Students were inquired to answer a question at school and to tell what is most important for them to succeed. One which response stood out from the rest was practice. Successful persons commonly not born successful; they become successful via hard work and determination. If you tend to achieve your goals, keep this in mind! These are are one of the answer and question example that you could simply utilise to practice and upgrade your knowledge and also give you insights that could just help you to sustain your study in school.
1. Michael put 100 red seeds, 100 brown seeds, and 100 yellow seeds in his bird feeder. He also put in his bird feeder 100 sunflower seeds that the birds normally eat in their diet. He counted the number seeds of each color that remained after 2 days. He repeated this experiment 10 times over a 20 day period. He kept the bird feeder in the same place and thoroughly mixed the seeds together. Identify in each of the following experiments:
repeated trials/sample size
Independent variable: color of the seed
Dependent variable: Number of seeds eaten
Constants: Number of seeds, location, feeder
Control experiment – Sunflower seeds that birds normally eat in their diet
Repeated trials: 10 times
The independent variable is the variable that is changed throughout the experiment. It is set to determine whether the changes made to it would have an effect on what is being tested.
- In this case, it would be the color of the seed, because it is what is being change to see if there would be a difference in seeds eaten.
The dependent variable is what does not change. The change it undergoes is not done by the experimenter, instead the change noted (if any) would be because of the independent variable.
- The number of seeds eaten or left would be the independent variable in this case because it seems to be what the experimenter wants to compare with regards to the color of the seeds.
Constants or controlled variables are variables that is set the same in all groups. This enables the researcher to rule out or prevent intervening variables or variables that may cause a change on the dependent variable. This way, the researcher would be able to determine whether it is indeed the independent variable that caused any variation or change.
- As you can see in your scenario, he ensured that the same number of seeds were placed and he set it in the same location. In addition he also put them into the same feeder.
Control group or control experiment is the group where the independent variable is not applied. This is to determine also whether it is the independent variable that made any change and it can also serve as a baseline for the experiment for comparison whether change (if any) is significant.
When it comes to experiments, repeated trials will help validate whether the results are consistent or just a fluke. It is a good characteristic of an experimental design because the scientific method requires that the experiment be repeatable for validation.
They can hopefully assist the student handle the question by using the questions and answer examples. Then might possibly make some sharing in a group discussion and also study with the classmate concerning the topic, so another student also obtain some enlightenment and still keeps up the school learning.