Advanced Cell Theory

How can the four principles of infectious disease presented support the principles of cell theory?

Scale of the Universe

Go to this website

Scale of the Universe

Answer the following questions by exploring the app

1. What is the average height of a human in meters?
2. What does the 0.7 for mechanical pencil lead mean?
3. What is an ovum? Can we see an ovum with the naked eye?
4. What is the purple thing in the skin cell? (hint: you can see another version of this purple object in the background when looking at the skin cell)
5. Based on the size of the purple cell nucleus, do you think red blood cells have nuclei?
6. Mitochondria (the powerhouse of the cell!) use what source of chemical energy to make ATP (a high energy molecule used in the cell)?
7. Are things that are smaller than the wavelength of violet light visible under an optical microscope?
8. How many micrometers in a meter?
9. Are viruses bigger or smaller than cells?
10. How many meters of DNA is in each cell’s nucleus?
11. What part of the cell do phospholipids make up?
12. What do the little black spheres on the glucose molecule represent? (hint: they represent the same thing as the black spheres on the buckyball)
13. Can electron microscopes see smaller than atoms?
14. What two subatomic particles make up the nucleus of atoms?
15. What are quarks?
16. According to spacetime theory, what makes up the foundation of the fabric of the universe?
17. Is our star (the sun), a relatively large or a relatively small star in the universe?
18. If all 7+ billion humans stood on top of each other (and didn’t crumple under the weight) would the total height be larger or smaller than the sun?
19. How big is the observable universe?
20. Humans see colors ranging from red to violet. Which wavelength is bigger, red or violet light?

Cell Theory

• List the three parts of the cell theory
• What was the source of the name “cell?”
• Identify two significant contributions to cell theory presented in the video.
• Identify one ‘controversy’ shown in the video. What was the source of disagreement?

Word of the Day

This week we are starting an new entry task assignment that you will complete at the start of the period every day.  You will be given a list of latin and greek roots and phrases to put in your notebook.  Every day I will post a new science term that you will need to define.

How the assignment works:

1.  Write the word

2.  Break the word down into its component pieces with definitions from your list.

3.  Write a definition that you think fits the word.  This can be based on your knowledge of the word or inferred from the pieces you get from your worksheet.

example:

-Hypothesis

       Hypo - Under

       thesis - an arrangement

A scientific prediction that can be tested or A way of organizing information to make a scientific prediction.  

Note:  You are not being graded on whether your definition is correct.  Merely if it works within the context you establish.

Feedback Loops

Be prepared to describe Positive and Negative Feedback loops, and give examples.

✘Write a ClEvR statement that answers the question "Can humans maintain their inner body temperature despite changing external temperatures?". Don't forget to use 'evidence' from the Gizmo experiment. Be sure to include your 'reasoning' that tells how the evidence supports your claim.

External Resources, Thursday activity

I am adding a google classroom page to help share presentations and other resources with the class.  Go to Google Classroom and use code

sww0dpa

to join the class.  (Note the zero (0) is showing as a lower case "o" on some web browsers)

You need to do this through your psd267.org account or you will get booted. 

Do the activity indicated (read the article "Why life does no really exist"  and submit your responses on the form indicated.  

Finally, We will be using 'Gizmos" to do virtual labs this year.  Go to 

https://www.explorelearning.com/

and register (make the same username as your school account.  Remember that I can see your password.)  Your classroom code is:

1st Period:  

RHTRML

5th Period

PZQDZ9

Thanks

Characteristics of Life

Identify the six characteristics of life presented in the class.

Investigation #4 - LiDoDeNA

Objective: Classify a series of objects as Living, Dormant, Dead or Never Alive (LiDoDeNA)

Purpose: To derive a functional definition of life.

Procedure

• Working in pairs, infer if each specimen is LiDoDeNA.
• Make 3 observations to support your inference
• Record your data in your notebook.
• After 2 minutes, go to the next specimen and repeat.

Questions

1. On your own, make a personal list of all of the ways you decided if something was alive. Title this list in your notebook “My List”. 
2. At your table groups, share your findings. 
• What similar observations did you make? Any different ones? 
• Did you disagree on some of the specimens? Why?
3. In your table groups, write a list of everything everyone wrote down as evidence that something is alive. If there is a repeat, put a tally mark next to it. 
• Every person make a list in your notebook. Title it “Group List”

Outside sources

https://www.khanacademy.org/science/biology/intro-to-biology/what-is-biology/a/what-is-life

https://www.sciencelearn.org.nz/resources/14-characteristics-of-living-things

https://prezi.com/28vvswcztohh/how-do-you-know-if-something-is-alive-or-dead/

http://www.bozemanscience.com/005-essential-characteristics-of-life/

Investigation #3 - Sampling

Objective:  Determine the number of plants on the hillside behind PHS

Purpose:  To demonstrate the value in sample size when conducting quantitative analysis.

Procedure:

You will be working in groups of two.  (There will be four groups of four.)

Go to your assigned area on the hillside and mark off a 0.50m square area.  Note the following:
How many different species of plant are in your square?
How many samples of each plant are in your square?
How many total plants are in your square?

Upload your data here.

• Describe your method for conducting the 'census.'
• How did you use the people on your group?
• What is Selection Bias?  How do you think it applied to this lab?
•  How did the size of the plants affect your sample size?
• How many sample sites should be enough?
• How do you account for obstacles lock rocks and trails?

The creation of Biology (Observation and Inference)

• According to the video 'Biology' began in 1790.  How was Biology done prior to that time?
• What is systema?  What is its purpose?
• How did European colonialism contribute to biology?

Types of Observation


Quantitative:  Based on measurable numbers (quant-aties)

Qualitative: Based on non-measurable (qual-ities)

Investigation #1 -Canister Lab

Objective: Determine the contents of several sealed containers
Purpose: To apply the scientific method and design process

Procedure
There are 29 total canisters, each containing various numbers of the following materials:

• marbles 
• blocks 
• beans
• orbeez 
• pennies 
• You will be working in groups of two.
• Determine a procedure to predict the contents of 8 total containers without opening the containers.
• Determine any additional materials you will require. (Have the instructor verify your procedure before you begin.)
• Each group has two (2) canisters available. When you and your partner finish the first two, switch with the other group at your table. After 25min we will rotate sets. Continue until you have completed Eight (8) total canisters. 

Questions

1. What properties did you believe would be the most useful in determining the contents of each container?
2. Overall, how close were your estimates to actual contents of each container?
3. What are two assumptions you made in selecting your procedure?
4. What are two scientific errors that may have affected your results?
5. How many trials did you conduct for each canister? How did you decide that this was the appropriate number?
6. If you had to do this investigation again, what are two things you would do differently? 

Upload your data here

Scientific method

Identify three big ideas presented in the video.

Other concepts to understand

Hypothesis:  A prediction you can test.
Scientific Theory:  An explanation supported by experiment. (Explains WHY something happens)
Scientific Law:  A 'Rule of Nature' (states what will happen.)