Science Quiz Class 6

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| By Swati Singh
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Swati Singh
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Quizzes Created: 3 | Total Attempts: 7,372
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  • 1/10 Questions
    The earth’s surface is protected from the harmful UV rays of the sun by - ProProfs

    The earth’s surface is protected from the harmful UV rays of the sun by

    • Ozone layer
    • Carbon dioxide layer
    • Carbon monoxide layer
    • Troposphere
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About This Quiz

This Science Quiz for Class 6 covers key topics like light reflection, anaerobic respiration, disease prevention, phase changes, and botanical science, focusing on foundational scientific concepts.

Science Quiz Class 6 - Quiz

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  • 2. 
    Oranges are rich source of - ProProfs

    Oranges are rich source of

    • Carbohydrates

    • Proteins

    • Fats

    • Vitamins

    Correct Answer
    A. Vitamins
    Explanation
    Oranges contain 53 mg of vitamin C per 100 grams. One medium orange delivers 70 mg of vitamin C. Other citrus fruits, such as grapefruit, mandarins and limes, are also good sources of this vitamin.

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  • 3. 
    When a gas turns into a liquid, the process is called - ProProfs

    When a gas turns into a liquid, the process is called

    • Condensation

    • Evaporation

    • Deposition

    • Sublimation

    Correct Answer
    A. Condensation
    Explanation
    Condensation is the process by which water vapor (water in its gas form) turns into liquid. It happens when molecules of water vapor cool and collect together as liquid water. Water vapor can be found on the outside of cold glasses, the warm side of windows, and in the clouds up in the air.

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  • 4. 
    The largest gland in the human body is - ProProfs

    The largest gland in the human body is

    • Thyroid

    • Pineal

    • Liver

    • Kidney

    Correct Answer
    A. Liver
    Explanation
    Liver is the largest gland in human body. It is also the largest (internal) organ in our body and can weigh up to 1.5 kg for a human adult. That is, about 1/50th of the body weight is because of liver.

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  • 5. 
    Which of these diseases is not caused by improper disposal of sewage? - ProProfs

    Which of these diseases is not caused by improper disposal of sewage?

    • Cholera

    • Heart attack

    • Jaundice

    • Typhoid

    Correct Answer
    A. Heart attack
    Explanation
    Heart attack is not caused by improper disposal of sewage. Heart attack occurs when the blood flow to the heart is blocked, usually due to a buildup of cholesterol and other substances in the arteries. Improper disposal of sewage can lead to the spread of waterborne diseases such as cholera, typhoid, and jaundice, but it does not directly cause heart attacks.

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  • 6. 
    Which of the following is a biodegradable pollutant? - ProProfs

    Which of the following is a biodegradable pollutant?

    • DDT

    • Domestic wastes

    • Pesticides

    • Mercury salts

    Correct Answer
    A. Domestic wastes
    Explanation
    Biodegradable waste includes any organic matter in waste which can be broken down into carbon dioxide, water, methane or simple organic molecules by micro-organisms and other living things by composting, aerobic digestion, anaerobic digestion or similar processes.

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  • 7. 
    Which mirror shows a lateral inversion of light? - ProProfs

    Which mirror shows a lateral inversion of light?

    • Plane mirror

    • Convex mirror

    • Concave mirror

    • None of the above

    Correct Answer
    A. Plane mirror
    Explanation
    Lateral inversion for mirrors refers to the image being seen inverted in terms of what is left and right. When facing a mirror, the left side of an object appears to be the right side of the virtual image in the mirror. This does not apply from top to bottom though, only left to right.

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  • 8. 
    What are the products of anaerobic respiration in yeast? - ProProfs

    What are the products of anaerobic respiration in yeast?

    • Alcohol and Carbon dioxide

    • Carbon dioxide and glucose

    • Oxygen and alcohol

    • Glucose and oxygen

    Correct Answer
    A. Alcohol and Carbon dioxide
    Explanation
    Anaerobic respiration is the respiration which occurs in the absence of oxygen. It is carried out by yeast and some bacteria. In this, glucose breaks down into pyruvates in absence of oxygen. Glucose breaks down into ethanol, carbon dioxide and gives two molecules of ATP.

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  • 9. 
    Which of the following leaf modifications occurs/occur in desert areas to inhibit water loss?  1. Hard and waxy leaves 2. Tiny leaves or no leaves 3. Thorns instead of leaves Select the correct answer using the codes given below. - ProProfs

    Which of the following leaf modifications occurs/occur in desert areas to inhibit water loss?  1. Hard and waxy leaves 2. Tiny leaves or no leaves 3. Thorns instead of leaves Select the correct answer using the codes given below.

    • 1 and 2 only

    • 2 only

    • 1 and 3 only

    • 1, 2 and 3

    Correct Answer
    A. 1, 2 and 3
    Explanation
    Desert shrubs typically have small leaves, protective thorns, multiple branches, unpleasant smells and tastes, and extensive root systems, all adaptations to the arid environment. Some have small, shiny, waxy leaves that reflect heat and block evaporation.

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  • 10. 
    A plant leaf appear to be green because it - ProProfs

    A plant leaf appear to be green because it

    • Absorbs green light

    • Relfects all but absorbs yellow and green light

    • Reflect green light

    • Absorbs red and yellow light

    Correct Answer
    A. Reflect green light
    Explanation
    Green plants are green because they contain a pigment called chlorophyll. Chlorophyll absorbs certain wavelengths of light within the visible light spectrum. ... Green light is not absorbed but reflected, making the plant appear green. Chlorophyll is found in the chloroplasts of plants.

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Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Jan 10, 2025
    Quiz Edited by
    ProProfs Editorial Team
  • May 01, 2020
    Quiz Created by
    Swati Singh
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