- Does the text begin with A, B or C?
- Click A, B or C and then look in the white box. Your score is below your answer(s).
- What comes next? Click on A, B or C again, and again, and again...
- If you don't get 100%, click 'Restart' and try again.
radiation. Life on Earth depends
When scientists warn us about
is long overdue. The flip could destroy
Back to the magnetic poles lesson.
