Step+5

Step 5 : Scenarios
Once your team has finished steps 1-4, you will need to see your teacher for Step 5 (this one). Your teacher will assign you __**three**__ out of these five scenarios, you do not pick your own! Record your answers on this form called Scenarios. *Each chemist will turn in one of these Scenario sheets with the Investigative Report.

[[image:pizza.png width="80" height="45" align="left"]] **__EXAMPLE 1__**: The Death of Pizza
Look at how pizza goes through your digestive system at the Yucky site, and answer the following questions:

1a. What starts chemical changes in food?

1b. Are the following physical or chemical changes? On your Scenario sheet, you may use the letter P = physical change and C = chemical change. _1. The teeth tear off a bite of pizza. _2. The starch in the pizza crust turns to sugar. _3. Muscles squeeze the chewed pizza down your esophagus. _4. In the intestines, liquids from the kidneys and pancreas mix with leftovers from the stomach. _5. Water is recycled back into your body.

**__EXAMPLE 2__**: You are My Sunshine
2. Look at this description of the sun at this website, the Sun. Are the following descriptions of the sun chemical or physical properties?

a. The sun is a huge ball of hot spinning gases. b. The sun has dark magnetic fields called sun spots. c. The sun causes solar winds.

**__[[image:mushroom-md.png width="109" height="72" align="left"]] EXAMPLE 3: __** There's a Fungus Among Us
3. Take a look at the world of fungi at the Fungus Kingdom. Are the following chemical or physical properties? On your Scenario sheet, you may use the letter P = physical change and C = chemical change.

a. Many Club Fungi look like umbrellas growing from the ground. b. Some Club Fungi are deadly or hallucinogenic. c. Sac fungi hel produce beer and bead. d. All lichens but one are believed to be non-poisonous. e. Old Man's Beard is a green-gray lichen that hangs from trees. f. Black morels, a Sac Fungi, look like pebbles or pine cones.

**__[[image:rock.png width="66" height="86" align="left"]] EXAMPLE 4: __** Rock Your World
4. Look at the rock cycle on the following sites. Cycles The Rock Cycle

A re the following physical or chemical changes? On your Scenario sheet, you may use the letter P = physical change and C = chemical change.

a. Weathering b. Deposition c. Metamorphism d. Melting

__[[image:simple-teeth-md.png width="93" height="41" align="left"]] EXAMPLE 5: __ Your Glowing Teeth
Read through a Science 911 report to answer the following questions

5a. What property causes substances to glow or become luminous, when they are scratched, crushed or rubbed? b. Is triboluminescence a physical property or chemical property? c. What kind of lifesaver is an example of this property?

Once you are finished with your Scenario sheet, proceed to Step 6.