Warm up pg 77Define:

-Carcinogen-Teratogens

-Mutagens-Neurotoxins

Calculate GPA on your report card

Tell partners when ESPN is and which assignment

you are doingPick up 1 scratch paper per table—

name and which ESPN you are doing

Give to me

Agenda 5-22—No problems today—games tomorrow• Warm up• ESPN prepSTAMP• Hot seat summary pg 78STAMPHot seat debateSTAMP• Present toxin postersSTAMP

Warm Up pg 751) What are two differences between plastics?

2) What are ways to reduce our use of plastics?3) How do toxins get into ocean?

4) Which ESPN assignment are you doing?Pick up new passport and old one—filled in old one=$1 CC

Symposium

•A-M present first to 3-4 peers•N-Z makes 4 boxes and listen to 4 peers•We will then switch

3 assignments—You pick 1Circle and put your name on paperASSIGNMENT 1—Explore ESPN with a parent/guardian

ASSIGNMENT 2—Explore California Science Center

ASSIGNMENT 3—Create and present a Model during ESPN

Today’s Agenda May 201) Warm Up pg 752) Toxins clip summary pg 75 STAMP4) Toxin ppt notes pg 76STAMP6) Computer researchSTAMP7) Gallery walk on toxins

Toxins in Whales• https://www.youtube.com/watch?v=83aCjGyOdRQ&noredirect=1

Toxin Notes pg 76Copy everything in blue

•A chemical that can cause temporary or permanent harm or death to a living organism is considered toxic.•Toxins are labeled according to what body systems they affect.

•Mutagens damage the DNA within cells, increasing the frequency of mutations.

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Chemical Toxins

• Carcinogens are chemicals, forms of radiation, or viruses that increase the risk of cancer.• Arsenic• Benzene• Formaldehyde• Tobacco smoke• UV radiation

• Teratogens are chemicals that cause birth defects inan unborn fetus.• Ethanol• Benzene• Lead• Mercury

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• Neurotoxins are chemicals known to disrupt the function of the brain, spinal cord, and other nerves.• Mercury can cause sensory impairment, lack

of coordination, and disrupt other nervous system functions.• Lead, another neurotoxin, was used as an

additive in gasoline until 1976. • Following a ban of its use, an 80% drop in

blood lead levels were observed, as well as a 6-point gain the average IQ of children.

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• Endocrine hormone disruptors interfere with the function of normal chemical messengers in the body.• Hormone mimics have similar shapes to natural

hormones and amply their effects.• Hormone blockers prevent natural hormones from

attaching to their target organ.

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• One commonly used chemical called BPA is known to be a hormone mimic.• BPA is found in many plastics, as well as the linings of cans and

boxes used in food packaging.• Scientists disagree over the population effects of BPA, and its use in

the United States is still legal.• We can make better choices to limit toxins in our body and

environment

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Toxins build up more and more in the food chain. This is called biomagnification.

Computer Research•You each have your own toxin based on number•Answer 1-7 by 2:30•Be ready to present in our symposium