Materials:
1. glow sticks
Additional Information:
When glow sticks are bent, the inner glass is broken, releasing hydrogen peroxide solution. This then reacts with a diphenyl oxalate, producing 1,2dioxetanedione; this product is unstable and decomposes to carbon dioxide, releasing energy. The energy is absorbed by electrons in dye molecules, which subsequently fall back to their ground state, losing excess energy in the form of light.
Important Safety Information:

Do not puncture, cut or break the glow sticks; inner sleeve contains class

Do not hit the glow item against anything as doing so may cause leaks

Contact with eyes or skin may cause temporary discomfort. In case of eye or skin contact, flush with water for 15 minutes.

Do not put in mouth or ingest contents
Procedures:
1. Remove 1 glow stick/ group from the package
2. Grasp both ends of the stick.
3. Bend stick with arch facing away from face/body. a. Do not bend sharply or kink because doing so may cause contents to leak or spray out under pressure.
4. Shake to activate
Station Question:
When you snap the stick, what causes the change in color (the glowing)?
Clean-up:
Throw glow sticks in the trash can and put station instructions back in the middle of the table.

Materials:
1. unpopped popcorn kernels
2. popped popcorn
Additional Information:
Popcorn “pops” when a tiny amount of water contained in the kernel is superheated and turns to steam.
When enough pressure builds up inside the kernel, it ruptures, and some starch previously contained within the kernel fuses together as it cools to form a fluffy solid.
The driving force behind this change is water being converted to steam (a change of state). Nothing chemically new is made.
Note that the difference in color is not an actual color change. It is just the result of the popcorn kernel being inverted
–what used to be on the inside is now on the outside. A once hidden color is revealed after the popcorn pops.
Important Safety Information:

Do not eat the popcorn. [They were prepared along with the preparations of chemicals used in this lab].
Procedures:
1. Look and gently touch the baggies with unpopped and popped popcorn.
Station Question:
How is the popcorn different from before and after it was popped?
Clean-up:
Make sure the baggies are still tightly sealed.
Put the baggies and station instructions back in the middle of the table.

Materials:
1. 20 mL hydrogen peroxide
2. ½ tsp of yeast
3. thermometer
4. bowl
5. spoon
Additional Information:
Important Safety Information:

PPE required: eye goggles and gloves

Hydrogen peroxide may cause respiratory and digestive tract irritation.
May cause skin irritation. May cause severe eye irritation and injury.

If swallowed, get medical help or contact a Poison Control Center right away.

If contact with eyes, flush eyes with plenty of water for at least 15 minutes.
Procedures:
1. Pour the hydrogen peroxide into the bowl and place the thermometer in the liquid.
2. Record the starting temperature of hydrogen peroxide in your observation.
3. Pour in the yeast and stir.
4. Record your observations and the change in temperature.
5. Clean-up.
Station Question:
How much did your temperature rise?
**subtract final temperature and initial temperature
Clean-up:
Pour all liquid down the drain. Rinse all materials used with water. Dry materials.
Put all cleaned materials and stations instructions back in the middle of the table

Materials:
1. sugar
2. water
3. cup
4. spoon
Additional Information:
When sugar dissolves in water, it forms a mixture – sugar water. The sugar can be separated from the water in solution through evaporation or boiling off the water. During the dissolving process, the sugar still exists as a molecular compound. The weight or mass of the sugar remains the same even though it cannot be seen in the solution. It is still there. No additional sugar molecules have been added or taken away from dissolving.
Important Safety Information:

Do not drink the sugar water.
Procedures:
1. Fill the cup halfway with water
2. Add a spoon of sugar and stir.
3. Record your observations.
Station Question:
Can you still taste the sugar after it is dissolved in water? Why is that important?
Clean-up:
Throw the sugar water down the drain. Dry all materials.
Put all cleaned materials and station instructions back in the middle of the table.

Materials:
1. gummy bears
2. gummy bears submerged in water
Additional Information:
When gummy bears are made, gelatin and water are heated, just like making
Jell-O. As the mixture cools, the water is drawn out of the bears and harden to chewy little bears. As the water is removed in the cooling process, the gelatin solidifies.
When the gummy bears are added to water, the water molecules will move into the bear through osmosis.
Osmosis is the movement of water
(solvent) into the gummy bear
(solute).
In other words, there is less water and more gelatin inside the gummy bear.
There is more water outside the gummy bear. The water doesn’t want to be crowded, so some of the water molecules will move inside the gummy bear where there are fewer water molecules and a lot of gelatin molecules.
Important Safety Information:

Do not eat the gummy bears.
Procedures:
1. Look at the gummy bears in the baggie and the gummy bears submerged in water.
2. Record your observation?
Station Question:
What caused the change in size in the gummy bears submerged in water?
Clean-up:
Put all the materials and stations instructions in the middle of the table.

Materials:
1. Cup
2. Water bottle
3. 20 mL hydrogen peroxide
4.
½ spoon of yeast
5. 10 mL warm water
6. dish soap
Additional Information:
Important Safety Information:

PPE required: eye goggles and gloves

Hydrogen peroxide may cause respiratory and digestive tract irritation.
May cause skin irritation. May cause severe eye irritation and injury.

If swallowed, get medical help or contact a Poison Control Center right away.

If contact with eyes, flush eyes with plenty of water for at least 15 minutes.
Procedures: Station Question:
1. In the water bottle, put 20 mL of hydrogen peroxide
2. Squeeze a few drops of dish soap into the hydrogen peroxide.
3. In another cup, mix warm water and yeast.
4. Pour the yeast mixture into the water bottle with the hydrogen peroxide.
5. Record your observations.
6. Clean-up
What evidence did you see that gas is produced in this reaction?
Clean-up:
Pour all liquid down the drain. Rinse all materials used with water. Dry materials.
Put all cleaned materials and stations instructions back in the middle of the table

Materials:
1. paper
Important Safety Information:
Additional Information:
Procedures:
1. Take a piece of paper
2. Have one person draw on the paper.
3. Have a second person fold the paper
4. Have a third person crumple it up.
5. Have a fourth person uncrumple the paper and tear the paper into small pieces
Station Question:
Clean-up:
Throw used paper in the trash can.
Put all materials and stations instructions back in the middle of the table

Materials:
1. leaves
Additional Information:
Leaves are where plants make their own food. This process happens in the cells that contain chlorophyll, which gives the leaf its green color.
This extraordinary chemical absorbs from sunlight the energy that is used in transforming carbon dioxide and water to carbohydrates, such as sugars and starches. If a leaf does not receive enough water or light, the leaves will stop this food-making process. The chlorophyll breaks down, and the green color disappears.
Important Safety Information:
Procedures:
1. Carefully observe the leaf sample.
2. Record your observations.
Station Question:
What is causing the decomposition of the leaves?
Clean-up:
Put all materials and stations instructions back in the middle of the table

Materials:
1. Baking soda
2. Vinegar
3. Water bottle
4. spoon
Additional Information:
Baking soda is a bicarbonate (NaHCO
3
) and vinegar is an acetic acid
(HCH
3
COO). One of the products this reaction creates is carbon dioxide.
Important Safety Information:

PPE required: eye goggles and gloves

Vinegar may cause eye irritation

If contact with eyes, flush eyes with plenty of water for at least 15 minutes.
Procedures:
1. Put a spoonful of baking soda into the water bottle
2. Add a little bit of vinegar at a time.
3. Record your observations.
Station Question:
What might you see if you put a balloon on the water bottle where you have mixed baking soda and vinegar?
Clean-up:
Pour all liquid down the drain. Rinse all materials used with water. Dry materials.
Put all cleaned materials and stations instructions back in the middle of the table