Last Meal Conversion Project Reflection

This project was really fun especially because food was involved! I think it  really played a big part in helping me understand the conversions and was great practice for the test. At first I thought it would be hard to memorize all the conversions but after having to use it so many times for this project, it became more easy to remember the exact measurements. It was also good practice for the rounding portion of this unit, which I really struggled with for a while but doing this project served as great practice. I'm glad we had this project actually because it was a nice cool off after the stressful unit test and it helped me review for the test as well! It was also interesting seeing what everyone else had made and all the recipes were so good it was hard picking who to give extra credit points to! I also had a fun time making my Oreo Pound cake!

Chapter 5

Accuracy vs Precision

http://www.uh.edu/engines/accurate-precise.jpg

Significant figures are digits with meaning contributing to its measurement resolution

Rounding: 

• you can estimate past the calibration of the measuring device
• example: round 0.1653 to the 0.001 place (answer: 0.165)

Significant Figures Rules: 

• zeros for "cosmetic" purposes are NOT significant
• zeros used to locate the decimal point is NOT significant
• Any numbers between 1 and 9 ARE significant 
• All zeros between non zero integers ARE significant
• zeros at the end of the decimal value ARE significant because it shows where you can round and the accuracy of the number (also where the measurement device is calibrated)
• all numbers in scientific notation ARE significant 

Addition and Subtraction: 

• the number of significant figures in the sum or difference are the same as the measurement with the smallest number of decimal places

Multiplication and Division: 

• the number of significant figures in the product is the same as the measurement with the least significant figures

Order of Operations:

• same as in math
• Parenthesis
• Exponents
• Multiplication
• Division
• Addition
• Subtraction

Metric Conversions: 

https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg_IYAFI7j7o2vXSq-8-zWeF7IsypN1dcuWMVIAKe1I9OZwsgfuVLudyYQcChG1SM2TEYwVcoqM79RatSJaCtE1Aj17FGwJTZmIQABSBSB9_pAWQipCLXExEx-O9XuN6pEQ6VCIuRE5-FE/s400/units+king+henry+died+drinking+chocolate+milk.png

Helpful Links: 

• http://www.usca.edu/chemistry/genchem/sigfig.htm
• http://chemistry.bd.psu.edu/jircitano/sigfigs.html
• http://chemistry.about.com/od/chemistryquickreview/a/accuracyprecise.htm

Practice: 

• http://www.dallassd.com/our%20schools/high%20School/Chemsite/chem/hotpot/sf.htm
• http://www.chemistrywithmsdana.org/wp-content/uploads/2012/07/SigFig.html
• Bookwork: pg 164 #1-34

Mole Day

Making the mole was a lot of fun because we were free to make it however we wanted and had minimal restrictions. This project was also less stressful and a nice reliever from the other projects. I think making the mole and having the mole day celebration helps us remember the significance in chemistry. I'll probably remember chemistry every time I see a mole or when the topic arises now. It was also fun seeing all the other moles and seeing all the creative ideas other people had. The party was fun too because it was a nice ending to the week and a nice reliever before the quiz Monday.

https://dj1hlxw0wr920.cloudfront.net/userfiles/wyzfiles/fdb688ae-ebf3-406f-adc0-879dc144e389.gif

At first I was confused as to why we were making a mole, but this link summed it up for me and it started to make more sense! 

Unit 3 Pre-test

I feel like there were some things in this pre-test that we already knew from previous classes. For example, measuring lengths and reading graduated cylinders. But I also think some questions were new but we could easily learn because they build on prior knowledge that we already have. I also struggled a little in remembering the answers for the review questions so I definitely have to go back and review so that I don't forget. I think my memory was probably rough from the break so I need to go back and simply review my notes. This unit seems pretty short and I hope I do well this unit so I can help my grade.