8th Class Science Question Paper

Question Paper Overview

• The Class 8 Science paper covers the annual syllabus.
• Thorough study of the question paper helps achieve high marks.
• The paper contains 26 questions.
• Completion time is expected to be within 2-3 hours.

Instructions and Marking Scheme

• Questions 1-5 are multiple-choice, with each carrying one mark.
• Selection of the correct option is required for each multiple-choice question.

Multiple Choice Questions and Answers

• Question 1: Sunlight is an inexhaustible natural resource.
  • Minerals, coal, and petrol are exhaustible.
• Question 2: AIDS spreads through blood transfusion.
  • It spreads via the exchange of bodily fluids.
• Question 3: Wheat and gram are Rabi crops.
  • Rabi crops are sown in winter and harvested in spring.
• Question 4: Dicotyledons focus on plant classification.

Fill in the Blank Questions

• Each fill-in-the-blank question carries one mark.
• Question 6: Kharif crops are sown from June to September during the monsoon season.
• Question 7: Aedes mosquitoes carry the Dengue virus.
• Question 8: LPG stands for Liquefied Petroleum Gas.
• Question 9: Asexual reproduction involves only one parent.
• Question 10: Force is a push or pull acting on an object.

Very Short Answer Questions (2 marks each)

• Questions 11-16 require concise two-sentence answers.
• Question 11: Weeds are unwanted plants in fields that compete with crops for resources, reducing yield.
• Question 12: Microorganisms cause Typhoid and Polio in animals, and Citrus canker and Yellow vein mosaic of bhindi in plants.
• Question 13: Fossil fuels are formed from dead organisms, including coal, natural gas, and petroleum.
• Question 14: IVF stands for In Vitro Fertilization.
• Question 15: Distilled water doesn't conduct electricity due to the absence of ions and salts.
• Question 16: Deforestation is the clearing of forests for agriculture, urbanization, etc.

Short Answer Questions (3 marks each)

• Questions 17-22 require answers in 40-50 words.
• Question 17: Adolescence is a period of bodily changes leading to reproductive maturity, starting around 11 years and lasting until 18 or 19 years.
• Question 18: Fine powder on a carrom board reduces friction, allowing smoother striker movement.
• Question 19: Noise pollution sources include loud televisions, radios, kitchen appliances, coolers, and air conditioners.
• Question 20: Coal comes from deep inside the Earth, formed from compressed dead plant matter over millions of years under high pressure and temperature.
• Question 21: Two examples of shape change by applying force include pressing a rubber ball and stretching a rubber band.
• Question 22: Electroplated objects include imitation jewelry, bathroom fixtures, gas burners, sofa frames, and bicycle parts.

Long Answer Questions (5 marks each)

• Questions 23-26 require answers in 75-120 words.
• Question 23: National Parks of Madhya Pradesh: Bandhavgarh (Umaria, Shahdol), Kanha Kisli (Mandla), Madhav (Shivpuri), Panna (Chhatarpur), and Pench (Balaghat).
• Question 24: Amoeba reproduces asexually through binary fission, where the cell divides into two identical daughter cells after the nucleus and cytoplasm split.
• Question 25: Plant vs. Animal Cells: Cell wall (present vs. absent), Plastids (present vs. absent), Nucleus location (edge vs. center), Vacuoles (large central vs. small or absent).
• Question 26: Microorganisms are useful for:
  • Environmental cleanup
  • Medicine and vaccine production
  • Increasing soil fertility
  • Making bread, cakes, and yogurt
  • Protecting plants from diseases
  • Fermentation processes
  • Producing alcohol and acetic acid
  • Making pickles and cheese
  • Digestion
  • Ecosystem balance