Science Full Practice Exam – Set 1 (Class 3)

What this worksheet covers

This is a 35-question practice worksheet on full practice exam — set 1 for Class 3, written to the pattern of the SOF National Science Olympiad (NSO). It carries 40 marks and is designed to be attempted in 60 minutes, split across three sections — Section 1 — Logical Reasoning, Section 2 — Science 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 full practice exam — set 1 at Class 3 level
• Working accurately against a time limit, as the real paper demands
• Section 1 — Logical Reasoning questions in the olympiad format
• Section 2 — Science 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 35 questions in this paper. All questions are compulsory.
2. 2Each question has four options (A), (B), (C) and (D). Exactly one option is correct.
3. 3Questions 1–30 carry 1 mark each. Questions 31–35 (Achievers Section) carry 2 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 Science Full Practice Exam – Set 1 (Class 3) — the PDF has the full set, and every question comes with a worked solution like these.

1. 1. What comes next in the series? 1, 4, 7, 10, ____

   • A11
   • B12
   • C13correct
   • D14
   Solution: Each number is 3 more than the one before it.
   10 + 3 = 13.

2. 2. The process by which green plants make their own food is called _______.

   • ADigestion
   • BGermination
   • CRespiration
   • DPhotosynthesiscorrect
   Solution: Photosynthesis is the process in which leaves use sunlight, carbon dioxide and water to make food.

3. 3. Consider the following statements.(i) All animals that live in water breathe through gills.(ii) A tadpole lives in water but an adult frog can live on land.(iii) Carnivores have sharp, pointed teeth for tearing flesh.Which of the statements is/are correct?

   • A(i) and (ii) only
   • B(ii) and (iii) onlycorrect
   • C(i) and (iii) only
   • DAll three
   Solution: Statement (i) is false — whales, dolphins and turtles live in water but breathe air with lungs. Statement (ii) is true; the tadpole loses its gills and tail as it becomes a frog. Statement (iii) is true. Hence (ii) and (iii).