Health Natural Resources and Food Production (Class 9)

What this worksheet covers

This is an eighteen-question practice worksheet on health, natural resources and food production for Class 9, written to the pattern of the SOF National Science Olympiad (NSO). It carries 24 marks and is designed to be attempted in 45 minutes, split across three sections — Scientific Reasoning, Applying What You Know and Achievers Section. Every question is multiple choice with exactly one correct option, and every one comes with a fully worked solution rather than just an answer key — so a child who gets one wrong can see where the reasoning went astray instead of only learning that it did.

Skills your child practises

• Applied problem-solving on health, natural resources and food production at Class 9 level
• Working accurately against a time limit, as the real paper demands
• Scientific Reasoning questions in the olympiad format
• Applying What You Know questions in the olympiad format
• Achievers Section questions in the olympiad format
• Reading worked solutions to find the step that went wrong

How to use it

1. 1There are 18 questions in this worksheet. All questions are compulsory.
2. 2Each question has four options (A), (B), (C) and (D). Exactly one option is correct.
3. 3Questions 1–15 carry 1 mark each. Questions 16–18 (Achievers Section) carry 3 marks each.
4. 4There is no negative marking. Study every diagram and table carefully.

Sample questions from this worksheet

A preview of what's inside Health Natural Resources and Food Production (Class 9) — the PDF has the full set, and every question comes with a worked solution like these.

1. 1. Malaria is caused by Plasmodium, which is spread by the _______.

   • AHousefly
   • BMale Anopheles mosquito
   • CFemale Anopheles mosquitocorrect
   • DAedes mosquito
   Solution: Only the female Anopheles feeds on blood, which she needs for her eggs, and so she carries the Plasmodium parasite from one person to another. Aedes spreads dengue and chikungunya instead.

2. 2. A farmer grows wheat one season and gram (a pulse) the next, in the same field. The main benefit of this practice is that _______.

   • AThe field needs no sunlight
   • BThe soil dries out faster
   • CWeeds are completely destroyed
   • DThe soil is enriched with nitrogencorrect
   Solution: Gram is a legume, so its root nodules carry Rhizobium, which fixes atmospheric nitrogen. Alternating it with a nitrogen-hungry cereal like wheat restores the soil’s nitrogen and reduces the need for fertiliser. This practice is crop rotation.

3. 3. Assertion (A): A doctor refuses to prescribe antibiotics to a patient suffering from a common cold.Reason (R): The common cold is caused by a virus, and antibiotics act only on bacteria.

   • ABoth A and R are true and R is the correct explanation of Acorrect
   • BBoth A and R are true but R is not the correct explanation of A
   • CA is true but R is false
   • DA is false but R is true
   Solution: Antibiotics attack processes peculiar to bacteria, such as cell-wall synthesis, and viruses have none of these. Taking them for a viral cold does no good and encourages resistant bacteria to develop. Both statements are true and the second is precisely why the doctor refuses, so R explains A.