Science Full Practice Exam – Set 3 (Class 7)

What this worksheet covers

This is a 50-question practice worksheet on full practice exam — set 3 for Class 7, written to the pattern of the SOF National Science Olympiad (NSO). It carries 60 marks and is designed to be attempted in 60 minutes, split across four sections — Section 1 — Logical Reasoning, Section 2 — Science, Section 2 — Science (contd.) 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 3 at Class 7 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
• Section 2 — Science (contd.) 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 50 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 1–45 carry 1 mark each. Questions 46–50 (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 Science Full Practice Exam – Set 3 (Class 7) — the PDF has the full set, and every question comes with a worked solution like these.

1. 1. What comes next in the series? 3, 6, 11, 18, 27, ____

   • A38correct
   • B35
   • C36
   • D40
   Solution: The gap between consecutive terms increases by 2 each time: 3(+3)6(+5)11(+7)18(+9)27. The next gap is 11, so 27+11=38.

2. 2. The process by which an organism obtains and makes use of food is called _______.

   • ADigestion
   • BNutritioncorrect
   • CRespiration
   • DExcretion
   Solution: Nutrition is the process of taking in and using food for growth and energy.

3. 3. Some substances lose their characteristic smell when mixed with an acid or a base. Such substances, used to test for acids and bases through smell, are called _______ indicators.

   • AUniversal
   • BOlfactorycorrect
   • CNatural colour
   • DSynthetic
   Solution: Substances such as onion or vanilla extract, whose smell changes or disappears on reacting with an acid or base, are called olfactory indicators.