What is the effect of day length on plant growth? Hypothesis: Plants will grow more when the day is longer. Describe the experiment you would use to test the hypothesis. Be sure to include variables as well as experimental and control groups.

In which research method does a researcher change the value of one variable to determine how the change affects another variable? a. experiment b. observational research c. survey d. case study

Psychologists studying infant memory want to determine at what age babies can remember specific events. an experimenter uses several puppets to demonstrate a series of actions while the infant watches. after a delay, the experimenter records how many of the actions the child imitates when playing with the puppets. what is the dependent variable?

Which of the following events most directly contributed to the establishment of israel as a nation