1.
What is the main cause of seasons on the Earth?
2.
An artificial Satellite revolves round the Earth in circular orbit, which quantity remains constant?
3.
What process involves treating rubber with sulfur to harden it?
4.
Bronze is made from what two metals?
5.
What is the name of the substance that gives skin and hair its pigment?
6.
Faraday is a unit of measurement for:
7.
A man presses more weight on earth at :
8.
Glass is made of the mixture of
9.
Which energy type depletes gradually?
10.
The xylem in plants are responsible for:
