8TH STANDARD PRACTICE QUESTIONS

Q1. Student is given the following apparatus in order to find the density of a piece of rock.
         metre rule , pan balance , measuring cylinder that is big enough for the piece of rock 
       to fit inside and water.
       Draw a labelled diagram of apparatus from this list set up so that the student is able to 
       find the density of the stone.
       also describe the method .


Q2. A scientist needs to find the density of a sample of rock whilst down a mine. He has only a
spring balance, a measuring cylinder, some water and some thread.
(a) In the space below, draw two labelled diagrams, one to show the spring balance being
used and the other to show the measuring cylinder being used with a suitable rock
sample.

(b) The spring balance is calibrated in newtons. State how the mass of the rock sample
may be found from the reading of the spring balance.

Q3.What do u mean by
                                     i) Mass
                                    ii) Weight
Q4. What is the difference between mass and weight?

Q5. A cycle rotate approximately 100 rotation per minute. Describe carefully how a stopwatch may be used to find the time for one rotation of the cycle.

NOTE : All the above questions are based on CIE past papers .
              Try to Solve the above questions.