Astudent conducts an experiment to see how music affects plant growth. the student obtains four identical plants. each one is potted in the same type of soil and receives the same amount of sunlight and water each day. plant a listens to classical music for three hours each day. plant b listens to rock music for three hours each day. plant c listens to country music for three hours each day. plant d does not listen to any music at all. 2. based on the experiment in the scenario, which visual aid would be most in showing the change in the plants' heights over time? a. a pie chart b. a line graph c. a timeline d. a bar graph
C) Plant D
While the other plants are being tested on, the scientist(s) can always refer back to Plant D because there is no experimenting taking place.
C. plant D
To study how music affects plant growth, the experiment exposes several identical plants to different types of music and there is a control plant that is not exposed to any music. Plant D does not listen to any music at all.
D. Plant D
In an experimental setup an independent variable is the one which can be changed or manipulated in an experimental. The changes occurring in the independent variables likely to affect the outcomes of the dependent variable. The dependent variable cannot be manipulated but the changes occurring in the dependent variable occurs due to the changes in the independent variable. The control group or variable is the one which is used as a standard in an experiment setup to compare the changes occurring in the tested sample with respect to the application of the manipulated variables.
According to the given situation, the music is the independent variable over which the growth of the plant is dependent upon. Hence, the growth of the plant is dependent variable. The control group is the Plant D which does not listen to any music at all. This is kept in the experiment to determine weather growth of plant is dependent upon music or natural conditions such as soil, sunlight and water are sufficient.
Explanation in the experiment described in the scenario whats the variable
Plant A listens to classical music for three hours each day
Explanation:Music affect plant growth of plants through the vibrations that it creates to the sound waves.Classical music causes more pressure to the sound waves causing vigorous vibrations which is picked up by the plants speeding up the protoplasmic movement in the cells.The vibrations causes movement of the plant cells which speed up growth of the plants by stimulating the plants to produce more nutrients enabling them to germinate having more leaves,greater in size and other improved characteristics which means the plant's genetic chromosomes were changed. Also in the soil is able to produce good fungi and bacteria encouraging better root development due to healthy vines resulting to vigorous growth and better fruit.Moreover the plants are able to receive special attention and care from the farmer thus enhancing faster growth.
A line graph would more helpful showing the growth of the four plants over time. In the Y axis the height could be shown versus the time in the X axis.
C. The type of music each plant listens to.
A variable is any factor or condition whose value is changing in an experiment. A variable can occur in different types or quantity, and three types of variable (independent, dependent, and controlled) can be found in an experiment. In the experiment described above, "the type of music each plant listens to" is the variable. It is an independent variable whose value is changing because it exists in different types and it is the one that the student is observing its effect on the plant’s growth. In this experiment, this variable which differ will also produce different results (or effects).
D. A line graph
It is because in line graphs we can easily see the increase of the height of the plants over time. The result of the experiment conducted to see how music affects plant growth will be easily interpreted using a line graph.
The student obtains four identical plants. Each one is potted in the same type of soil and receives the same amount of sunlight and water each day. Plant A listens to classical music for three hours each day. Plant B listens to rock music for three hours each day. Plant C listens to country music for three hours each day. Plant D does not listen to any music at all.
D. The type of music each plant listens to
The question indicates each plant is in the same soil (so cannot be C), received the same amount of sunlight (so cannot be B) and the same amount of water (cannot be A).
However, each plant is exposed to a different type of music, one is listening classical, another rock and another country music.
So, the only variable in here is the type of music each plant listens to.