Year 8/7th Grade Exam Quiz :) Science

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| By Libertymae

Libertymae

Community Contributor

Quizzes Created: 1 | Total Attempts: 4,470

Questions: 5 | Attempts: 4,470 | Updated: Mar 21, 2023

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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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3
0
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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4
2
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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2
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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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Current Version
Mar 21, 2023

Quiz Edited by
ProProfs Editorial Team
May 26, 2012

Quiz Created by
Libertymae

Year 8/7th Grade Exam Quiz :) Science

What is the word equation for respiration?

Heart Disease is caused by lack of Vitamin C?

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

True or False? Light travels in straight lines??