To find Nora's score at the end of Level 1, we need to account for both the points she earned and the points she lost.
- Nora earned 16 points.
- Then, she lost 25 points.
To calculate her score, we subtract the points she lost from the points she earned:
\[ \text{Final Score} = \text{Points Earned} - \text{Points Lost} \]
Substituting the values:
\[ \text{Final Score} = 16 - 25 \]
Calculating this gives:
\[ \text{Final Score} = -9 \]
Thus, Nora's score at the end of Level 1 is \(-9\) points.