Some people get confused by the word Scene and think it means Chapter. As a reader, we don't see the scenes as such. We only notice the space between scenes as a chance to maybe put the book down. Chapters, however, are different. We see them in every book we read, conveniently named and numbered. I think that's why people get confused. As readers they're used to thinking in chapters, not scenes.
A scene is a chunk of writing within the overall story that is a complete bit on its own. Often it's contained within a specific location, or time span, but it always contains an event. Using the 3 Little Pigs as an example, when the 1st little pig starts and finishes building a house made of straw, that's a scene. Another scene is when the 2nd little pig starts and finishes building a stick house. Another scene is when the 3rd little pig starts and finishes building a brick house.
A scene might be a few words, or a few thousand words long - or even longer, although it's unlikely to be much more than that. Most scenes are probably between 500 and 2000 words, and the average novel probably has between 50-80 scenes. In a manuscript you show them by leaving a space between each chunk of text. (This is why it's so irritating when a ms is given academic presentation ie spaces between every paragraph, and no indentation of the first sentence of each new paragraph. This post follows academic presentation, your novel shouldn't.)
Chapters are usually between 1000-6000 words long, although they also could be only a few words long, or tens of thousands. Novels generally have between 10-30 chapters.
Scenes are all about the story telling. Chapters are all about manipulating the reader experience. Long chapters, and the pace feels slow. Short chapters, and the pace picks up. Where you put your chapters is very important, especially where they end. You want a reader to feel that they simply have to carry on reading. Consequently, although a chapter may neatly contain several scenes, the chances are that you'll cut the final scene to make it have an interesting chapter ending that compels the reader to start the next chapter.
A chapter is more likely to contain several scenes, but it could be made up of just the one. I think this is where the confusion comes. While a Scene may also be a Chapter, and a Chapter may be a Scene, they are two different things and have two different functions. As a reader you think in chapters, but as a story teller you want to think in scenes.