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Week 7-Using the Discriminant

While solving quadratic equations, it’s useful to take a look at the discriminant.

The discriminant is area under the square root in the quadratic formula:



if you have a quadratic equation (equation equal to zero with 3 distinct parts), you can use the quadratic formula to solve. Depending on the answer, we can figure out whether the equation will have 1,2 or 0 solutions.


Let’s find the discriminant of the equation: x^2-3x+6=0

In a quadratic equation, the parent would be ax^2+bx+c

following the parent, in our equation, a=1, b=-3, and c=6

using this information we can plug in the numbers to our equation to find the discriminant.

If b^2-4ac is our equation, we just put our numbers we found in the spots of the letters, and simplify.











using this we know that since the discriminant is -15, the original quadratic equation does not have any solutions, and using the quadratic formula would not work.

ADL15 Mutation Story- Angelman Syndrome

Part 1: My story

Angelman Syndrome gene story

Part 2: The making of my Mutation Story

Some of the questions I answered to aid me in making my gene story:

  •  How does the syndrome effect my host’s life?
  • how does the protagonist of my story work inside the cell?
  • How does the syndrome effect the functioning of the host’s body?
  • What caused the mutation to occur?

Some digital tools i used to aid in the making of my story:

  • Google chrome
  • bookmarked pages that I used to research my mutation
  • other websites then Wikipedia
  • Microsoft Word

Order I did my work:

  • Research mutation
  • brainstorm and make notes about mutation/story
  • forget about story until day before due date
  • write story
  • proof read my story
  • check criteria
  • make Edublog post
  • check criteria again
  • sit back and relax

links to websites and pages used for research:


chromosome picture- http://

picture of child with angelman syndrome- http://

Research pages:




Overall I found this project enjoyable. I love writing and getting a chance to write a story about something that relates to both writing and science inspired me. I don’t think there’s anything about this project I would do differently, only that I should’ve finished sooner 🙂

Skype chat with Tanya Harrison

skype chat

Last week our class had a Skype chat with an astroscientist named Tanya Harrison. Her line of work includes studying space but more specifically, Mars and the rovers sent there. She used to be an employee at NASA and is a professional photographer, as well as that she has a Ph.D. in geology.

During the Skype chat we talked to Tanya and asked her questions about her line of work. She was extremely knowledgeable about space and what she does and taught us a lot of things a textbook couldn’t. During the interview, each group in our class got the chance to ask Tanya a question about space, her line of work, schooling, or any general questions she’s willing to answer. Some of the questions we asked her were:

Which rover sent to Mars was she the most involved in? She worked with multiple rovers over the years but she’s been the most involved with the rover “Curiosity”.

What’s the longest time a rover has lasted in Mars? Tanya said the longest a rover has every lasted on Mars was a whopping 12 years, even though it was only supposed to last about 90 days. That record is held by the rover “Opportunity”.

How long does it take to build a rover that can be sent to Mars? Her answer was that it takes NASA about 8-10 years to design and create a rover that could be sent to Mars one day.

How much money does it cost to build a rover? Rovers are extremely expensive and it costs about 2.3 million dollars just to build one.

I thought it was a really cool experience to have Tanya Skype into our classroom. She answered pretty much all of the questions we asked her and knew something about all of them. It was a really great way to kick off our space unit in Science, and I felt like I learned a great deal from chatting with her.


Prediction about best fruit/vegetable conductor

I believe the best conductor of electricity that’s a food is a lemon


I believe that a lemon can be a good conductor because it acts the same way as a battery. a battery contains two pieces of metal called electrodes, and a liquid or paste called electrolytes. When the electrodes and electrolytes connect with a material that can transport electricity well (a conductor). This causes a chemical reaction to occur. In a lemon, a solution of water and a electrolyte (the acid in a lemon) makes a large amount of electrons collect on one end of the electrodes, while at the same time many are lost from the other electrode. This causes a lemon to act like a battery when two different wires are connected to it. The wires act as the electrodes having one become positively charged and the other negatively charged.