Year 8/7th Grade Exam Quiz :) Science

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| By Libertymae
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Libertymae
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Quizzes Created: 1 | Total Attempts: 4,467
Questions: 5 | Attempts: 4,467

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8th Grade Quizzes & Trivia

Just in case you wanted a little revision quiz ::)


Questions and Answers
  • 1. 

    What is the word equation for respiration?

    • A.

      Water+Carbon Dioxide= Nitrogen+Oxygen

    • B.

      Glucose+Oxygen=Carbon Dioxide+Water

    • C.

      Glucose+Oxygen=Carbon Dioxide+Nitrogen

    Correct Answer
    B. Glucose+Oxygen=Carbon Dioxide+Water
    Explanation
    The word equation for respiration is glucose + oxygen = carbon dioxide + water. During respiration, glucose is broken down in the presence of oxygen to produce carbon dioxide and water. This process releases energy that is used by cells for various functions.

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  • 2. 

    Heart Disease is caused by lack of Vitamin C?

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    Heart disease is not caused by lack of Vitamin C. Heart disease is a complex condition that can have multiple causes, including high blood pressure, high cholesterol, smoking, obesity, and a sedentary lifestyle. While Vitamin C is important for overall health and can help support a healthy cardiovascular system, it is not the sole cause of heart disease. Other factors such as genetics, age, and underlying medical conditions also play a significant role in the development of heart disease.

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  • 3. 

    What is the effect called when light hits a window and changes direction?

    • A.

      Reflection

    • B.

      Spectrum

    • C.

      Refraction

    • D.

      Mirror Line

    Correct Answer
    C. Refraction
    Explanation
    Refraction is the correct answer because when light passes through a window, it changes direction due to the change in speed caused by the change in medium. This phenomenon is known as refraction.

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  • 4. 

    True or False? Light travels in straight lines??

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    Light travels in straight lines because it is a form of electromagnetic radiation that propagates through space as waves. These waves move in a straight line until they encounter an obstacle or are refracted or reflected by a medium. This behavior is explained by the principle of rectilinear propagation of light, which states that light travels in straight lines unless it interacts with another object or medium.

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