Experiment+Analysis

Experiment Analysis

Compose a hypothesis for each of the experiments describes. Based on you hypothesis, indicate the manipulated and responding variables in each. Also indicate controlled parameters your experiment should have.

A group was researching the effects of elevator music on chimpanzees. Each chimp was provided an isolated room complete with a chair, a tire swing, and a climbing tower. The only noises that could be heard in Room A were those made by the chimp residing in that room, Rosie. Bob, the chimp in Room B, had the exact same set-up as Rosie, except that Bob had to listen to elevator music for the entire period he was in the room. The chimps spent 6 hours a day in their respective rooms for 30 straight days. At the end of the 30 days, Rosie seemed unaffected by her “no music” environment. On the other hand, Bob became more aggressive and had learned to stick bananas in his ears.
 * Experiment #1 **

a. Hypothesis:

b. List the independent variable.

c. List the dependent variable.

d. List at least 3 controlled parameters.

During the 1600’s people thought that the heavier an object was the faster it fell. Galileo, a famous mathematician discovered that this belief about falling objects was false. Instead, he theorized that all fall at the same rate regardless of weight. To prove his hypothesis, so it is said, Galileo took two cannonballs to the top of the Leaning Tower of Pisa. Both balls were spherical, but one was heavier than the other. With a crowd of on lookers, Galileo dropped the two cannonballs at exactly the same time from the same height. Galileo repeated this experiment with cannonballs of various weights, but they would all hit the ground at the same time. This event set the stage for Isaac Newton’s interpretation of gravity in the following century.
 * Experiment #2 **

a. Hypothesis:

b. List the independent variable.

c. List the dependent variable.

d. List at least 3 controlled parameters.

Wendy McDonald, a biochemist, thought she had discovered a vaccine that could “cure” the common cold. To test her vaccine, Wendy drafted 50 people for her study. She split these people into two groups and labeled them Group A and Group B. Both groups had 25 people with equal numbers of males and females. Both groups also had the same age distributions and ethnic backgrounds. On Day 1 of the study, Wendy gave Group A her vaccination for the common cold. Group B was given a placebo, a shot without any actual medicinal value. None of the 50 test subjects knew if they had received the vaccination or placebo. Wendy monitored the health of her test subjects over the course of a year. She found that 23 out of 25 people in Group A did not have a cold for an entire year. On the other hand, only 3 people out of 25 in Group B did not have a cold. Initial results of Wendy’s cold vaccine looked promising.
 * Experiment #3 **

a. Hypothesis:

b. List the independent variable.

c. List the dependent variable.

d. List at least 3 controlled parameters.

Jed I. Master did a study ofnt he reactivity of a newly discovered acid, glitbiter acid. In each of five test tubes, Ken placed 25 milliliters of glitbiter acid and labeled them Samples A through E. Next, he placed various amounts of water in each of the test tube with the glitlbiter acid: 5 milliliters in Sample A, 10 milliliters in Sample B, 15 milliliters in Sample C, 25 milliliters in sample D, and 25 milliliters in Sample E. Ken then placed 10 milliliters of an indicator solution into each of the five test tubes. After placing the drops in Sample A, he noticed that the acid had become a dark purple color. In Sample B, the indicator solution turned the acid more of a pink color. No changes occurred in Samples C or D. But after adding the indicator solution to Sample E, the acid turned blue and Ken could distinctly hear “We are the Champions,” a song by Queen, coming from the test tube.
 * Experiment #4 **

a. Hypothesis:

b. List the independent variable.

c. List the dependent variable.

d. List at least 3 controlled parameters.

Created by Jason E. M. Schmit