absorbing sunlight causes objects to heat & if something is outside during the day then that something will receive sunlight ->  if something is outside during the day then that something will be heated by absorbing sunlight  if something is outside during the day then that something will be heated by absorbing sunlight & cars are parked outside during the day ->  cars parked outside will be heated by absorbing sunlight  cars parked outside will be heated by absorbing sunlight & sunlight is a kind of light ->  cars parked outside will be heated by absorbing light  a shiny aluminum screen is placed on the car & shiny things reflect light ->  a shiny aluminum screen on a car will reflect light away from the car  cars parked outside will be heated by absorbing light & a shiny aluminum screen on a car will reflect light away from the car & if light is reflected, then the light is not absorbed ->  cars with a shiny aluminum screen will reflect the sunlight and not absorb the sunlight  cars with a shiny aluminum screen will reflect the sunlight and not absorb the sunlight & if an object does not absorb the sunlight, then the object can stay cool -> cars with a shiny aluminum screen can stay cool by reflecting the sunlight