Here's how to convert it:

1. Move the decimal point to the right until you have a number between 1 and 10. In this case, we move the decimal point 7 places to the right, resulting in 6.73.

2. Count the number of places you moved the decimal point. We moved it 7 places.

3. If you moved the decimal point to the right, the exponent is negative. If you moved it to the left, the exponent is positive. Since we moved the decimal to the right, the exponent is -7.

Therefore, 0.000000673 in scientific notation is 6.73 x 10⁻⁷.