How many dollar bills are in circulation? There are approximately 11.7 billion one dollar bills in circulation in the US, with 8.9 billion 20 dollar bills and 11.5 billion 100 dollar bills. There are about 39.8 billion notes in circulation all together. For coins, there are about 28 billion in general circulation. What are some unusual notes in circulation?
Planet Earth has an abundance of water that makes it unique and perfect for life to exist. Planet Earth has an abundance of water that makes it unique and perfect for life to exist.
The Earth has an inner core and an outer core. Scientists think that the inner core is solid and mainly made of iron. Iron is very hard â thatâs why knights used it to make their armour. The outer core is also mostly iron, but this layer is liquid (melted) iron.he crust is the part of the Earth that we walk on. Compared to the other layers, it is quite thin and breakable. You can think of the crust of the Earth as being a bit like the crust of a pie â although this crust is 5â70 km deep depending on whether you are under the ocean or on top of a mountain!