Question

1. which group would be the control group in this experiment? scenario 2. some students grew sunflower plants in their school’s biology laboratory. the following table and graph show the conditions and results of the experiment after three weeks. use this information to answer the following questions. temperature humidity water light color of light plant a 21°c 50% 30 ml 10hrs. violet plant b 21°c 50% 30 ml 10hrs. green plant c 21°c 50% 30 ml 10hrs. white (normal) growth in cm. 1. was this a controlled experiment? explain your answer. 2. state a possible hypothesis for this experiment. 3. independent variable: dependent variable:

Explanation:

1. This was a controlled experiment because all variables except the color of light (temperature, humidity, water, and light - duration) were kept constant for the three plants.
2. A possible hypothesis could be: The color of light affects the growth of sunflower plants.
3. The independent variable is the color of light as it is the variable being changed. The dependent variable is the growth of the plants (measured in cm) as it is the variable being observed and affected by the independent variable.
4. The control group is Plant C since it is exposed to white (normal) light, which can be considered the standard or baseline condition against which the effects of violet and green light (on Plant A and Plant B respectively) are compared.

Answer:

1. Yes, because all variables except color of light were kept constant.
2. The color of light affects the growth of sunflower plants.
3. Independent variable: Color of light

Dependent variable: Growth of plants

1. Plant C