The student will demonstrate an understanding of living systems and the environment TAKS Objective 2

Distinguish between inherited traits and other characteristics that result from interactions with the environment TEKS 8.11 B

Killer Rays

 ENGAGE Visit this website:

UV Index 0-2 minimal 3-4 low 5-6 moderate 7-9 high 10+ very high

 EXPLORE Make a UV bead bracelet using the materials provided by your teacher.Make a UV bead bracelet using the materials provided by your teacher. Wrap UV beads in each of the three types of fabrics. Place the fabric-wrapped UV beads in a plastic Ziploc® bag and expose it to direct sunlight. Remember to include a control. Record your results.Wrap UV beads in each of the three types of fabrics. Place the fabric-wrapped UV beads in a plastic Ziploc® bag and expose it to direct sunlight. Remember to include a control. Record your results.

EXPLAIN EXPLAIN The UV beads contain a pigment that changes color in the presence of ultraviolet radiation from the sun The UV beads contain a pigment that changes color in the presence of ultraviolet radiation from the sun Ozone layer reflects or absorbs 99% of damaging UV rays from the sun Ozone layer reflects or absorbs 99% of damaging UV rays from the sun

There are a number of activities and events that cause ozone destruction: Hydrogen bomb testingHydrogen bomb testing CFCs (chlorofluorocarbons) in aerosols and refrigerantsCFCs (chlorofluorocarbons) in aerosols and refrigerants Exhaust gases from supersonic aircraftExhaust gases from supersonic aircraft Fertilizers andFertilizers and Volcanic eruptions.Volcanic eruptions.

SPF of Clothing Cotton shirt – SPF 7Cotton shirt – SPF 7 Denim jeans – SPF Denim jeans – SPF Polyester/lycra surf shirt – SPF 35Polyester/lycra surf shirt – SPF 35

 ELABORATE At home, try different types of sunscreen or liquid makeup.At home, try different types of sunscreen or liquid makeup. At home, place some beads under a sunglass lens in an area that is exposed to direct sunlight. If the beads remain white, then your sunglasses are blocking harmful ultraviolet rays. Test different pairs of sunglasses.At home, place some beads under a sunglass lens in an area that is exposed to direct sunlight. If the beads remain white, then your sunglasses are blocking harmful ultraviolet rays. Test different pairs of sunglasses. MD Anderson Sun SafetyMD Anderson Sun Safety

Project S.A.F.E.T.Y MD Anderson SunSun AwarenessAwareness ForFor EducatingEducating Today’sToday’s YouthYouth For Project SAFETY information call

Measure Your Sun Awareness PretestPretest Label parts of the skin (animation)Label parts of the skin (animation)animation –Epidermis –Dermis –Basal cells –Melanocytes –Melanin –Squamous cells

Reasons for Increased Cancer 1/3 of people living in the sunbelt will develop skin cancer in their lifetime (see handout)1/3 of people living in the sunbelt will develop skin cancer in their lifetime (see handout) Depletion of the ozoneDepletion of the ozone Cultural and lifestyle changes (e.g., dress, entertainment outdoors)Cultural and lifestyle changes (e.g., dress, entertainment outdoors) Tanning bedsTanning beds

Risk factors Sun exposureSun exposure Family historyFamily history Geographic locationGeographic location Tendency to freckle or burnTendency to freckle or burn Hair and skin typeHair and skin type Unnoticed skin lesions for darker skinned individualsUnnoticed skin lesions for darker skinned individuals Discovery and diagnosis of melanoma at a late stage of development for darker skinned individualsDiscovery and diagnosis of melanoma at a late stage of development for darker skinned individuals

Types of Skin Cancer Basal cell carcinoma – slow, seldom spreads, often appears as an enlarged pearly or waxy noduleBasal cell carcinoma – slow, seldom spreads, often appears as an enlarged pearly or waxy nodule

Squamous cell carcinoma – present in darker skinned people, may metastasize, may appear as a red areas with a crust that does not healSquamous cell carcinoma – present in darker skinned people, may metastasize, may appear as a red areas with a crust that does not heal

Melanoma – can occur at a young age and can metastasize rapidly to all parts of the body, originate from molesMelanoma – can occur at a young age and can metastasize rapidly to all parts of the body, originate from moles

ABCD Asymmetry (PS2-49 animation)Asymmetry (PS2-49 animation)PS2-49 animationPS2-49 animation Border irregularity (PS2-50 animation)Border irregularity (PS2-50 animation)PS2-50 animationPS2-50 animation Color variation (2 or more colors)Color variation (2 or more colors) Diameter (6 mm which is about the size of the top of a pencil eraser)Diameter (6 mm which is about the size of the top of a pencil eraser)

Let’s Look at a Few Video Clips What is a tan?What is a tan? Look of skin cancer.Look of skin cancer. SPFSPF Shadow TestShadow Test Terri’s StoryTerri’s Story Grace’s StoryGrace’s Story

Questions 1.Which part of the skin shows freckles, moles, and wrinkles? 2.What is the deepest layer of the skin called 3.What component of the skin creates a tan? 4.Which cells are located at the base of the epidermis? 5.Which cells make up the majority of the epidermis?

More Questions 6.In what layer of the skin do we find blood and lymph vessels? 7.What are the 3 types of skin cancer? 8.What are the ABCs of melanoma? 9.How can you reduce you chance of skin cancer?

 EVALUATE During the learning activity, “Exploring the Effect of UV Radiation, the student will record hypotheses, collect data and draw conclusions for each experiment on the handout provided by the teacher. A completion grade will be given. During the learning activity, “Exploring the Effect of UV Radiation, the student will record hypotheses, collect data and draw conclusions for each experiment on the handout provided by the teacher. A completion grade will be given. Complete the Posttest for sun safety