Revision questions based on physical quantities and Measurement for class 7

 1. Define four fundamental quantities of measurement and mention their Si units with symbol.

2. Is it possible to measure the volume of an irregular stone by using graph paper. Justify your answer.

3. A cuboid box whose base area is 150m². It has been kept on a table of height 12m. The  total height of the table and box's top is 25m. Find the volume of the  box?

4. The density of water is maximum at 4 degree Celsius. It decreases when it is cooled from 4 degree Celsius to zero degree Celsius or it is heated above 4 degree Celsius. Is it going to to affect volume of water?explain.

5. What do you mean by liquid displacement method? How it can be used to measure relative density of a solid body?

6. why Mercury is used in a barometer as a barometric liquid instead of water?

7. The longest chord of a park is 196m. Find the perimeter of the park and then its area.

8. A truck travels for 60 minutes with a constant speed of 54 km per hour. Find the distance travelled by it? Express your answer in SI and CGS unit.

9. A a truck Travels with a speed 18 metre per second and car with a speed of 72 kmh‐1. Which travel faster and by how much?

10. Can you measure 35 cm³ of water by using a measuring cylinder of capacity 100 ml?explain it with the help of a suitable example.