The network of parallels and meridians is called the 

The reference line for measuring east-west distances

The imaginary line midway between the two poles

The equator is regarded as the __________ latitude.

Which among the following is drawn around the center of the Earth ? 

Which among the following is a man made model of the Earth ?

The instrument used to determine the angle of inclination of the sun in the sky during mid day.

The point at the top is called 

The point at the bottom is called