VIDEO: HALF-LIFE CONCEPTS AND DEMONSTRATIONS

THIS WEEK'S LESSON (CLASSWORK)

Students:

You will find a video summarizing this week's lesson on radioactive half-lives below:



THIS WEEK'S TASK (HOMEWORK)

At the end of the video, there will be three problems involving the half-life calculations demonstrated in this week's ZOOM lesson and on an embedded demo in the original Power Point. 

COPY THE THREE PROBLEMS AT THE END OF THE VIDEO, and use the flowchart technique modeled in the video to answer the questions.   Take pictures of the three problems and send them, attached to an email, to:

Scott.Hatfield@fresnounified.org  

VIDEO: TYPES OF NUCLEAR REACTIONS

Students: if you were unable to attend last week's ZOOM conference, you missed notes and demonstrations that are very helpful in completing last week's class assignment.  

If, for whatever reason, you have not attempted that assignment, please watch the video below:




After watching the video, students should be able to attempt alpha decay, beta decay, gamma and positron emission, electron capture and alpha bombardment problems!  

If you have not already done so, please email Mr. Hatfield and request a link in order to get that assignment:

Scott.Hatfield@fresnounified.org

Now, if you are late in focusing on this, please understand that when students attend ZOOM conferences, they not earn extra credit for doing CLASSWORK, they also learn about that week's TASK, which earns students extra credit for participating in HOMEWORK.  There will always be at least one task given every week for each class.

Now, here's your NEXT TASK for the week of April 22-29.  It will be something that looks like THIS:

Again, in order to get YOUR copy of the task, please send Mr. Hatfield an email, at:

scott.hatfield@fresnounified.org

Mr. Hatfield will forward a copy of the task as a PDF file.   Either print out the file or copy down the problems on a piece of paper.   Attempt everything given!   Then, take a picture of each page's work, with your work shown, and attach that image to a SECOND email, which you will send to Mr. Hatfield!

YOUR CLASS'S NEXT ZOOM CONFERENCE

1st (10:00 AM) and 2nd period (11:00 AM) will have ZOOM conferences on Wednesday, 4/29.  

Periods 3 (10:00 AM), 4 (11:00 AM) and 5 (1:00 AM) will conference on Thursday, 4/30.   

You will need to attend one of these to earn extra credit for this week's lessons.

UPDATE: THIS WEEK'S TASK

Students:

Just an update to make sure all of us understand how Mr. Hatfield is providing opportunities for growth in Chemistry during this time when we are all "in exile".

First, when students participate in a ZOOM conference, they receive extra credit for participating in CLASSWORK.   There will always be at least one ZOOM conference every week for each class.

Second, when students attend ZOOM conferences, they will learn about that week's TASK, which earns students extra credit for participating in HOMEWORK.  There will always be at least one task given every week for each class.

Now, here's your NEXT TASK for the week of April 22-29.  It will be something that looks like THIS:

In order to get YOUR copy of the task, please send Mr. Hatfield an email, at:

scott.hatfield@fresnounified.org

Mr. Hatfield will forward a copy of the task as a PDF file.   Either print out the file or copy down the problems on a piece of paper.   Attempt everything given!   Then, take a picture of each page's work, with your work shown, and attach that image to a SECOND email, which you will send to Mr. Hatfield

VIDEO NOTES: NUCLEAR CHEMISTRY (NUCLEAR NOTATION)

Students:  not everyone has been able to attend a ZOOM conference or email me in a timely fashion to request the notes they have missed.

And the fact is, we need to go on!   
                       
                                
This coming week,  we will be looking at various types of decay processes, which will use the nuclear notation that was taught last week.  

To make sure that all students have access that material, I have edited together the notes and combined them with short videos that walk students through the same demonstrations that I did 'live' last week.  

If you didn't see them, or you need to review, please watch the embedded video above.

1st (10:00 AM) and 2nd period (11:00 AM) will have ZOOM conferences on Wednesday, 4/22.  

Periods 3 (10:00 AM), 4 (11:00 AM) and 5 (1:00 AM) will conference on Thursday, 4/23.   

You will need to attend one of these to earn extra credit for this week's lessons.

There will also be an embedded blog post on Wednesday that will describe your next assignment, which you will do at home and then email with images attached to complete.

TRYING TO UNDERSTAND EXPONENTIAL GROWTH?

STUDENTS:

It's harder than people think, but it's not ridiculously hard.  This video uses several amusing examples (and quite a few special effects!) to get that point across:

UPDATE: EXPONENTIAL CHANGE, AND ZOOM MEETINGS STARTING APRIL 14TH!

Students:  This update is LONG, because it contains two important items:  an opportunity to participate in a lesson on exponential change, and information about 'Class Meetings' through ZOOM which will begin on Tuesday, April 14th.  Please read the whole post, below!

But before you do that, check out this video that shows Bullard staff packing up and distributing materials at our site to students and others in the community.  We hope you know we haven't forgotten you, and that we are still working as a staff to support you!   



Again, if you only able to visit this blog or go on ATLAS with a cell phone, Fresno Unified is making laptops available if you are having trouble accessing your teachers and classes on-line.  

Today's new opportunity relates to the idea of exponential growth patterns.   One example of an exponential growth pattern comes from 'Nuclear Chemistry', which is introduced in Ch. 25 of your text (pg. 798-808).   This example, called exponential decay, is useful for predicting the stability and safety of radioactive isotopes.*   Notice how the amount of isotope keeps falling, but it doesn't quite reach zero, because THE RATE OF DECAY BECOMES SLOWER AND SLOWER. 

*  As previously taught, an isotope is an atom whose nucleus has extra mass from carrying additional neutrons.  For example, a standard O atom is oxygen-16 (8 protons, 8 neutrons).  99.76 % of the oxygen atoms on Earth are oxygen-16, but the other 0.24 % are heavier isotopes, like oxygen 18 (still 8 protons, but 10 neutrons). 

Another example, exponential increase, describes the pattern of change often seen in populations of living things (and VIRUSES) when they are able to grow or spread rapidly.  In today's blog activity, you will eventually watch a video that demonstrates exponential increase. 

BUT (!) FIRST get a piece of paper and make a drawing that predicts what the shape of the curve will look like.  Underneath, write a sentence where you explain how you think the NUMBER (N) of individuals in the population would change, and also tell me how the RATE OF GROWTH will change. 

Now, BEFORE you watch the video, take a picture of your drawing.  Attach this picture to an email, and send it to Mr. Hatfield, at:

Scott.Hatfield@fresnounified.org

NOW WATCH THE VIDEO, HERE:




NOW, ABOUT ZOOM CONFERENCING!   Students should've been contacted by district email according to their class period, and given information about when THEIR class will meet next!  Honors (Period 1) will have their first meeting at 1:00 PM on Tuesday afternoon, April 14th.  Other classes will first meet either later that same day, or on Wednesday afternoon!  You'll see something that looks like THIS . . . . looking forward to seeing many of YOU!