Lab Mar… · Web viewA word you need to watch out for is “revolutions”. You should really...

Block: 7/8 Date: 4/2/04 Prepared By: Luara, Daniel, Yodit

Comments Mark (?/3)

ObjectiveState what you are trying to do or discover.

Great. 3

HypothesisAt this point, make an educated guess as to what you think the outcome will be.

Groovy stuff. 3

EquipmentList the equipment you will be using. You do not have to list things like your pencil and ruler. Sometimes a diagram will be enough.

Groovy again! 3

ProcedureOutline the main points of what you will be doing. Use point form and be brief.

Wow, you actually have written a proper lab report! 3

Pre-Lab QuestionsSometimes there may be some questions you are supposed to answer before starting the lab. Answer those questions here.

Not applicable N/A

ObservationsQuantitative measurements must be organized in a table. Qualitative measurements can be written in point form. Do not make rough copies or erase mistakes. Instead, cross them out neatly.

You should label the charts with trial numbers, so if someone wanted to question you about a specific trial they could bring your attention to it by number. It’s a pretty minor detail, though, since your charts are otherwise very clear. P.S. What is that supposed to be a picture of in your Qualitative Observations… freaky stuff!

3

AnalysisExplain what your observations mean. Answer any questions in full sentences. Show any calculations that you use (this is where you do your “number crunching”).

Good job here. You might want to label the first few sections as things like “Average Period” or something, since right now a person has to assume what you were doing in each step.

3

Sources of ErrorList them clearly and be specific. Calculate percentage error or difference if applicable.

Groovy. 3

Concluding StatementTie everything up here... discuss your objective, observations and analysis in order to come to some conclusion. Use full sentences, but be brief.

Good conclusion. Another thing you might want to consider to get more accurate results is to increase the number of swings it did. More swings should lessen the timing errors.

3

QuestionsAnswer any questions that were assigned for after the lab.Two marks each.

I’m not sure why you say that it would be difficult to get the pendulum to stay at a 20º angle on the moon.

3

Overview & SummaryYou only lose one mark on question #1 because of your statement about the angle being difficult to maintain. But, you make it back on the bonus mark for a PowerPoint presentation. Great work!

Final Mark28/28

Pendulum Lab Mark Sheet

Block: 5/6 Date: 4/2/04 Prepared By: Raymond Cody Ryan

Comments Mark (?/3)


Great. 3


I’m a bit confused… you’re making an “educated guess” that is different from the value that you say you know is the acceleration of gravity, but for no given reason. Also, you don’t give the units for any of your values.

2


Groovy. 3


A word you need to watch out for is “revolutions”. You should really only use that word for something making a complete circle. A pendulum “swings”. Also, if you’re going to use roman numerals to number your steps, you should sue roman numerals if you talk about a step in the procedure itself.

2


Not applicable N/A


A period if the time for one swing, so the number you are showing here with no explanation would be assumed to be the period for one swing. You should label that column the “Time for Five Swings”, and then maybe have a period column next to it.

2


Although this is not an English class, part of writing a lab report must be communicating your ideas correctly. I appreciate the explanatory paragraph at the beginning of the Analysis section, but some of your grammar is questionable or confusing. You might want to re-read it.

2


You should never make a general statement like “there could not have been any other source of error”. In fact there were likely several other sources of error that occurred. It is possible that some of them shifted your value slightly higher, while others brought it down. Read the definition for “hubris” in a dictionary and you might understand why this sort of attitude could be bad for a scientist.

1


Good concluding statement. 3


Where are the answers to your two questions? 0

Overview & SummaryYou have a well laid out lab here, with a few errors that can easily be fixed. Try to avoid definitive statements in a lab when you might not know the full scope of your statements.

Minus one mark for forgetting names on assignment.Plus one mark for PowerPoint.

Final Mark18/28


Block: 5/6 Date: 4/2/04 Prepared By: Nasab Jessica

Comments Mark (?/3)


Great. 3


“we will shorten the string ever 5 trials” You should tell me what each value of your formula is, as well as the units it’s measured in.

2


Groovy. 3


You might want to also mention that you repeated the steps several times to get several trials.

3


Not applicable N/A


Fantastic! Did you know you could also have highlighted all of this on your Excel spreadsheet and used cut and paste to put it in your presentation? Just something to consider for next time.

3


Groovy stuff. One small mistake is that you started talking about error in the analysis section. You should only talk about that in the error in the next section.

3


Next time give the sources as a point form list instead of a paragraph. Round off your percent error, since you wouldn’t be able to give an answer with that many sig digs… an Excel spreadsheet just gives a whole bunch of extra decimal places.

2


The conclusion comes first, then your questions at the end. Make sure you round off the numbers a bit more here also.

2


#1: It has nothing to do with tension in the string. 3

Overview & SummaryGood lab!Bonus mark for Powerpoint.Bonus mark for Excel spreadsheet.

Final Mark26/28


Block: 5/6 Date: 4/2/04 Prepared By: Vanessa, Lindsey

Comments Mark (?/3)


Great. 3


Groovy stuff. 3


Groovy again! 3


Ok, I think I can follow this… 3


Not applicable N/A


Good stuff. The one thing I wonder about is the rather broad range of values you have for T, all the way from 1.12 to 1.26s. I know we’re talking about tenths of a second here, but that is a rather large range. Curious.

3


The number seems a little high, but we’d already talked about that. Now that I see your numbers in the observations makes me wonder if something might have happened in some of those trials.

3


Ok, that would explain the high error. Any ideas how you might be able to better control these factors if you did it again? Maybe you could try to identify what you think are the top three and try to control them a bit more, right?

3


This would have been a good spot to carefully list some specific things that you could change in the lab to get more accurate results.

2


Good job. 4

Overview & SummaryI know you are a little disappointed in your percent error, but we’ve already discussed that. In the conclusion it would be a good idea to include some ideas of how to get those errors under control… be more specific in your recommendations. Anyone can say “Next time I’ll be more careful,” but how?

Final Mark27/28


Block: 5/6 Date: May 8 Prepared By: Jen, Janelle, Nicole

Comments Mark (?/3)


Ok, but you don’t have to mention how you’re going to do it. 3


You don’t say what the “actual” value is, and you didn’t give me the formula you used for your calculations.

0


Groovy 3


You should say exactly how many times to swing the pendulum. Also, why do I have to go right back to the beginning to cut another piece of string to do the lab again?

2


Not applicable N/A


I think what you are trying to show is that you timed it for four swings, and then calculated the time for one swing. This is a very misleading way, since it looks you timed it for one swing and four swings separately. Also, at the bottom, it is not average speed. Those would be average times or periods.

1


Your length needs to be measured in metres at this point (so it should be 0.30 m in the formula), and the period is measured in seconds, not m/s2 which is acceleration.

2


You have to show how you calculated the percent error. Why did you show the sources of error at the end, and not here?

1


All you’ve done is say that your lab was successful and what your value was. There’s a lot more you could say here.

1


Where are the questions? 0

Overview & SummaryI know that you were doing ok actually performing the lab to get your final results, but you need to put some of that effort into making sure that you write a careful lab report at the end.

Final Mark13/28


Block: 5/6 Date: May 8 Prepared By: Ella, Arturo

Comments Mark (?/3)




Groovy stuff. 3


Groovy again! 3


Great job! 3


Not applicable N/A


On the chart you should say that the time you measured is in seconds. 2


You showed a lot of great work, but you didn’t show a calculation for an average of all your values at the end. By the end of an analysis in a lab like this I should be able to look at one number that is your “final answer”.

2


Again, you should find the average of all these values calculated for the percent error. Otherwise, good job on the section.

2


You should say quite a bit more in the conclusion, and check it for grammatical errors.

1


#1: The pendulum wouldn’t float, it would just swing down slower. You can get very accurate results still.#2: Sorry, they did know about gravity. That would be like saying that they didn’t know the sky was blue because they couldn’t explain it. They just hadn’t studied gravity as much.

0

Overview & SummaryGreat start to the lab. It just sort of gets a little weak by the end. Look at ways to improve some of those areas.

Final Mark19/28


Block: 7/8 Date: May 8 Prepared By: Jennifer Kelsey

Comments Mark (?/3)


Great. 3


I think when you used equation editor for the formula something went a little funny. The “pi” symbol ended up floating above “g”.

2


Looks good. 3


Okey dokey. 3


Not applicable N/A


Yikes! You did a LOT of trials! Great! I will make one suggestion that might make it a bit easier to compare your observations… you could put all of the 1.0 m long measurements in one table, all the 0.80 m in another, and so on.

3


Groovy stuff. Did you notice a trend in the accuracy of your answers for different lengths?

3


You think we have actual air conditioning in our classroom? I wish! Come visit me during summer school… I’m like the witch at the end of the Wizard of Oz (“I’m melting…..”). They’re just fans, but I get your meaning anyhow.

3


Since all your values were about the same, but under 9.81, what does that say about your precision and accuracy? And by getting rid of some errors, your values would have been more ____ (not precise).

3


I’m not sure why you say that it would be difficult to get the pendulum to stay at a 20º angle on the moon.

4

Overview & SummaryI like this lab! Great job!

Final Mark27/28


Block: 7/8 Date: May 8 Prepared By: Sarah Jason Chris

Comments Mark (?/3)


What’s this stuff about “to use formulas known” at the beginning? Just come right out and say “We will measure the acceleration due to gravity in Edmonton.”

2


Where did the extra 2pi come from? Also, you have to show what each part of the formula is equal to.

2


Ok. 3


Yup. 3


Not applicable N/A


You can’t show gravity in this chart, since that is part of your analysis, which hasn’t been done yet.

2


Sorry, but what do all these strings of numbers like…7/7 16 712 /7 16 752 /7 62 723 /7 18 726 /726…mean?By the end of this section you should also give me one (averaged) value for “g”.

1


You show how you came up with an average, but how did you calculate your percent error?

1


Um, needs to be much longer. 0


Looks good. 4

Overview & SummaryWhat happened? It looks like this was the first draft.

Final Mark18/28


Block: 7/8 Date: May 8 Prepared By: Maily, Tanja, Leslie

Comments Mark (?/3)


Great. 3


Fantastic! 3


Yup, looks good. 3


Re-read step 7… it’s a little tough to understand, and it isn’t 5 periods, it’s 5 swings. A period is an amount of time for one swing.

2


Not applicable N/A


Great! 3


Great! You did a good job of laying it out. 3


You should give your sources of error as a list, not a paragraph. Also, the sources and calculation of the percent error are one section of the lab, not two.

3


Wow, that’s a big conclusion! 3


#2 Given human reaction time, can you actually guarantee your values to the hundredths?

4

Overview & SummaryTop notch lab!

Final Mark27/28


Block: 7/8 Date: May 8 Prepared By: Justin, Adam, Stephan, Clayton

Comments Mark (?/3)




I know you didn’t know it then, but you know now that using a “G” instead of “g” means different things in a formula. Always put the formula down exactly the way it appears on the data sheet.

3


Groovy 3


Your step #2 could be misinterpreted to mean that you measure something like how high you’re holding it (“to where you swing it from”). Re-read it and you might see what I mean. You should also mention that you intend to do this over again for other lengths of string.

2


Not applicable N/A


Okey dokey. 3


You now need to calculate the average of these three values. 3


You can’t just choose an answer that you think agrees with your hypothesis and go with that… why would you even bother doing extra trials then? You also need to show your complete calculations for the percent error. And write your sources of error in point form, not a paragraph.

2


This is pretty good. Just watch how you explain some things (low change in height above…)

2


Good stuff. 4

Overview & SummaryOverall a solid lab, just a few spots to clean up a bit.Next time, if you hand it in on the net, don’t hand in a paper copy as well.

Final Mark25/28


Block: 5/6 Date: May 7 Prepared By: Michael Dylan Neil

Comments Mark (?/3)


The first sentence (“This lab is to measure the gravity in our super cool physics classroom in Edmonton.”) is great, but you have to drop the rest. You can’t talk about your hypothesis (9.81) or how you’re going to do it (with a pendulum) in the objective.

2


You need to show what each variable in the formula is equal to. Also, why do you talk about one value for g at the start (9.00), and then end by saying “actual value of 9.80”? If you think it’s actually 9.80 (which isn’t what it says on your data sheet), then say it.

2


Ok, although my first choice for a stopwatch is not on a cell phone. 3


Give your steps as a numbered list so they are easier to follow. Near the end you talk about time for revolutions, which is not what the pendulum does. It swings; a revolution would mean it was going in a complete circle.

2


Not applicable N/A


Good job here, although some of your statements are more like analysis, since you’re are coming to conclusions about what the data means about gravity. Try to avoid that.

3


Good job. You do need to move your calculation of percent error to the error section, though.

3


Like I pointed out above, your percent error calculation is supposed to be here. Although it is not a big deal, next time give your sources as a list, not in a paragraph.

2


You have changed your objective! Now you say you are measuring gravitational force, which is different. And then you say something about your “hypotenuse” , when I think you mean “hypothesis”.

2


#2 You finally get to the right answer at the end… he made the formulas, and he measured gravity as best he could using his formulas and data he collected.

3

Overview & SummaryGood job, just a few details to clean up.

Final Mark22/28


Block: 5/6 Date: May 7 Prepared By: Chris Kevin Zack

Comments Mark (?/3)


Great. 3


Good hypothesis. You very carefully explained your reasons. 3


Love the diagram! 3


If you tied the weight to the string after measuring it, that would change the length.

2


Not applicable N/A


Omit.Chris brought me the paper that had your observations on it later that day… he forgot to put it in originally. Sorry, but it’s gone missing. I won’t hold that against you, so I’ve just omitted the portion of the mark.

N/A


Good work, but your percent error doesn’t belong here. It goes in the next section.

3


If your measurements are off by a couple of centimetres, then you were being very sloppy in your measurements. Also, you must show how you calculated the percent error.

1


This is a well stated conclusion. Congratulations! 3


Groovy 4

Overview & SummaryGreat lab guys. Sorry about misplacing that page, but that’s what ya get when you hand it in to me at 3 pm in front of the school .

Final Mark21/24


Block: 5/6 Date: May 6 Prepared By: John Rodney

Comments Mark (?/3)


Great. 3


Fantastic! 3


Yup, looks good. 3


Step #2 is a bit vague… “Set up pendulum experiment”. Yes, that’s the lab we’re doing, so what do we need to do?

1


Not applicable N/A


Great. 3


Good work. You need to put the percent error in the next section though. 3


This is where the error calculation goes. Your reasons are good. 2


Good stuff. 3


#1 What value in your observations would be different?#2 He created that formula.

0

Overview & SummaryThis is a very well done lab. Good work.

Final Mark21/28


Block: 5/6 Date: May 7 Prepared By: Chris Anthony Trevor

Comments Mark (?/3)


Great. 3


Fantastic! 3


Yup, looks good. 3


#5 What is a “so” degree angle… or is that supposed to be 50? 2


Not applicable N/A


Those aren’t’ the number of “periods” on your chart, they are the number of “swings”. A period is an amount of time (in seconds) to complete one cycle.

2


Good stuff. Very quick and clear. 3


Good stuff 3


But this was a real pendulum! 3


#2 Actually, he created this formula and did thousands of calculations with it. He would have been fine with that part of it.

2

Overview & SummaryFantastic work! This is a great example of a well done lab.

Final Mark26/28


Block: 7/8 Date: May 9 Prepared By: Tyler James Neil

Comments Mark (?/3)


Good, but you don’t need to tell me how you are going to do the lab. 3


Ok 3


Present this in the form of a list, not a paragraph. As it is, it is very bulky. 2


Why did you choose 90º as a maximum, when the formula is only valid for swings up to about 20º?

2


Not applicable N/A


Ok 3


Good job. 3


Again, put this section in point form. Also show how you calculated the error (a formula).

2


Good job. 3


Good. 4

Overview & SummaryReally great lab!

Final Mark25/28


Block: 5/6 Date: May 8 Prepared By: Sonya Eddie

Comments Mark (?/3)


Great. 3


You should also show what each variable is measured in. 2


Yup, looks good. 3


Why did you want to use such a large angle? Remember, the formula is only valid for angles up to about 20º.

2


Not applicable N/A


Great! 3


Great. 3


Good stuff. 3


Big conclusion! 3


Great! 4

Overview & SummaryThis is a very well done lab. You need to fix up some small details, but that’s all.

Final Mark26/28


Block: 5/6 Date: May 9 Prepared By: Bryce Emmanuel

Comments Mark (?/3)


Great. 3


You should also give the units that each variable is measured in. 3


Yup, looks good. 3


Ok 3


Not applicable N/A


By this point you should tell me what length of string you used. 2


Good stuff, but the calculation of percent error should be in the next section. 3


Good sources, but remember to put your calculation of percent error here next time. Also, your method for calculating it is incorrect.

1


Ok. 3


#2 Actually, he created this formula. Math just wasn’t his strongest ability. 4

Overview & SummaryGreat lab!

Final Mark25/28


Block: Date: Prepared By:

Comments Mark (?/3)


Great. 3


Fantastic! 3


Yup, looks good. 3


Re-read step 7… it’s a little tough to understand, and it isn’t 5 periods, it’s 5 swings. A period is an amount of time for one swing.

2


Not applicable N/A


Great! 3


Great! You did a good job of laying it out. 3


You should give your sources of error as a list, not a paragraph. Also, the sources and calculation of the percent error are one section of the lab, not two.

3


Wow, that’s a big conclusion! 3


#2 Given human reaction time, can you actually guarantee your values to the hundredths?

4

Overview & SummaryTop notch lab!

Final Mark27/28


Lab Mar… · Web viewA word you need to watch out for is “revolutions”. You should really...

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