Moisture, Heat (Between 40 and 140F), oxygen and a catalyst - usually a food source. more commonly - any food source that has the correct Ph balance.
WARMTH, FOOD, LIQUID, TIME
In order for bacteria to multiply, they need warmth, moisture, food and time. There is no definitive answer as to how fast bacteria multiply since different bacteria grow at different rates. However, given the right environment, some bacteria can start to multiply immediately.
bacteria need to be at the right temperature to multiply (room temperature) which is why we freeze/cook food, temperatures that are to hot and too cold kill the spores (bacteria) and therefore kill them
The four basic elements for bacteria to grow are a food source (nutrients), moisture (water), a suitable temperature, and a favorable environment (pH and oxygen levels). Without one or more of these elements, bacteria may not be able to thrive and reproduce effectively.
Its when Microbes(bacteria and fungi) grow on food causing it to decay and rot.They will multiply while on the food.
sand, water, dirt, snow.
You certainly could. There is bacteria in meat and if it is left out in warm temperatures that bacteria will grow and multiply making it even easier to get sick from it.
Three things that make bacteria grow are a suitable environment (temperature, pH, and nutrients), water for metabolic processes, and time for cell division and proliferation.
Bacteria grows slower at colder temperatures. In room temperature, the bacteria will multiply quickly and create mold, but at lower temperatures, the bacteria grows slower, or wont even grow at all.
Food pisoning is most often caused by toxic substances that bacteria found in food produce. The bacteria have grown and multiplied in the food, most often if the food is stored at a certain temperature that must not be too low or too high. The toxins are sometimes produced when the bacteria grow and multiply in the food before eating it. Other times the bacteria produce the toxins when they grow and multiply further inside the stomach and intestines after the food has been eaten.
All bacteria grow and reproduce
fungi and bacteria grow from spores.
The most common way to grow bacteria is in an agar petri dish. The bacteria are usually placed by a swab into the petri dish and incubated for a predetermined period of time (The agar serves as a food source for the bacteria). Then, growth, or no growth, of bacteria will be observed.