Scientific Method (5th Period)

According to the graph, the value of Sarah's car did not increase between 2001 and 2007.

The diagram shows that when sunlight is present, the onion bulb sprouts and grows healthy leaves. However, when sunlight is no longer available, the leaves wilt and wither. This supports the hypothesis that the leaves require sunlight to remain healthy. Therefore, the correct answer is true.

The dependent variable in scientific research refers to the factor that is being measured or observed in order to understand the impact or influence of one or more independent variables. It is the variable that is expected to change or be influenced by the independent variables. Therefore, the statement that the dependent variable is measured to learn the effect of independent variables is true.

The correct answer is False. The reason for this is that the dependent variable in the graph is not specified. The graph could be showing the concentration of any substance other than tyrosine, or it could be showing a different variable altogether. Without further information, it is not possible to determine the dependent variable from the given graph.

The given statement is an example of a hypothesis because it presents a proposed explanation or prediction that can be tested through observation or experimentation. It follows the format of an "if-then" statement, stating that if the outdoor temperature decreases to 32 degrees Fahrenheit or colder, then the lake will begin to freeze because water freezes at 32 degrees Fahrenheit. This hypothesis can be tested by observing whether the lake actually freezes when the temperature reaches 32 degrees Fahrenheit or colder. Therefore, the answer is TRUE.

The independent variable in this scenario is the combination of knowledge of the position, attitude toward residential policies, and the ability to handle conflicts. These factors are being assessed by the director as potential predictors for commitment to the position of resident assistant. The director wants to determine if having a certain level of knowledge, a positive attitude towards policies, and effective conflict resolution skills can predict whether a resident assistant will stay in the position for at least 2 years.

The independent variable in this study is participation in the intensive study program. The study aims to investigate the impact of this variable on the graduation rates of at-risk high-school seniors.

The dependent variable in this study is the graduation rates. The study aims to determine if there is a statistically significant difference in graduation rates between at-risk high-school seniors who participate in the intensive study program and those who do not. The graduation rates are the outcome that is being measured and compared between the two groups.

The independent variable in this experiment would be the addition of iron to the growth solution. This is because the company wants to test if adding iron to the formula will have an effect on lettuce growth. The growth solution is the variable that is being manipulated or changed in order to observe its impact on the lettuce growth.

The height of each plant is the dependent variable in this experiment because it is the variable that is being measured and is expected to change as a result of the different concentrations of salt water solution. The independent variable in this experiment is the concentration of salt water solution, as it is being manipulated by the researcher. Qualitative data refers to non-numerical data, which is not relevant to this experiment.