I know selling your projects in another website is allowed, but what if you use one or two of their sounds? The only ones I used are Emotional Piano loop, and the Coin effect.

Per the Terms of Use:

Terms of Use wrote:

5.2 Scratch provides support materials, including images, sounds, video, and sample code, to help users build projects. Support materials are licensed under the Creative Commons Attribution-ShareAlike 2.0 license.

This means that the sounds in the Scratch sound library — either originating on Scratch or from elsewhere — are “copyrighted” under the Creative Commons Attribution-ShareAlike 2.0 license (the same license that allows anyone to remix your stuff). So you are allowed to use them in projects posted on another website, as long as you abide by the terms of the Creative Commons license (e.g. credit Scratch).

Za-Chary wrote:

(#2)
Per the Terms of Use:

Terms of Use wrote:

5.2 Scratch provides support materials, including images, sounds, video, and sample code, to help users build projects. Support materials are licensed under the Creative Commons Attribution-ShareAlike 2.0 license.

This means that the sounds in the Scratch sound library — either originating on Scratch or from elsewhere — are “copyrighted” under the Creative Commons Attribution-ShareAlike 2.0 license (the same license that allows anyone to remix your stuff). So you are allowed to use them in projects posted on another website, as long as you abide by the terms of the Creative Commons license (e.g. credit Scratch).

Oh, okay! that was a nice and quick answer!