SCIENCE
PHYSICAL SCIENCES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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changes in temperature
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species of bacteria
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growth of bacteria
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kind of agar (sugar) used to grow the bacteria
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Detailed explanation-1: -The dependent variable is the number of colonies. This is what we are measuring (counting) and it depends on the temperature.
Detailed explanation-2: -Independent variable: time under UV light Dependent variable: number of bacteria that die 2. If bacterial growth is affected by temperature, raising the temperature will result in an increase in bacterial growth.
Detailed explanation-3: -Bacterial growth may be affected by temperature. Temperature is independent and bacterial growth is dependent. If the temperature changes then it will affect bacterial growth. Ultraviolet light may cause skin cancer.
Detailed explanation-4: -In general, the higher the temperature, the more easily microorganisms can grow up to a certain point. Very high and low temperatures both obstruct the enzyme processes microorganisms depend on to survive.
Detailed explanation-5: -Controlled Variables: same amount/type of nutrients (agar), same. temperature, same amount of light, same time the bacteria is allowed to. grow, same amount of bacteria in each quadrant, sterilization of the air and. equipment before touching the bacteria.