Science+Group+1


 * Names of Experiment Designers** (those that design the experiment):


 * Names of the Peer Reviewers** (collaborating group): Zhao Jie and Yan Jun

Bing Tian, Yanling Shi
 * Names of the Investigators** (those that will conduct the experiment):

Part 1. Design of a projectile motion experiment
A. What is your hypothesis? (You will test one variable with and without air resistance.) If we increase the angle of projection, the horizontal range would decrease.

B. Create a step by step experimental protocol to test your hypothesis using the applet at: http://phet.colorado.edu/sims/projectile-motion/projectile-motion_en.html You will test one variable with and without air resistance.

- What are the independent vs. the dependent variables in the experiment? - How will you test air resistance in the experiment after testing your initial variable? How do the two variables interact? - How many repetitions will you need to carry out within the experiment? - What data will you collect and how will you collect it?
 * In your experimental protocol you may wish to ask yourself the following:**

C. Experimental Protocol: 1. Keep the following parameters constant: i) initial speed: 25m/s ii) mass: 0.046 kg  iii) diameter: 0.043 m  2. Chang the angles of projection and measure the corresponding horizontal ranges with and without air resistance, record each group with at least six data and organize them in a table.  3. Plot the data into two curves using angle of projection as independent variable and horizontal range as dependent variable.  4. Test the validity of your hypothesis.

Part 2. Peer review of experimental protocol.
A. The peer review group should enter their comments regarding the experimental protocol below. They should ask themselves: - Is the hypothesis being careful tested? - Is the protocol easy to follow? Is it sequential? - Can the independent and dependent variables be easily identified and measured?


 * Peer Review:**
 * the hypothesis is not correct.**
 * it is easy to follow and it is sequential. However, it needs more replicates.**
 * Yes. However, we are not told how to measure the independent variables.**

B. The experimental designers should now alter the experimental protocol based upon peer review.

Part 3. Conduct the experiment.
Now a different group will conduct the actual experiment using: @http://phet.colorado.edu/sims/projectile-motion/projectile-motion_en.html

A. The investigational group should try to follow the protocol as written. Changes can be made if the protocol is not clear.

B. Data should be entered below. Tables for data can be made using the wiki. Simple graphs can be created in MS Office if time allows.


 * angle || horizontal range ||
 * 80 || 22 ||
 * 70 || 41.4 ||
 * 60 || 55.9 ||
 * 50 || 63.8 ||
 * 45 || 65.0 ||
 * 40 || 64.2 ||
 * 30 || 57.2 ||

Part 4. Results and Discussion
The investigational group should now write a short paragraph using scientific writing to explain their findings. Findings will be discussed with the group at large.

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