The electromagnetic spectrum is made up of a: sound waves and light waves b: only light waves that you can see c: light waves you can see and waves of higher energy radiation d: light waves you can see and waves of both higher and lower energy radiation

the core of the sun is so hot and there is so much pressure, nuclear fusion takes place, hydrogen is changed to helium. nuclear fusion creates heat and photons. when the heat reaches the earth it warms the molecules of the atmosphere, and they warm other molecules and so on.