h appy f riday !!! october 11pg. daily goal: we will analyze how sunscreen affects ultraviolet light...
TRANSCRIPT
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HAPPY FRIDAY!!!October 11 pg.
Daily Goal: We will analyze how sunscreen affects ultraviolet light waves.
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We know that there are light waves that we can see and light waves that we can’t see.
1. Name one kind of wave that we can’t see.
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Where do we encounter ultraviolet light in our everyday life?
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The sun is one major source of ultraviolet light..
Even on a cloudy day, we are receiving ultraviolet rays from the sun.
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Our skin absorbs the ultraviolet waves from the sun.
We need energy from the sun. It is our most important source of Vitamin D.
But too much is bad for our skin. If our skin absorbs too much energy, we can get badly burnt. It can even cause cancer.
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Knowing what we know about how light waves work – absorption, reflection, and refraction – take a moment to think about how sunscreen might change UV light so that it doesn’t damage our skin.
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WE HAVE UV BEADS
UV beads change color when they are absorbing ultraviolet light waves.
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IF YOU HAVE
3 bags of UV beads, 1 bag you will leave in a sunny spot 1 bag you will leave in a sunny spot with
sunscreen on the beads 1 bag, you will leave in the shade
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IN YOUR NOTEBOOK…
What do you think will happen to each bag? What will the color of the beads look like? Why?
Write down your hypothesis in your interactive notebook. Make sure you say what you think will happen to each set of beads and why.
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Make a data table to show your results.
Bag #1: No sunscreen in the sun
Bag #2: Sunscreen in the sun
Bag #3: No sunscreen in the shade
Original Color:
Concluding Color:
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ANALYZE YOUR RESULTS
In your notebook answer…
Did your results support or refute (reject) your hypothesis?
Why do you think you got the results that you did? What happened to the light in each situation?
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MAKE A POSTER TO SHOW WHAT YOU KNOW
Draw a picture that illustrates what happened during the experiment. It should include what was happening to the light
waves at each stage.
o Write at least 3 sentences explaining your drawing.
o Give your poster an attention – grabbing but accurate headline.