Objective: SWBAT construct an explanation using evidence from a model to explain why there is such a high rate of skin cancer in Australia.
Do Now:
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Question 1
1.
Identify the interactions and impact on humans below.
Exit Ticket Review:
Why is the following incorrect?
"Yes. All three lasers must be giving off different types of light because every light source gives off its own type of light."
Guided Notes:
Practice:
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Question 2
2.
What is different about the atmosphere above Brazil compared to the atmosphere above Australia?
CFS:
Accurately describes connections to the source of evidnece
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Question 3
3.
Does this difference help explain why Australia gets more UV light than Brazil? If so, how?
CFS:
Accurately identifies the type of light reactions that cause changes in objects
Accurately describes the relationship between wave properties and outcomes
"Due to the fact that Brazil has more Ozone than Australia I think that (more/less) UV light will reach the Earth because ..."
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Question 4
4.
The Australian Health Alliance is counting on you to help people understand why the skin cancer rate in Australia is so high. Use the Modeling Tool: Ultraviolet Light in Australia and Brazil to show your thinking, following the steps below.
Goal:
Show why Australia gets more UV light than Brazil by modeling how UV light waves travel through the atmosphere above each place.
Do:
Extend each arrow showing the path of UV light as it travels through the atmosphere toward Earth’s surface. If the light hits a material in the atmosphere, show what happens to the UV light.
Use a yellow highlighter to trace the path of energy.
Annotate your model to help show why Australia gets more UV light than Brazil.
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Question 5
5.
What evidence supports which type of atmospheric gas or gasses are most helpful in reducing UV exposure to humans on Earth?
CFS:
Accurately describes connections to the source of evidnece
Accurately identifies the type of light reactions that cause changes in objects
Accurately describes the relationship between wave properties and outcomes
"I think that the gas that is most helpful to reduce UV exposure to humans is (Carbon dioxide, Ozone, Sulfuric acid) because ...
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Question 6
6.
How do differences in ozone in Australia or Brazil’s atmosphere impact their preliminary risk of skin cancer?
CFS:
Accurately describes connections to the source of evidnece
Accurately identifies the type of light reactions that cause changes in objects
Accurately describes the relationship between wave properties and outcomes
Exit Ticket:
Sources of evidence:
1. The atmosphere above Australia has less ozone than the atmosphere above other parts of the world.
2. A lot of Australians have low levels of melanin in their skin cells.
3. Melanin in skin cells absorbs UV light before it reaches the genetic material inside the cell.
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Question 7
7.
You have been investigating why the cancer rate in Australia is so high. Use the Reasoning Tool below to connect each piece of evidence to the claim you think is accurate. Explain why each piece of evidence matters, then note the claim you think the evidence supports.
Question: Why is the skin cancer rate in Australia so high?
Claim 2: There is something different about the sunlight in Australia.
Claim 3: More people in Australia have skin that is easily damaged by light from the sun.
"I think Australia has a higher rate of skin cancer compared to other countries because ... "
1. cite 2 pieces of evidence
2. explain why the 2 sources of evidence increase risk of skin cancer.
CFS:
Accurately describes connections to a source of evidnece
Accurately identifies the type of light reactions that cause changes in objects
Accurately describes the relationship between light interactions and outcomes
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Question 8
8.
Based on this information, can light cause changes to the metal?