Which type of clock is used as a receiver in GPS ?
Quartz clocks are used as receivers in the case of the Global Positioning System
Differentiate between GPS and GIS.
GIS stands for Geographical Information System. It is a tool (both software and hardware) which are used for managing and using geographic information, whereas GPS (Global Positioning System) is a satellite-based location tracking tool. GPS is actually a part of GIS.
What is Remote Sensing ?
It is the art and science of acquiring information about an object and phenomenon from a distance without making any physical contact with them. There are two types of remote sensing: Active and Passive remote sensing
Differentiate between Active and Passive remote sensing.
Active remote sensing operates on its source of emission and light whereas Passive depends upon the reflected ones.
Give some applications of GIS.
Management of resources, Environmental Impact Assessment, Urban planning, investigation of earth's surface are few applications of GIS.