Freaky+Fireworks!

= = = How will changing the amount of potassium nitrate effect the height of home-made fireworks? = By Vili and Josiah

Task 1: = __Answer these Questions__ = __1. Why do fireworks explode?__

When a fuse is lit the gunpowder lets out a gas which makes the firework explode into the air

__2. How do you make fireworks?__

> the chemicals. One hole is drilled so that they can put the fuse or wick in the firework. Then they put the black powder (gun powder) in along with stars, whistlers and hummers. Finally you wrap the fire work in another layer to hold it all together.
 * 1) First you need to roll thick card board in a tube. Then you jam clay in to card board tube to separate


 * 1) __ What makes fireworks different colours? __

To make different colours in firework you need incandescence or luminescence the heat makes the mix Glow then BANG

__Task 2:__

List your independent, dependent and controlled variables:

__1. Independent variable:__ Changing the amount of potassium nitrate

__2. Dependent variable:__ Height of the flame/sparks

__3. Controlled variables:__

We will use the same size toilet roll and the same amount of sugar in each experiment. We will use the same hotplate and frying pan to make all 3 mixtures

= __Task 3: What is the hypothesis for your experiment?__ = Viliami: the tube that has the most potassium nitrate in it will make the biggest explosion Josiah: The tube that has the least potassium nitrate = less height and less spark

= __Task 4: What equipment do you need for your experiment?__ = 1. Toilet paper tube x3. 2.Frying Pan 3.Potassium nitrate 4. Sugar 5.Aluminum Foil 6. Lighter or matches 7. Hot Plate 8. Measurement Cups = __Task 5: List all steps in the method of your experiment__ =
 * 1) Wrap the bottom and sides of an empty toilet paper tube with aluminum foil. The purpose of the foil is to direct the fountain upward.
 * 2) In a frying pan, mix together 1/2 cup of sugar with 1/2 cup of potassium nitrate.
 * 3) Stir the mixture over medium heat.
 * 4) Continue cooking the smoke bomb fountain mixture until it is brown and well-mixed (liquified). Remove the mixture from heat and pour or spoon it into the foil-wrapped tube. Allow the tube to cool so you can handle it.
 * 5) Take the fountain firework outdoors and place it on a fire-safe surface, away from trees or buildings.
 * 6) Light the toilet paper tube on fire with a long-handled lighter or match. Move away from the fountain.
 * 7) After the firework is done, pour water on the area to make sure the fire is out.
 * 8) Repeat the experiment 2 more times: 1 with 1/4 cup of potassium nitrate and 2. with 3/4 cup potassium nitrate. Measure which firework makes the highest spark/flame

__**Task 6: Observation and discussion**__ media type="file" key="J and V movie2.mov" width="300" height="300"

__Experiment 1 Observations__

__Experiment 2 Observations:__

__Experiment 3 Observations:__

= __Task 7: Results__ =

of Sparks || Experiment 1: 1/2 cup sugar & 1/4 cup postassium nitrate || Experiment 2: 1/2 cup sugar & 1/2 cup postassium nitrate || Experiment 3: 1/2 cup sugar & 3/4 cup potassium nitrate ||
 * Height