Matter Force and Energy (Class 4)

What this worksheet covers

This is a fifteen-question practice worksheet on matter, force and energy for Class 4, written to the pattern of the SOF National Science Olympiad (NSO). It carries 21 marks and is designed to be attempted in 40 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 matter, force and energy at Class 4 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 15 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 1–12 carry 1 mark each. Questions 13–15 (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 Matter Force and Energy (Class 4) — the PDF has the full set, and every question comes with a worked solution like these.

1. 1. Which state of matter has a definite shape as well as a definite volume?

   • ASolidcorrect
   • BLiquid
   • CGas
   • DNone of these
   Solution: In a solid the particles are packed tightly in fixed positions, so it keeps its own shape and volume. A liquid keeps its volume but takes the shape of its container.

2. 2. A ball rolled across a carpet stops sooner than one rolled across a smooth marble floor. Why?

   • AThe carpet is softer, so the ball sinks
   • BGravity is stronger on carpet
   • CThe marble floor is colder
   • DThe rough carpet produces more frictioncorrect
   Solution: Friction is greater between rough surfaces, so the rough carpet produces more friction and takes away the ball's energy of motion faster, stopping it in a shorter distance.

3. 3. Consider the following statements.(i) Friction is always harmful and should be removed completely.(ii) Gases can be squeezed into a smaller volume because their particles are far apart.(iii) Energy can be changed from one form into another but never created.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 — friction wastes energy, but without it we could not walk, write or use brakes. Statements (ii) and (iii) are both true; a gas is mostly empty space, which is why cooking gas can be stored compressed. Hence (ii) and (iii).