1) The 1._____ (Sun, Earth) gives heat, and a) Sun b) Earth 2) 2. _____ (Fire, Light) and it is the main source of energy on our planet. a) Light b) Fire 3) The 3. _____________ (Gravitational pull, Gravity formula) is what holds Earth and all the other planets together. a) Gravitational pull b) Gravity formula 4) 4. __________ “(Power, Electricity) can be generated from the sun's heat. It provides the earth with energy that enables humans to generate the electricity needed and to be used by many homes and establishments. a) Power b) Electricity 5) The sun also provides plants with the energy to grow and produce 5. _____ (Helium, Oxygen) for us to breathe. a) Helium b) Oxygen

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