Class 10 Science Exam Paper
Duration: 2 Hours
Instructions:
- All questions are compulsory.
- Write your answers in the spaces provided.
- Marks are indicated beside each question.
- Write neatly and legibly.
Section A: Multiple Choice Questions (1 mark each)
Which of the following is not a renewable source of energy? a) Solar energy b) Wind energy c) Coal d) Biomass
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What is the chemical formula of water? a) H2O2 b) CO2 c) H2O d) HO2
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Section B: Short Answer Questions (2 marks each)
Define the term "acceleration" and provide its SI unit.
- Answer: _______________________________________________________
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Explain the difference between an element and a compound with examples.
- Answer: _______________________________________________________
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Section C: True or False (1 mark each)
The nucleus of an atom is positively charged. (True/False)
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All acids have a pH value greater than 7. (True/False)
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Section D: Match the Following (2 marks each)
Match the terms in Column A with their appropriate descriptions in Column B.
| Column A | Column B |
|---|---|
| 7. Fossil fuels | a) Non-renewable source of energy |
| 8. Mitochondria | b) Powerhouse of the cell |
Section E: Long Answer Questions (5 marks each)
Explain the process of photosynthesis. Describe the role of chlorophyll and sunlight in this process.
- Answer: _______________________________________________________
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Describe the structure of a typical plant cell. Explain the functions of the cell wall, chloroplasts, and vacuole in plant cells.
- Answer: _______________________________________________________
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Section F: Case Study (10 marks)
Read the following case study and answer the questions that follow:
A group of students conducted an experiment to investigate the effects of different types of fertilizers on plant growth. They planted tomato seedlings in separate pots and used three different types of fertilizers: organic compost, chemical fertilizer A, and chemical fertilizer B. They watered the plants regularly and recorded their observations over a period of four weeks.
After four weeks, they measured the height of the plants and the number of fruits produced by each plant.
Questions:
What is the independent variable in this experiment?
- Answer: _______________________________________________________
Identify the dependent variables in this experiment.
- Answer: _______________________________________________________
Discuss the possible advantages and disadvantages of using organic compost compared to chemical fertilizers in agriculture.
- Answer: _______________________________________________________
Analyze the results of the experiment based on the height of the plants and the number of fruits produced. Which type of fertilizer appears to be most effective, and why?
- Answer: _______________________________________________________
