Sugar is your brain's preferred fuel source -- not table sugar, but glucose, which your body processes from the sugars and carbs you eat. That's why a glass of OJ or another fruit juice can offer a short-term boost to memory, thinking, and mental ability.
Best Answer: Technically each cardinal phase (First Quarter, Full, Last Quarter and New) are all momentary events. They occur at specific times and then pass immediately. A better way to ask the question is to ask how much time passes BETWEEN each phase. The answer to that question is 29.5 / 4 days. 29.5 days is the number of days that it takes for the moon to cycle through it's phases (called the synodic month)... The interstitial phases (Waxing Cresent, Waxing Gibbous, Waning Gibbous, and Waning Cresent) also last 29.5 / 4 days each...
So, how long does each phase of the Moon last? Well, the phases are just names we give to certain points along the Moon's smooth path around Earth. Technically, each phase, just like the one called a New Moon, when the Moon is exactly between Earth and the Sun, lasts only a brief instant. But to our eyes, a New Moon can last for a few days, representing the time that the Moon appears in the sky too near the Sun's position for us to see it at all. The time it takes the Moon to go through all its phases is about a month, and that was so important to our ancestors that they created the period of time we call a month.