Man has invented four kinds of satellites. The first kind of satellite studies theof the earth . They are used to make maps . They also help countries to see where they mayoil or gold . The second kind of satellite is used to guide ships and planes. A ship or a plane cana message to the satellite , and the satellite can find outthe ship or the plane is . The third kind studies the weather. These satellitesclouds and strong winds moving across the earth. They warn countries to make preparations when veryweather is coming. kind is used for communication. Telephone callscountries can be sent by these satellites. Some can carry hundreds of calls at the same time . The call is sent to the satellite , then thesends it to a station in the country and this country is being phoned . These satellites also carry pictures. They can receive and send about eightat a time .