1) a) Define fundamental unit. Give three examples 12) b) Convert one year into second. [2]
3) a) Describe an experiment to show that solid expands on
2) a) What is simple machine? Write its importance 131
b) Write three difference between heat and temperature. 31
a) What is shadow? How it is formed? [3]
b) Write two artificial and natural sources of light.12
c) Why is a clear window pane called the transparen-
How can you demonstrate the vibration of tuning fork or wat
wipples in pond? Explain with the help of diagram.[4]
substance? [2]
What is a magnet? [1]
Group 'B' |Chemistyl
Doment? Name two substance which are tastelese​