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Weekly chapter test: CBSE Class 8
Sun 1 Nov – Sat 7 Nov 2026: Health: The Ultimate Treasure (Science), 10 questions. Everyone in CBSE Class 8 gets this test all week; a new chapter comes on Sunday, in turn from the 27 chapters of the class that have a checked question pool.
Questions are written with AI and answer-checked by Shishya; they are not taken from the textbook. Read the chapter page first if you need to.
1. Meera's younger brother has diarrhoea and is losing fluids rapidly. Their mother decides to prepare ORS at home. Which combination should she use to make Oral Rehydration Solution?
2. A town has two neighbouring colonies. Colony A has covered drains, regular garbage collection, and piped chlorinated water. Colony B has open drains, garbage dumps, and residents use pond water for drinking. In one year, Colony A reported 5 cases of diarrhoea while Colony B reported 120 cases. Using your understanding of public health, explain why the disease rates differ so much.
3. A health worker visits a slum and notices open drains, garbage piles, and children drinking water directly from a hand pump without boiling. List two diseases that are likely to spread in this area and the preventive action for each.
4. Reena, a Class 8 student, has been preparing for exams for three weeks. She sleeps only 4 hours a night, skips meals, avoids talking to friends, and feels anxious all the time. Her mother says she is not physically sick. Using the WHO definition of health, evaluate whether Reena can be considered healthy and justify your answer.
5. During monsoon, the municipal workers spray chemicals in drains and cover water tanks in Ramesh's colony. Which disease are these measures mainly aimed at preventing?
6. A health worker removes stagnant water from pots and tyres in a locality. Which disease is she mainly trying to prevent, and why does this method work?
7. Priya's doctor told her she has low haemoglobin and asked her to eat iron-rich foods. Which of the following should Priya include more in her daily diet?
8. Ravi argues that if he eats well and exercises, he is completely healthy even if he feels anxious and stressed every day. Is Ravi's understanding correct?
9. In a village, several people developed diarrhoea after a flood. The health worker gave them packets of ORS. What does ORS help to treat?
10. Sunita complains of tiredness, difficulty concentrating in class, and frequent headaches. Her diet includes mostly rice and dal with very few vegetables or fruits. A doctor suspects a deficiency disease. Identify the likely problem and suggest a dietary correction.
How the score and percentile work
- Your answers are checked on Shishya's server against the answer keys; the explanations show after you submit.
- With a free account, your first try at this week's test is counted: only the number right and the total are kept, under a one-way key instead of your account, with no name. A second try is checked but not counted.
- The percentile compares your counted score with the other counted scores of this week's test only, and shows only once 30 students have been counted. Below that the result says “not enough takers yet”. No ranks, no names, no lists.
- The result card you can share holds the class, the chapter, the week and your score: no name, no school, no account.