It depends on your model, some MacBooks only have ComboDrives (read DVD, write CD).
Look into Applications / Utilities / System Profiler > Hardware > Disc Burning and see what it does say there.
A more descriptive and precise thread title will help cater to the right audience and get you more responses. (see rule #3 under Minor Problems)
To edit your thread title, just click on the
button on the bottom right of your original post and then click the "Go Advanced" button below your message.
Have you also taken a look at MRoogle, since that question may have been asked several times?