Sometime billions of years in the future, he predicts, the core and mantle could cool and solidify enough to meet the crust. If that happens, Earth will become a cold, dead planet like the moon. Long before such an occurrence, however, the Sun will likely have evolved into a red-giant star, and grown large enough to engulf our fair planet.
The term increment is occasionally used in physics and engineering to represent a small change in a parameter such as temperature, electric current, visible light intensity, or time. Also see Mathematical Symbols.
Down payment. Down payment (or downpayment) is a payment used in the context of the purchase of expensive items such as a car and a house, whereby the payment is the initial upfront portion of the total amount due and it is usually given in cash at the time of finalizing the transaction. A loan or the amount in cash is then required to make the full payment.