Wednesday, June 11, 2014

Molecules, Bonding, Equilibrium

molecules and bonding ppt
Make an outline of key information from each slide

Station Sheets:
start on station 1- complete them in order as we work through the ppt.
you may get the additional stations from the back table if you want to work at your own pace
There are 5 total Stations

Enrichment Activity:
Vocabulary/Concept flashcard
Get a notecard
Write the concept, equation, or idea on the front of the card
Write the details, answers, definitions, explanations, on the back of the card

Monday, May 19, 2014

organic compounds ppt
open it and complete the guided notes. Get model kits as instructed.

Monday, May 5, 2014

Battery Lab: Enrichment Research Questions

1) What is static electricity? What Causes it to buildup? How can it be discharged?
2) What is corrosion of a battery? Why does it happen?
3) How do rechargeable batteries work? Why do they tell you not to "overcharge" your batteries?
4) Why do you need a salt bridge?
5) How is the flow of electrons generated by a power plant? Describe the process of power plant electrical generation.
6) How do you make a fruit battery?
Come up with your own!
Research the answer on the Web, create a ppt. slide or typed answer to your question, and get an enrichment center HW credit (15/15 HW grade).



Thursday, May 1, 2014

How do batteries work, Part 2

DUE FRIDAY, MAY 2nd
http://preparatorychemistry.com/Bishop_Book_6_eBook.pdf
http://www.energizer.com/learning-center/Pages/how-batteries-work.aspx
Read the beginning of section 6.4, pages 224-226 (ending at Dry Cells) (1st link),
and watch the series of animations on the energizer website (2nd link)
Take cornel notes on your reading and animation. You can decide on the headings. You will have a short reading quiz at the beginning of class. You may use your cornel notes on the quiz.






Monday, April 28, 2014

HOW DO BATTERIES WORK?

Tasks for this lesson:

Create a cornel notes document in your class notes as you go to help you outline the concepts in the reading, linked below:

List of possible left hand-side topics for your split page notes:

Leave lots of room for each topic because you will find you have to modify your definitions as you progress through the reading

  • Everyday examples of electron transfer/ oxidation-reduction
  • oxidation-definitions
    • examples
  • reduction- definitions
    • examples
  • Drawings to represent oxidation/reduction
  • Redox
  • Redox Reactions: Examples

READING LINK:
http://preparatorychemistry.com/Bishop_Book_6_eBook.pdf

Wednesday, March 12, 2014

Lab 31: Titration Homework

HOMEWORK Lab 31: Performing Titration to Find the Concentration of an Unknown Basic Solution
Titration is one of the oldest techniques in chemistry, dating back to the late 1700’s when French scientists designed the first biuret.  A modern day biuret is like a longer, more accurate graduated cylinder with a rotating valve on the end.  This allows us to measure the volume of a liquid accurately up to 1/10th of a milliliter while we slowly mix it with another solution one drop at a time.  We will perform an acid-base titration.  Mixing acids and bases together creates a neutralization reaction, as long as the amount of acid is equal to the amount of base we should end up with a neutral solution of water and salt.  In acid-base titration you mix your two solutions together until the pH = 7.  This is the endpoint (or equivalence point) of the neutralization reaction.  With an accurate tool to measure the volume of our solution we can tell the concentration of an unknown solution of acid or base.  In this lab you will know the molarity of your acid and you will have to use titration to figure out the concentration of an unknown base.

HW Night 1: Due Friday
Work through or watch the following online resources on titration and answer the corresponding questions.

VIDEO 1: 
How do you know when the neutralization reaction has reached endpoint?


What do you notice about the solution as it gets closer to and eventually reaches the endpoint?





In our titration, we will have weak base in our flask and weak acid in our biuret.  We will use phenolphthalein as our pH indicator.  Why is phenolphthalein a good choice to find the endpoint of this titration?

Sunday, January 5, 2014

Evidence for Evolution

Use the following links to answer these questions in your notes
Evidence for Evolution
Berkeley: Lines of Evidence
15 examples of evidence for evolution
Genetic Differences between humans and Primates
Evidence for Evolution "for dummies"

1) Describe the concept behind the Theory of Evolution

2) Choose 4 general types of evidence that support the theory of evolution from this list:

[genetic evidence, similarities among organisms alive today, geographical distribution of species, similarities among embryos, cell comparison, biochemical process comparison, modern examples observable in a lab]

Make a Quad T-Chart as follows and fill it in, following the example given. (do not use fossil record in YOUR CHART)

Type of Evidence
Explanation
Example
How does this type of evidence support the theory of evolution?
1) Fossil Record
Fossilized remains of extinct species of various ages ago, found buried by modern scientists
Archaeopteryx was found in southern Germany.  It had jaws with teeth and a long bony tail like dinosaurs, broad wings and feathers like birds, and skeletal features of both.  This discovery verified the assumption that birds had reptilian ancestors.”
The extensive remains we see in the fossil record of animals and plants show how living things have changed  over time.  Often times, specific fossils illustrate the evolutionary past of current-day species.
2)


3) 


4)





3) Which pieces of evidence do you find most powerful and convincing? Why?


Thursday, January 2, 2014

Genetic Engineering

Resources:
Genetic Engineering powerpoint
Genetic Engineering basics Website
Image About Insulin Engineering
Union of Concerned Scientists: discussion of ethics of Genetic engineering
Cloning Process simplified
Cloning Entire Organisms
cloning genes
Ethics in genetic engineering
Stem Cell Basics

1) Key Vocab: Create a Vocabulary Flashcard for each. State the definition and then draw a picture that goes with it.  You do not have to complete this first, you may work on it as we go.
1) Genetic Engineering
2) Restriction Enzymes
3) Cloning
4) Genetically Modified Organism
5) Hybrid Interbreeding
6) Stem cells

2. Describe 2  methods scientists use to take a gene from one organism and insert it into the cells of another organism.

3. Describe an example of how genetic technology has:
a) helped society deal with food issues
b) Helped lead to solutions for diseases

4. Draw a diagram showing how scientists clone sexually reproducing organisms.

5. Why are stem cells considered important to the future of medicine?

6. Choose one type of genetic technology (genetic modification, cloning, stem cells). 
Write an argumentative paragraph explaining whether you think your specific genetic technology  is ethical or unethical.  State your claim, why you think so and then give at least 1 piece of evidence (a quote or a scientific fact) to back up your argument. Explain why the evidence you provided backs up your claim.