--call on student---anyone wish to correct, clarify, or add to that?
--write on screen-- pre- before dict- to say "To say before"
Today we are not concerned with wild guesses, nor with prophets, nor with psychics. We are concerned with prediction in the scientific sense. To predict is to use all available information together with past experience to tell what will most likely happen in a particular situation.
For example: We are beginning a study of meteorology. Perhaps the most important product of meteorology is the ability to predict weather. A forecast of "80% chance of rain" means that after checking all the measurements of weather, and looking up the records of times in the past when the measurements were about the same, 8 out of 10 times rain followed.Some predictions have a 100% chance, such as, "Sunrise will be at __ tomorrow morning.
One more question before we start our lab activity. Hands please. How can we prove that a prediction was correct? Only by what did happen.Now we are going to make some predictions and test them.
Each of you will need a paper and pencil. Put your name and period number on the paper.At the signal __All students in these two rows, turn your chairs 180 to face those at the table behind you. NOW
You are now in groups of four. As I give you your group designation,
Write it at the top of your paper. A,B,C...///place group functions on screen///
One in each group will be responsible for getting and returning materials. The student on the NE of each group, raise your hand now. Under the group designation on your paper write "gofer".One in each group will be responsible for insuring that instructions are carried out as explained and demonstrated. The student on the SE of each group, raise your hand now. Under the group designation on your paper write "director".
One in each group will be responsible for seeing that every member contributes to the group effort, and within the guidelines on the screen. The student on the NW of each group, raise your hand now. Under the group designation on your paper write "coordinator".
Now speaker, if anyone in your group has a question about procedure so far, raise your hand.As soon as all instructions given so far have been carried out by your group, I want the director to hold a hand up until all groups are ready.
Good, hands down. Gofers, when I give the signal, go to the front desk and get one strip of paper and the other materials for your group. When the gofer has returned and you are ready for the next step, directors raise your hand and wait quietly. ... John, what will the gofer get? Now gofers.Procedure:
Directors, be sure your group does not use the tape until specifically instructed.
In each group, lay the paper strip flat, like so.....eyes this way.
Lift the ends to make a loop, like this....eyes. Speaker, hold the loop up so we can all see.now directors, twist one end 180 like this so the bottom is on the top. Speaker, hold the loop up again.
Now gofer, tape it. When ready for the next step I want see director's hands.
///place directions for lab on the screen///
You will each turn in a paper on which you have recorded your work. But for sharing with the class only your speaker will talk.
Now finally we are ready for the prediction:
Listen carefully to the situation. Past experience, you have cut many pieces of paper in your life time, so you know something about how scissors and paper work. Available facts, the loop of paper for you to observe. Without saying anything, take 20 seconds to examine the loop very carefully.
Now, write on your paper, a description of the loop. When all are finished I'll see directors hands.
Speaker how did you describe the loop? half twistEyes this way.... I am going to cut the loop down the middle lengthwise all the way around. Understood?
At the signal, write on your paper a description of this paper after I have finished cutting it. When everyone in your group has done that, directors raise your hand.
A, what predictions have members of your group written? ... Does any
other speaker have something different? ...
At the signal, the gofer will get a pair of scissors from the front desk. While the others help keep the loop moving smoothly, the coordinator will cut all the way around near the center of the strip. Then I will see the director's hand.
Now observe the result carefully and write as complete a description as you can. I'll look for director's hands
B, did your group's results agree with your predictions? ... Any other
Note on your paper the specific differences between your predictions and your results.Conclusion:
Now, when they ask what you learned in school, you can amaze your friends and family.
Remember, we usually learn more from predictions which are not correct than from those which are.
We will extend this activity another day.At the signal: Speaker- collect the papers from your group and place them in the turn-in box. Gofer- return scissors. Coordinator- place the paper loop in the trash can. Then all return to regular seats.