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Context This question explores the movement and spread of germs, specifically bacteria like Salmonella and viruses like influenza. It considers two scenarios: the spread of Salmonella between two pieces of raw chicken and the spread of influenza virus between two straws. The core question is whether germs actively 'crawl' from one location to another or if direct contact is necessary for infection. The question highlights the misconception that germs are mobile creatures like insects, which is not scientifically accurate. Simple Answer Germs don't have legs; they don't crawl. They spread through contact or through the air. Bacteria multiply by dividing, increasing their numbers on a surface. Viruses need to come into contact with a host (like a person or cell) to infect. Indirect spread happens when germs are carried by things like air currents or people touching surfaces. Detailed Answer The idea of germs 'crawling' is a misconception. Bacteria and viruses ar...

Context This question explores the safety of consuming raw flour versus raw vegetables. The query highlights the apparent contradiction of eating raw vegetables like lettuce and cabbage, which are exposed to the same environmental factors as wheat, without any apparent ill effects. The question then focuses on the specific risk associated with raw flour and seeks to understand why it is considered unsafe for consumption. Simple Answer Raw flour can contain harmful bacteria like E. coli, Salmonella, and others. These bacteria can cause food poisoning and make you sick with symptoms like diarrhea, vomiting, and fever. Raw vegetables are typically washed before being eaten, removing most bacteria on the surface. Flour is not usually washed before consumption, so any bacteria present remain. Cooking flour kills these harmful bacteria, making it safe to eat. Detailed Answer The perception that raw flour is unsafe while raw vegetables are safe stems from the difference in handling and proces...