Earth is approximately spherical in shape like all planets and stars. Earth is composed mostly of rock. Three-fourths of its surface is covered by a relatively thin layer of water (some of it frozen), and the entire planet is surrounded by a relatively thin blanket of air.
It is more cost effective to work at home but you will have more focused at the gym rather than working out at home because if you're at home sitting on the couch you most likely won't want to get up and work out but if you force yourself to go to the gym once you already there you will work out more in focus more and you have more options for exercising at the gym since there are more machines
