It is what makes his or her job (2) ________.

It will probably miss the earth, they say, but not by very much – it will miss us by about only 35,000 kilometers – that’s much closer than our moon (5) _________ is about 240,000 kilometers away.

An asteroid this size, (4) ______ scientists, is not large enough to destroy our world, but it is large enough to destroy several cities.

However, most scientists believe one large asteroid, about six to twelve kilometers across, (3) _______ the earth and killed all the dinosaurs about 65 million years ago.

Asteroids are rocks that circle the sun in space and sometimes come (2) ________ Earth and even hit it.

How old (1) _______ you be on Friday 13, 2029?

Teens don’t have much respect for their parents if neither of them actually does things (5) _______ they expect their children to do.

Teens need (4) ________ rules but they have to be clear and unchangeable.