Class 4 EVS Chapter 7 How Things Work – Extra Questions with Answers

Extra practice questions for Class 4 EVS Chapter 7 (How Things Work), beyond the textbook. These Class 4 EVS Chapter 7 important questions are handy for quick practice.

Very Short Answer Questions

Q1. Name one simple machine.
Ans: Answers vary; example: lever, wheel, pulley, or inclined plane.

Q2. What is the fixed point of a lever called?
Ans: The fulcrum.

Q3. Name one object that uses a wheel.
Ans: A bicycle or a cart.

Short Answer Questions

Q4. How does a pulley make lifting water from a well easier?
Ans: A pulley changes the direction of the force needed — instead of lifting straight up, you can pull down or sideways on a rope, which is often easier and allows using body weight to help.

Q5. Give one example of an object that combines more than one simple machine.
Ans: A bicycle combines wheels and axles with gears to move and change speed.

Higher-Order Thinking Question

Q6. Why might a ramp (inclined plane) be used instead of stairs to move a heavy box into a truck?
Ans: A ramp lets the box be pushed or rolled up gradually using less force over a longer distance, instead of lifting it straight up all at once, which would require much more effort.

Written by Satish

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