General

Follow directions in the assignment.  Often, guidelines include:

Include 1-inch (2.5 cm) margins on all sides.

Use standard 11 or 12 point font (e.g., Times, Times New Roman, Arial, etc.).

Double space.  Do NOT include any additional spacing before or after paragraphs.

Number your pages in the bottom right corner.

Include the title and authors at the top of the first page of your paper.  Do NOT include a title page.

Tense

Because you have completed the experiment by the time you write it up, your paper should be in the past tense.

Passive vs. active voice

In the past, most scientific papers required use of passive voice.  However, many now use active voice.  Check with your professor to determine the approach for your assignment.