1. Update Agendas everyday. Bring journals to class everyday.

Iodine Clock Reaction Lab

(This is an enrichment activity that will be accessible in class from 11/5/2015 through 11/25/2015) 

What you need:

·        distilled water (tap water will work OK as well)

·        a couple plastic cups

·        1000 mg vitamin C tablets

·        tincture of iodine (2%)

·        hydrogen peroxide (3%)

·        liquid laundry starch

·        magnesium citrate capsule

What to do:

·        Make a vitamin C solution by crushing a 1000 mg vitamin C tablet and dissolving it in 2 oz of water. Label this as “vitamin C stock solution”.

·        Combine 1 tsp (5 ml) of the vitamin C stock solution with 1 tsp of iodine and 2 oz (60 ml) of water. Next add the magnesium citrate and mix well. Label this “solution A”.

·        Prepare “solution B” by adding 2 oz (60 ml)  of water to 3 tsp (15 ml) of hydrogen peroxide and 1/2 tsp (2.5 ml) of liquid starch solution.

·        Pour solution A into solution B, and pour the resulting solution back into the empty cup to mix them thoroughly. Keep pouring the liquid back and forth between the cups.

What’s going on?

There are actually two chemical reactions going on at the same time when you combine the solutions. During these reactions two forms of iodine created – the elemental form and the ion form.

In Reaction # 1 iodide ions react with hydrogen peroxide to produce iodine element which is blue in the presence of starch. BUT, before that can actually happen, the Vitamin C quickly reacts and consumes the elemental iodine.

The net result, at least for part of the time is that the solution remains colorless with excess of iodide ions being present. Now after a short time as the reactions keep proceeding in this fashion, the Vitamin C gets gradually used up. Once the Vitamin C is used up, the solution turns blue, because now the iodine element and starch are present.

Safety Precautions

Be careful when working with the iodine – it stains, and it stains really well. Be very careful not to spill any of the solution.

Waste Disposal

Dispose all liquids down the drain with plenty of water.

Learn More

Dig deeper into the science behind clock reactions in this paper from the Journal of Chemical Education.

 

http://imaginationstationtoledo.org/content/2012/06/the-iodine-clock-reaction/

Seed Germination Cornell Notes

2. Click on following link to develop your Seed Germination Cornell Notes: Cornell Notes 

SEE BELOW TO SAVE TO YOUR DRIVE:) and SHARE WITH DSBLOOM@MPSAZ.ORG

Instructions below are for Google Book Laptops:

1. Click on the following link to open your Cornell Notes Word fillable form. 

**When note page opens click on "Got It" 

**Click on BLUE SHARE BUTTON in upper right corner.

2. Click on: "Save as google docs"

See below for Questions: (add additional information from your research on procedures to germinate seed.)

ESSENTIAL QUESTION:

Essential Question: How can you compare a seed germination process to the point in time when the Big Bang happened?

 

What are the easiest seeds to germinate?

 

What is germinate?

 

How long does it take for the plant to grow after germination?

 

Does it grow in Phoenix AZ?

 

What season does your plant grow best in?

 

How much sunlight does your plant need?

 

How hardy is your plant?

 

What is hardy?

Word Bank- Start 10/13/2015 End 10/30/2015

 

Must have journals p 1-7 (see image below for journal help) up to date before signing up for Iodine Clock Reaction Lab!

space weight Journal pages 1-7

3. Must complete first 3 Columns 24 words total. These are DUE: Thursday 10-29-2015. See below for word wall image:

Wood Wall/Bank

Iodine Clock Reaction Lab: experiment days: Thursday 10/29/2015 through Monday 11/2/2015  This week we will continue to understand the Scientific Method process and practice reading a graduated cylinder to find the meniscus.  


 


Space Weight Lab (start-10/19/2015 end-10/23/2015)

HOMEWORK for Monday 10/19/2015Go home or to the library before you attend class tomorrow to PRINT YOUR completed CORNELL NOTES TO ADD TO YOU JOURNAL PRIOR TO THE INVESTIGATION ON TUESDAY.

Instructions below are for Google Book Laptops:

1. Click on the following link to open your Cornell Notes Word fillable form. 

**When note page opens click on "Got It" 

**Click on BLUE SHARE BUTTON in upper right corner.

2. Click on: "Save as google docs"

Type or copy and paste the following Questions on the LEFT side of the Cornell notes document (type answers on right side of document):

What is Matter?

What are the 3 main states of matter?

What is Gravity?

What is the difference between mass and gravity?

How can we measure the differences?

What measuring tools do we need?

Why do we use centimeters instead of inches in Science?

3. Go home or to the library to print before tomorrow's class period.

4. Go to left side of this page and review safety and measurement for tomorrow's investigation.