Human Beings
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Answer: B. maltose
Ptyalin (salivary amylase) converts starch into the sugar maltose.Which is the largest gland in the human body?
Chapter 12: The Muscular System and Digestive System in Human Beings
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Answer: D. liver
The textbook states that the liver is the largest gland in the body and has a rich blood supply.Iron articles are given a thin coat of zinc so that they do not corrode. What is this process called?
Chapter 13: Changes – Physical and Chemical
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Answer: B. galvanization
Coating iron with a thin layer of zinc to prevent corrosion is called galvanization (tin on copper/brass is tinning).Which of these is a periodic change?
Chapter 13: Changes – Physical and Chemical
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Answer: C. A high tide coming after a low tide in the sea
Tides come again and again after a definite interval of time, so they are periodic; the others have no fixed interval.An extended source of light makes a shadow of a ball with a faint part and a dark part. What is the faint part called?
Chapter 17: Effects of Light
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Answer: A. penumbra
With an extended source the faint outer part of the shadow is the penumbra and the dark part is the umbra.Why does the sky look blue during the day?
Chapter 17: Effects of Light
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Answer: D. Gas molecules in the air scatter the blue part of sunlight the most
Molecules of gases like nitrogen and oxygen scatter sunlight, and blue light is scattered the most, so the sky looks blue.If the amplitude of vibration of a sound source is doubled, what happens to the intensity of the sound?
Chapter 18: Sound : Production of Sound
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Answer: C. It becomes four times
Intensity of sound is proportional to the square of the amplitude, so doubling the amplitude makes it 2² = 4 times.The ecliptic is imagined to be divided into 12 equal parts called zodiac signs. How many degrees does each part cover?
Chapter 20: In the World of Stars
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Answer: B. 30°
360° ÷ 12 = 30°, so each zodiac sign covers 30° of the ecliptic.
Class 7: MCQ in other subjects
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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.