How old (1) _______you be on Friday 13, 2029? That is how old you will be when a large asteroid, called Apophis, comes very, very close to (2) ________planet. Asteroids are rocks that circle the sun in space and sometimes (3) _________close to Earth and even hit it. Most asteroids are very small and, if you are lucky, you can sometimes see (4)________ in the night sky as “falling stars”. However, most scientists (5)_________one large asteroid, about six to twelve kilometers across, hit the earth and killed all the dinosaurs about 65 million years ago. Apophis is also big. Scientists (6) ______it was (7) ___________2004 and they say that it is about 300 meters across. That’s about the size of a large sports stadium. An asteroid this size, according to scientists, is (8)__________large enough to destroy our world, but it is large enough to destroy several cities. It will probably miss the earth, they say, but not by very much – it will miss (9)________by about only 35,000 kilometers – that’s much closer than our moon which is about 240,000 kilometers away. Another way of thinking about it is that it will (10) ________us by only a few minutes.

However, most scientists believe one large asteroid, about six to twelve kilometers across, hit the earth and _____ all the dinosaurs about 65 million years ago.