Hot air rises because warm air is lighter than cold air. Similarly, warm water is less dense than cold water. When the cold water bottle rests on top of the warm water, the less dense warm water rises to the top bottle and the cold water sinks causing all the mixing you see happening, turning all of the water green. However, when the bottle of warm water is placed on top of the cold water, the more dense cold water stays in the bottom bottle and the less dense warm water is confined to the top bottle.
The movement of warm and cold water inside the bottles is referred to as the convection current. Convection currents in the atmosphere are responsible for the formation of thunderstorms as the warm and cold air masses collide. Many different weather phenomena occur because of convection.

Photographer Mark Arbeit moved to Oahu when he was 16 years old from northern California. Inspired by the light and by what he called "paradise on earth," Arbeit launched his prolific career. From fashion shoots to celebrity portraits, Mark's work has been featured in Forbes magazine, Vogue and InStyle, just to name a few. He joins us in studio this morning.

Soaring gas prices, airline woes and of course, the presidential race. They're all important news stories, but maybe you're tired of hearing about them. Maybe you need a distraction. Maybe that's why America is so obsessed with Brangelina and their newly born twins. Vivienne Marcheline and Knox Leon. But have we gone overboard? I mean a magazine spent $10 million for their pictures. Well let's bring in the panel of "experts" to weigh in.

Hydrogen peroxide (H2O2), decomposes (breaks down) over time into H2O (water) and O2, oxygen. Potassium iodide (KI) acts as a catalyst to this reaction, meaning it speeds it up. So when the KI solution is added to the hydrogen peroxide, oxygen gas is given off, creating the bubbles. The amount of hydrogen peroxide available determines the rate of reaction.

Club Monaco's first store in Hawaii opens in Ala Moana Center's Nordstrom wing.