PTT:
1) Get your lab paper from last week and get in your group.
2) Take 10 minutes to finish answering the lab questions and/or to neaten up your lab page.
3) Turn this into the basket for your class for grading - each lab will go into PowerSchool as a separate grade.
Task 1:
1) Turn to page 104 in your science notebook and record the date: W26, D1
2) Record the title: Reflection and Refraction Practice
3) Record the Goal Question: What happens when light hits a mirror or a lens?
4) Get a Reflection and Refraction Practice Assignment off of the front counter and tape it to p. 104. You will have 7 minutes only to complete the worksheet. Raise your hand when you are done for me to check the assignment for a grade. If you get stuck, use the resources below to help you:
Concave vs. Convex (and Lenses vs. Mirrors):
Convex Mirror
Concave Mirror
Convex lens
Reflection and Refraction Video:
Task 2: Practicing with the Law of Reflection
1) Title p. 105: The Law of the Reflection
2) Get a Law of Reflection worksheet off of the counter. We will complete the first few examples together and then you will work with a partner to complete it.
3) Tape the worksheet to p. 105
Task 3: Blind Spot - 'To see or not to see'
Mark a dot and a cross on a card as shown.
Hold the card at eye level about an arm's length away. Make sure that the cross is on the right.
Close your right eye and look directly at the cross with your left eye. Notice that you can also see the dot. Focus on the cross but be aware of the dot as you slowly bring the card toward your face. The dot will disappear, and then reappear, as you bring the card toward your face.
Now close your left eye and look directly at the dot with your right eye. This time the cross will disappear and reappear as you bring the card slowly toward your face.
Try the activity again, this time rotating the card so that the dot and cross are not directly across from each other. Are the results the same?
Why does this happen?
The optic nerve carries messages from your eye to your brain. This bundle of nerve fibers passes through one spot on the light sensitive lining, or retina, of your eye. In this spot, your eye's retina has no light receptors. When you hold the card so that the light from the dot falls on this spot, you cannot see the dot.
As a variation on this blind spot activity, draw a straight line across the card, from one edge to the other, through the center of the cross and the dot. Notice that when the dot disappears, the line appears to be continuous, without a gap where the dot used to be. Your brain automatically "fills in" the blind spot with a simple extrapolation of the image surrounding the blind spot. This is why you do not notice the blind spot in your day-to-day observations of the world.
Task 4:
Move onto the day 2 lesson
Homework:
The unit test will be on Friday. Topics to be addressed are:
- Types of objects: transparent, translucent, opaque
- How light interacts with objects: transmission, scattering, reflection, refraction, absorption
- The EM Spectrum: know the waves in order and a use for all of them
- Be able to label a wave diagram (know the parts of a wave)
- How we see color: primary colors of light and how they mix, absorption and reflection of color wavelengths, each color has its own wavelength
- Be able to read a color absorption graph (like on p. 101 in your notebook)
- How light interacts with convex and concave mirrors and convex and concave lenses (be able to draw and label)
- Law of Reflection: state the law, label a diagram, use this to draw an image in context
- Nearsightedness and Farsightedness: draw and explain what is wrong with the eye in these two situations, identify what type of lens fixes the problem
Week 26, Day 2
PTT:
1) Turn to p. 106 in your science notebook
2) Record the date: W26, D2
3) Record the title: Lenses and the Human Eye
4) Record the goal - Goal Q: How does your eye help you see, and why do some people have trouble seeing?
Task 1:
1) As a class, we'll watch a dissection of a cow's eye to see all the different parts of the eye and how they work. This will be a good preparation for the 8th grade lab where we dissect a pig's heart. If you want to watch it again later, the link is here: Exploratorium - Cow Eye Dissection
2) On the top half of page 106, draw a detailed diagram of the human eye. Use the video, the Exploratorium's diagram of a cow eye, and this diagram of a human eye to help. Parts that must be labeled: lens, iris, pupil, cornea, retina, optic nerve, sclera
The Human Eye
3) At the bottom of page 106, draw a chart like the one below. In every branch of science, we find that the structure of objects determines their function. The eye is no exception to this pattern. For each structure in the eye listed in the chart below, you will record its function (basically, what it does, its purpose, etc).
You will fill in this chart by using the Exploratorium's interactive eye diagram (linked above for step 2) and - as needed - other resources that you find on the internet.
NOTE: for the lens, make sure you record whether it is convex/converging or concave/diverging while you are recording its function.
a) BOX 1: Draw and label a diagram to show what happens to light when it goes through the human eye.
b) BOX 2: Explain how the human eye forms images. Use the following terms in your answer: lens, convex, converge, focal point, eye, upside down Then explain how we interpret images from our eyes. Use the following terms: retina, optic nerve, brain
c) Some people have trouble with their vision, and when they try to see objects they appear blurry or fuzzy. We call some people nearsighted and others farsighted. In BOX 3, draw and label diagrams to represent the difference between where a normal eye, a nearsighted eye, and a farsighted eye focus images.
Do you notice how the eye's structure (shape, in this case) affects how it functions?
d) We use lenses in glasses and contacts to help fix the vision of people with nearsighted and farsighted eyes. In BOX 4, draw and label diagrams to show how different types of lenses are used to correct nearsightedness and farsightedness.
Task 3:
Do some research on your own. Find a resource from Prezi, Vimeo,Youtube, Glogster or Voicethread and share it with some classmates.
Here is one Mr. Austen found on Vimeo called "The Bionic Eye". It's a fascinating example of science and technology working together to improve the lives of people who have a vision impairment.
Task 4:
Answer the following questions based on the notes you took on p. 107: Task 5:
1) Get a blank piece of paper
2) On a blank paper, draw the following combinations:
Concave lens with light and image passing through
Convex lens with light and image passing through
Human Eye with normal (20/20) vision
Human eye with nearsightedness (focuses before retina)
Human eye with farsightedness (focuses behind retina)
Human eye with nearsightedness and corrective lens to fix it
Human eye with farsightedness and corrective lens to fix it
Closure:
Look back to the goal you recorded on the top of page 106. Have you achieved it? Can you explain how your eye helps you see and why some people have trouble seeing? As an extra bonus, can you explain how we fix the problems people have with their vision?
Homework:
Review for test (if you want, you may start working on the review assignment posted under day 3)
Week 26, Day 3
PTT:
Open your notebook to pages 106-107. Check that you are done these pages. If not, go back to yesterday's lesson and finish. Make sure you showed me your paper with the diagrams for a grade.
Task 1:
1) Decide whether you would like to complete your own copy of the review or work with a partner.
2) If you decided to work with a partner, you will need to divide the questions between the two of you so that both of you study all of the objectives. Decide who will answer the even numbered questions and who will answer the odd numbered questions.
3) Make a copy of the following document and share it with your partner (if you have one). Then make sure you both put it in your science folders in google drive. Waves and Light Unit Review
4) Use the remaining class time to work on the review assignment.
Resources: Along with your notebook, below are some good resources to help you with the review.
Homework:
Use the review assignment and your notebook to study for your test - it will be on day 4 (Friday).
Check out the main physics page for links to helpful videos and a book chapter.
Remember: I will also be grading your notebooks while you take the test. Review Answers
Week 26, Day 4
PTT:
Sit with your partner. Quiz each other on the information covered in the review assignment.
Task 1:
Take the test.
Task 2/Closure:
Once I have collected your test, open your notebook and begin decorating the cover page for this unit. Decorate it with images and diagrams that represent what we have learned in this unit.
Week 26, Day 1
Table of Contents
1) Get your lab paper from last week and get in your group.
2) Take 10 minutes to finish answering the lab questions and/or to neaten up your lab page.
3) Turn this into the basket for your class for grading - each lab will go into PowerSchool as a separate grade.
Task 1:
1) Turn to page 104 in your science notebook and record the date: W26, D1
2) Record the title: Reflection and Refraction Practice
3) Record the Goal Question: What happens when light hits a mirror or a lens?
4) Get a Reflection and Refraction Practice Assignment off of the front counter and tape it to p. 104. You will have 7 minutes only to complete the worksheet. Raise your hand when you are done for me to check the assignment for a grade. If you get stuck, use the resources below to help you:
Concave vs. Convex (and Lenses vs. Mirrors):
Reflection and Refraction Video:
Task 2: Practicing with the Law of Reflection
1) Title p. 105: The Law of the Reflection
2) Get a Law of Reflection worksheet off of the counter. We will complete the first few examples together and then you will work with a partner to complete it.
3) Tape the worksheet to p. 105
Task 3: Blind Spot - 'To see or not to see'
Mark a dot and a cross on a card as shown.
Why does this happen?
The optic nerve carries messages from your eye to your brain. This bundle of nerve fibers passes through one spot on the light sensitive lining, or retina, of your eye. In this spot, your eye's retina has no light receptors. When you hold the card so that the light from the dot falls on this spot, you cannot see the dot.
As a variation on this blind spot activity, draw a straight line across the card, from one edge to the other, through the center of the cross and the dot. Notice that when the dot disappears, the line appears to be continuous, without a gap where the dot used to be. Your brain automatically "fills in" the blind spot with a simple extrapolation of the image surrounding the blind spot. This is why you do not notice the blind spot in your day-to-day observations of the world.
Task 4:
Move onto the day 2 lesson
Homework:
The unit test will be on Friday. Topics to be addressed are:
- Types of objects: transparent, translucent, opaque
- How light interacts with objects: transmission, scattering, reflection, refraction, absorption
- The EM Spectrum: know the waves in order and a use for all of them
- Be able to label a wave diagram (know the parts of a wave)
- How we see color: primary colors of light and how they mix, absorption and reflection of color wavelengths, each color has its own wavelength
- Be able to read a color absorption graph (like on p. 101 in your notebook)
- How light interacts with convex and concave mirrors and convex and concave lenses (be able to draw and label)
- Law of Reflection: state the law, label a diagram, use this to draw an image in context
- Nearsightedness and Farsightedness: draw and explain what is wrong with the eye in these two situations, identify what type of lens fixes the problem
Week 26, Day 2
PTT:
1) Turn to p. 106 in your science notebook
2) Record the date: W26, D2
3) Record the title: Lenses and the Human Eye
4) Record the goal - Goal Q: How does your eye help you see, and why do some people have trouble seeing?
Task 1:
1) As a class, we'll watch a dissection of a cow's eye to see all the different parts of the eye and how they work. This will be a good preparation for the 8th grade lab where we dissect a pig's heart. If you want to watch it again later, the link is here:
Exploratorium - Cow Eye Dissection
2) On the top half of page 106, draw a detailed diagram of the human eye. Use the video, the Exploratorium's diagram of a cow eye, and this diagram of a human eye to help. Parts that must be labeled: lens, iris, pupil, cornea, retina, optic nerve, sclera
3) At the bottom of page 106, draw a chart like the one below. In every branch of science, we find that the structure of objects determines their function. The eye is no exception to this pattern. For each structure in the eye listed in the chart below, you will record its function (basically, what it does, its purpose, etc).
You will fill in this chart by using the Exploratorium's interactive eye diagram (linked above for step 2) and - as needed - other resources that you find on the internet.
NOTE: for the lens, make sure you record whether it is convex/converging or concave/diverging while you are recording its function.
Task 2:
1) Title page 107: How the Eye Works
2) Record the date: W26, D2
3) Divide the page into 4 boxes. Each box will be for the answer to a different question.
4) You will use the following resources to answer the following questions using written explanations and appropriate diagrams:
http://faculty.washington.edu/chudler/sight.html
http://www.aboutkidshealth.ca/en/howthebodyworks/eye/how-vision-works/Pages/default.aspx
http://kidshealth.org/kid/htbw/eyes.html#
a) BOX 1: Draw and label a diagram to show what happens to light when it goes through the human eye.
b) BOX 2: Explain how the human eye forms images. Use the following terms in your answer: lens, convex, converge, focal point, eye, upside down Then explain how we interpret images from our eyes. Use the following terms: retina, optic nerve, brain
c) Some people have trouble with their vision, and when they try to see objects they appear blurry or fuzzy. We call some people nearsighted and others farsighted. In BOX 3, draw and label diagrams to represent the difference between where a normal eye, a nearsighted eye, and a farsighted eye focus images.
Do you notice how the eye's structure (shape, in this case) affects how it functions?
d) We use lenses in glasses and contacts to help fix the vision of people with nearsighted and farsighted eyes. In BOX 4, draw and label diagrams to show how different types of lenses are used to correct nearsightedness and farsightedness.
Task 3:
Do some research on your own. Find a resource from Prezi, Vimeo,Youtube, Glogster or Voicethread and share it with some classmates.
Here is one Mr. Austen found on Vimeo called "The Bionic Eye". It's a fascinating example of science and technology working together to improve the lives of people who have a vision impairment.
Task 4:
Answer the following questions based on the notes you took on p. 107:
Task 5:
1) Get a blank piece of paper
2) On a blank paper, draw the following combinations:
Closure:
Look back to the goal you recorded on the top of page 106. Have you achieved it? Can you explain how your eye helps you see and why some people have trouble seeing? As an extra bonus, can you explain how we fix the problems people have with their vision?
Homework:
Review for test (if you want, you may start working on the review assignment posted under day 3)
Week 26, Day 3
PTT:
Open your notebook to pages 106-107. Check that you are done these pages. If not, go back to yesterday's lesson and finish. Make sure you showed me your paper with the diagrams for a grade.
Task 1:
1) Decide whether you would like to complete your own copy of the review or work with a partner.
2) If you decided to work with a partner, you will need to divide the questions between the two of you so that both of you study all of the objectives. Decide who will answer the even numbered questions and who will answer the odd numbered questions.
3) Make a copy of the following document and share it with your partner (if you have one). Then make sure you both put it in your science folders in google drive.
Waves and Light Unit Review
4) Use the remaining class time to work on the review assignment.
Resources: Along with your notebook, below are some good resources to help you with the review.
Homework:
Use the review assignment and your notebook to study for your test - it will be on day 4 (Friday).
Check out the main physics page for links to helpful videos and a book chapter.
Remember: I will also be grading your notebooks while you take the test.
Review Answers
Week 26, Day 4
PTT:
Sit with your partner. Quiz each other on the information covered in the review assignment.
Task 1:
Take the test.
Task 2/Closure:
Once I have collected your test, open your notebook and begin decorating the cover page for this unit. Decorate it with images and diagrams that represent what we have learned in this unit.