Lesson: Today we finished the two labs on reflection/refraction and the mirror maze.
Homework: Study for quiz
You need to be able to do the following:
- List the types of waves in the Electromagnetic Spectrum in order (for visible light, you need to know the colors of visible light in order)
- Draw and label all the parts of a wave
- Explain what happened in the waves in the "Waves on the String" - how are the wavelength, the frequency, and the wave speed related?
- Explain how light interacts with transparent, translucent, and opaque objects
- Label a reflection diagram (angle of incidence, angle of reflection, incident ray, reflected ray, normal)
- Draw a reflected ray based on the incident ray
- Draw and explain the difference between a concave and convex mirror
- Draw and explain the difference between a concave and convex lens
- List the primary colors of light AND the primary colors of pigment
- Explain why objects appear to be the color they are
- Explain what happens when we shine a colored light on an object that is a different color.
Resources for studying:
- Week 8, Day 3 PTT (look at the links we went to in class)
- Pages 113, 114, 115, 116, 117, 120, 121, 123 in your science notebook
- This file:
Reminder: You should have completed and uploaded both labs to Google Drive (Reflection/Refraction AND the Mirror Maze). You will have a group grade for the paper you completed (your drawings and measurements) and an individual grade for uploading your answers to the questions into Google Drive.
PTT:
1) Turn to page 124
2) Record the date: W9, D2
3) Record the title: Reflection & Refraction Practice Assignment
4) Record the goal - Goal: I can accurately label and diagram what happens when light hits a lens or mirror.
Task 1:
1) Get a Reflection & Refraction Practice Assignment worksheet off of the counter.
2) You will need to complete both sides of the worksheet - you will have 12 minutes ONLY. Raise your hand when you're done for me to check your paper (for a grade!). If you get stuck, use the resources below to help you:
Concave vs. Convex (and Lenses vs. Mirrors):
Concave Lens
Convex Lens
Concave Mirror
Convex Mirror
Reflection and Refraction:
Task 2: Waves, Color and Light Quiz Review (you will get 8 minutes to review)
List the 7 types of waves in the Electromagnetic Spectrum from longest to shortest wavelength.
Draw and label a wave. Include wavelength, amplitute, resting point, crest and trough
What happens to light when it hits a transparent, translucent, opaque objects
Explain how we see color (example: red apple)
Name the primary colors of light and of pigment
Draw and label each part of a light ray hitting a mirror (Angle of Incidence, angle of reflection, incident ray, Reflected ray, normal and mirror
Task 3: last 30 minutes of class
We will be taking the quiz!
NOTE: I would appreciate help from anyone who can stay after school and help grade the quizzes.
Week 9, Days 3-4
PTT:
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.
Prep for Task 1:
1) Tape graded quiz to page 125 in your notebook
2) Turn to page 126
3) Record the date: W9, D3
4) Record the title: Lenses and the Human Eye
5) Record the goal - Goal: I can explain how my eye helps me see and why 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 126, 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 126, 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.
Structure
Function
Lens
Retina
Optic Nerve
Cornea
Pupil
Iris
Sclera
Task 2:
1) Title page 127: How the Eye Works
2) Record the date: W9, D3
3) Divide the page into 4 boxes. Each box will be for the answer to a different question.
4) You will use the Holt life science online textbook to answer the following questions using written explanations and appropriate diagrams. Specifically, you'll want to use pages 440-444 and 450-451 to answer the questions.
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. 127: 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 126. 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?
Week 9, Day 1
Lesson: Today we finished the two labs on reflection/refraction and the mirror maze.
Homework: Study for quiz
You need to be able to do the following:
- List the types of waves in the Electromagnetic Spectrum in order (for visible light, you need to know the colors of visible light in order)
- Draw and label all the parts of a wave
- Explain what happened in the waves in the "Waves on the String" - how are the wavelength, the frequency, and the wave speed related?
- Explain how light interacts with transparent, translucent, and opaque objects
- Label a reflection diagram (angle of incidence, angle of reflection, incident ray, reflected ray, normal)
- Draw a reflected ray based on the incident ray
- Draw and explain the difference between a concave and convex mirror
- Draw and explain the difference between a concave and convex lens
- List the primary colors of light AND the primary colors of pigment
- Explain why objects appear to be the color they are
- Explain what happens when we shine a colored light on an object that is a different color.
Resources for studying:
- Week 8, Day 3 PTT (look at the links we went to in class)
- Pages 113, 114, 115, 116, 117, 120, 121, 123 in your science notebook
- This file:
Week 9, Day 2
Reminder: You should have completed and uploaded both labs to Google Drive (Reflection/Refraction AND the Mirror Maze). You will have a group grade for the paper you completed (your drawings and measurements) and an individual grade for uploading your answers to the questions into Google Drive.
PTT:
1) Turn to page 124
2) Record the date: W9, D2
3) Record the title: Reflection & Refraction Practice Assignment
4) Record the goal - Goal: I can accurately label and diagram what happens when light hits a lens or mirror.
Task 1:
1) Get a Reflection & Refraction Practice Assignment worksheet off of the counter.
2) You will need to complete both sides of the worksheet - you will have 12 minutes ONLY. Raise your hand when you're done for me to check your paper (for a grade!). If you get stuck, use the resources below to help you:
Concave vs. Convex (and Lenses vs. Mirrors):
Reflection and Refraction:
Task 2: Waves, Color and Light Quiz Review (you will get 8 minutes to review)
Task 3: last 30 minutes of class
We will be taking the quiz!
NOTE: I would appreciate help from anyone who can stay after school and help grade the quizzes.
Week 9, Days 3-4
PTT:
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.
Prep for Task 1:
1) Tape graded quiz to page 125 in your notebook
2) Turn to page 126
3) Record the date: W9, D3
4) Record the title: Lenses and the Human Eye
5) Record the goal - Goal: I can explain how my eye helps me see and why 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 126, 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 126, 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 127: How the Eye Works
2) Record the date: W9, D3
3) Divide the page into 4 boxes. Each box will be for the answer to a different question.
4) You will use the Holt life science online textbook to answer the following questions using written explanations and appropriate diagrams. Specifically, you'll want to use pages 440-444 and 450-451 to answer the questions.
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.
The Bionic Eye | Steven Cantor from Focus Forward Films on Vimeo.
Task 4:
Answer the following questions based on the notes you took on p. 127:
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 126. 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?