In the whole wheat bread, there is at least70 percent of the wheat germ, and since 33 percent of all plantmatter is cellulose, there is the most cellulose in the whole wheatbread. Having conducted the experiment and recorded your results properly is more essential than a correct hypothesis. The variable group you'll work with is the same foods, but they will be sealed in zipper-lock bags and placed in different areas of your home. At the end of the experiment, I helped Malik age 10 transfer the food to small bowls in order to get a better look at the mold growth. Consider all the information you may already know.
Certain molds can survive harsh conditions such as the snow-covered soils of Antarctica, refrigeration, highly acidic solvents, and even petroleum products such as jet fuel. An independent variable is a variable in an experiment that is changed to test a hypothesis. How do food preservatives affect mold growth? Then analyze your data and create your final report for the science project, telling which of the four foods grew mold the fastest. Usually when you are looking for a relationshipbetween two things you are trying to find out what makes thedependent variable change the way it does. Molds are microscopic fungi that live on plant or animal matter. Are there particular areas where you've noticed mildew or a moldy smell? These foods include breads that are left in the cupboard or on top of the counter as opposed to being refrigerated, cheeses, and fruits and vegetables that are left for long periods of time in the refrigerator or out on the counter.
Food Handling Reason Luncheon meats, bacon, or hot dogs Discard Foods with high moisture content can be contaminated below the surface. Moldy foods may also have bacteria growing along with the mold. You will watch over the food for a number of days, recording the results as you go along until the final food has molded. Cellulose is not digestible byhumans and is often referred to as 'dietary fiber' or 'roughage'. What you need to do now, before you start the experiment, is to come up with a hypothesis, or a guess about what will happen. An introduction to molds Molds are heterotrophs that do … not produce their own food like plants phototrophs.
Microbiologists recommend against scooping out the mold and using the remaining condiment. Molds form spores which, when dry, float through the air and find suitable conditions where they can start the growth cycle again. Choosing a science fair project can seem hard when you have so many from which to choose. Use the notes from your journal to chart the progression of the mold on graph paper. Cut off at least 1 inch around and below the mold spot keep the knife out of the mold itself so it will not cross-contaminate other parts of the produce. In some cases, toxins may have spread throughout the food.
Molds have branches and roots that are like very thin threads. By: Riya Jegajeevan Hypothesis For my hypothesis, I think that the cheese would mold the fastest. In order for a banana to ripen sweeten up it must be picked from the tree. Even though you can see through the jars in the beginning of the experiment, you may not be able to identify the food once it begins to mold! Borax was the fastest growing crystals, while the brown mold because it will contain the largest amount of preservatives. In your experiment, you'll be working to determine which foods molds grow best on, and in which environments. Aflatoxins are considered unavoidable contaminants of food and feed, even where good manufacturing practices have been followed. If you took photos, the combination of the graph and the photos make a nice display for a science fair.
Yes, some molds cause allergic reactions and respiratory problems. Keep dishcloths, towels, sponges, and mops clean and fresh. Other cheeses have both an internal and a surface mold. Step 2: Research We spent quite a bit of time at the library and online, seeking answers as to why certain foods might mold faster than others, and defined what exactly mold is. The prevention of aflatoxin is one of the most challenging toxicology issues of present time. The conclusion should explain whether your original hypothesis was correct or incorrect and why.
If surface mold is on hard cheeses such as Gorgonzola and Stilton, cut off mold at least 1 inch around and below the mold spot and handle like hard cheese above. Any other use of these materials without prior written authorization is not very nice and violates the copyright. Make sure no other food is stored with your test samples in the cabinet. Cooked leftover meat and poultry Discard Foods with high moisture content can be contaminated below the surface. Indoors, they can be found where humidity levels are high. The internal dampness of a type of bread is a major determining factor in neutral environments, so the more light and moist a slice, the sooner it shows growth. Molds have branches and roots that are like very thin threads.
See also: ; Unlike bacteria that are one-celled, molds are made of many cells and can sometimes be seen with the naked eye. For further information, consult your state's handbook of Science Safety. Most are filamentous threadlike organisms and the production of spores is characteristic of fungi in general. In dangerous molds, poisonous substances are often contained in and around these threads. It's just a piece of bread. And then you notice that the cheese is covered with little white spots. Which food will grow mold fastest? Breads The timing in which bread molds has a lot to do with the water content.