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Lesson #6:

Ozone Depletion

Learning Target

Investigate a human activity that is harming polar bears by analyzing graphs and annotating an article.

Success Criteria

I am successful when I can....

1) Engage by hypothesizing why polar bears are developing skin lesions.

2) Explore the link between ozone depletion and skin cancer rates.

3) Explain how ozone depletion is caused

4) Elaborate by applying knowledge to explain the impact on polar bears.

Standards

HS-LS2-7.

Design, evaluate, and refine a solution for reducing the impacts of human activities on the environment and biodiversity

Reminders

Quiz on Tuesday, October 22nd.
Tutoring Wednesdays after school in A301

Part 1:

Warm-Up

Something Looks Sus

(One of Many is Incorrect)

(10 min)

Directions: View all three problems and answer the questions:

1) Which one is incorrect?

2) Explain why it is incorrect

3) Write the correct answer.

Warm up 1.pdf

Part 2

Hook

Engage

(2 min)

Investigation:

Polar bears are an endangered species that live in Antartica. Recently, scientists who study polar bear populations have noticed that many bears have started losing their hair and some are even developing large oozing lesions as you can see in the picture to the right. Scientists believe that the cause of the skin condition is tied to human activity.

1) What could be causing the hair loss and skin conditions of the polar bears?

2) How could it be related to the activities of humans?

Part 3

Slow Reveal Graph

(Explore)

(5 min)

Directions: In your groups, discuss the questions at the bottom of each slide.

Graph #1

Part 4:

Article

(Explain)

(15 min)

Ozone Depletion Reading

Part 5:

TN'T x 3

(Elaborate)

(15 min)

Turn n' Talk Numero Uno

Directions: Use the information from the article and graphs in order to answer the question:

Why are polar bears

getting skin cancer?

Turn n' Talk Numero Dos

Why are polar bears

getting skin cancer?

Academic Words

Biology Words

Turn n' Talk Numero Tres

Turn & Talk for a 3rd time creating a series of three statements using the following set of conjunctions:

“Because… But… So…”

Example: Mr. Pinho is tired BECAUSE he was up late making an awesome lesson for his students, BUT it's ok since they appreciate him SO it was totally worth having bags under his eyes.

Academic Words

Biology Words

Ozone Take-Away

1) CFC's (aerosals) and refrigerators/air conditionaires damage the Ozone layer that protects Earth.

2) Without an Ozone layer, UV light reaches the surface of our planet.

3) When UV light hits skin cells, it damages the cells genetic material causing mutations.

4) Mutations in skin cells can lead to skin cancer.

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