After Harry was accepted to Hogwarts in 1991, Hagrid was given the task of actually locating Harry, as Harry's uncle Vernon was doing everything in his power to prevent his nephew from receiving his Hogwarts acceptance letter.
Sucrose is a disaccharide that yeast cells convert to glucose for alcoholic fermentation. When the yeast cells produce CO 2, this gas is trapped in bubbles in a layer of foam. Your teacher will pass around a cup with a foam layer so you will know what it looks like.
Beer is generally categorized into types according to the type of yeast used during fermentation. Ales are beers that use top-fermenting yeast, while lagers are those that use bottom-fermenting yeast. The choice of yeast provides the beer different characteristics, which can alter the look and taste of the brew.