''SI''

123456789
Across
  1. 4. - Where it doesn't happen often
  2. 5. - where something is eroded
  3. 8. - where you are not sure what you are doing
  4. 9. - when there is a car and another car crash
Down
  1. 1. - it has a weird symbol
  2. 2. - something that someone believed was real but not real
  3. 3. - when someone breaks into your house or interrupts you
  4. 6. - something that sticks to you or something else
  5. 7. - where someone are trying to invade
  6. 8. - Something you can do in maths to tell directions