Complete the clues and find the word in the shaded box.
3
5
8
1 When did Copernicus
the solar system?
2 I think it was
1543.
3 The end of the Berlin Wall was a major
4 Why do people want to space?
5 In which were computers developed?
6 Zuse invented the first computer in twentieth
century.
7 What do you think was an important event in
8 What happened 11 September, 2001?
?
9 When did men first
on the moon?