Flux capacitors. Preferably big ones.
An atom that gains or loses valence (outermost shell) electrons is referred to as an ION.
Laser paint contains a phosphorescent pigment. When UV or light falls on the pigment the energy is stored and released again over time, causing the 'glow'. The laser emits the energy, and it does so in an extremely narrow beam, making it possible to 'write' with it.
* Why is the sky blue? * What causes wind? * How does evaporation change the air temperature?
You can't fly in a vacuum! Air pressure is what keeps an airplane or a bird in flight.