Sample Solved Question Paper - Final Term : NCERT Class 8 Science

FInal Term Examination

Class: 8
Subject: Science
Maximum Marks: 80
Time Allowed: 3 hours

Section A: Objective Type Questions (1 mark each)

1. Fill in the blanks:
a) The process of changing water vapor into water is called ______. (Condensation)
b) ______ is the metal used in making filaments of electric bulbs. (Tungsten)

2. Match the following:
| Column A | Column B |
|-------------------|--------------------------|
| a) Acid | 1. Magnesium ribbon |
| b) Base | 2. Blue litmus turns red |
| c) Neutral | 3. Water |

Answer:
a → 2, b → 1, c → 3

3. Multiple Choice Questions:
a) Which one of the following is a natural polymer?
i) Nylon
ii) Silk
iii) Polyester
iv) Acrylic
Answer: ii) Silk

b) What is the chemical formula of carbon dioxide?
i) CO
ii) CO₂
iii) C₂O
iv) C₂O₄
Answer: ii) CO₂

Section B: Short Answer Type Questions (2 marks each)

4. Define photosynthesis. Write its equation.
Answer:
Photosynthesis is the process by which green plants prepare their own food using carbon dioxide, water, and sunlight.
Equation: 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂

5. Differentiate between renewable and non-renewable energy sources.
Answer:

  • Renewable: Can be replenished (e.g., solar energy).
  • Non-renewable: Finite resources (e.g., coal).

Section C: Long Answer Type Questions (3 marks each)

6. Explain the structure and function of the human heart.
Answer:
The heart is a muscular organ divided into four chambers: two atria and two ventricles. It pumps oxygenated blood to the body and deoxygenated blood to the lungs for purification.

7. Write three differences between metals and non-metals.
Answer:
| Metals | Non-metals |
|------------------------------|-------------------------------|
| Conduct electricity | Do not conduct electricity |
| Malleable and ductile | Brittle |
| Lustrous (shiny) | Non-lustrous (dull) |

Section D: Application-Based Questions (5 marks each)

8. Describe the water cycle with a labeled diagram.
Answer:
The water cycle consists of evaporation, condensation, precipitation, and collection.
(Draw a labeled diagram showing the processes.)

9. How does friction help in daily life? List two ways to reduce friction.
Answer:

  • Friction helps in walking and holding objects.
  • Ways to reduce friction:
    a) Use lubricants like oil.
    b) Use ball bearings.

Section E: Diagram-Based Questions (5 marks each)

10. Draw a neat and labeled diagram of a leaf and explain its functions.
Answer:

  • (Draw and label parts like lamina, veins, petiole, and midrib.)
  • Functions: Photosynthesis, transpiration, and gas exchange.

11. Explain the digestive system in humans with a labeled diagram.
Answer:

  • (Draw and label parts like mouth, esophagus, stomach, intestines, liver, etc.)
  • Process: Ingestion → Digestion → Absorption → Assimilation → Egestion.


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