CHEMISTRY OCTOBER 27, 2014 Debriefing Lab 04. Science Starter You have 2 minutes. You are silent and seated. Answer the following questions: – 1. What.

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Presentation transcript:

CHEMISTRY OCTOBER 27, 2014 Debriefing Lab 04

Science Starter You have 2 minutes. You are silent and seated. Answer the following questions: – 1. What did Rutherford discovered? – 2. What is the charge of the nucleus? – 3. Given the carbon element: What is the atomic number What is the number of proton

IMPORTANT DATES Lab - Thursday

OBJECTIVE SWBAT – Simulate Rutherford’s gold foil experiment and employs indirect observations to analyze and determine the size and shape of an object.

AIM How can indirect observations be employed to determine the size and shape of a hidden object?

Lab Review Roll the jawbreaker under the cardboard 20 times in each side to determine the shape and size of the hidden objects Draw the path on the white page to identify the path the jawbreaker travel Form a hypothesis to help formulate the shape Create the steps for validating the hypothesis

POST LAB 1. Draw the general size and shape of the target to approximate scale in the box below. 2. The speed of the marble rolls was an uncontrolled variable in this activity. How would the outcome of the scattering test have been different if the marble speed had been faster or slower?

Post Lab Questions 1 Compare your experiment to the Rutherford Experiment (look at the Gold Foil summary above in the pre-lab section). What do the marbles, unknown object and drawn paths represent?

Post Lab Question 2 Was your hypothesis correct? Why or why not? Explain in 2-5 sentences.

Post Lab Question 3 How did you use indirect observations to make the determination of the size and shape of your hidden object? Explain in 2-5 sentences.

LAB PARTNER REVIEW On page 1 is the lab rubric section. Please make sure each lab member, write their name and give you 1-20 points. Then take a few minutes to reflect on how you think you perform for this lab.