Report

Yesterday and today i have been working on my introduction, discussion and conclusion of my report. I found the introduction the hardest and most time consuming of the whole report but i have finally completed it. I am now evaluating my report against the marking critria and making changes where needed.

Experiment

Today i completed all three trials of my experiment here are some pictures

table and graph

Hi Ms Sayer can you please check the table and graph and give me some feed back on them.

	How high the water travels up the paper towel (cm)
Brands and cost	Trail 1	Trial 2	Trial 3	Average
Coles home brand: $1.89 twin pack	2.7	2.7	2.1	2.5
Ultra: $2.99 Twin pack	5.1	5.3	5.1	5.1
Green Choice 100% recycled: $2.89 twin pack	5.2	6	5.2	5.4
Handee: $3.99 twin pack	5	4.3	4.9	4.7
Kleenex Viva: $3.49 twin pack	5.4	4.5	5.1	5

Hand-in

Today i handed in my plan for the report. I got feedback which will help me now. My plan was approved and now i just need to test it on the weekend.

Report plan

I have finished by whole report plan today as it is due in two day time. I think i will hand it in one day early so i can definately have mine back for the week end.

First stage of report

1 Week assignment was given
Today I started to do my scaffold i started with my aim and this was the first aim i wrote:

To investigate the absorbency of difference brands of paper towel using cm to measure how high the water goes up the paper towel.

I then fixed it saying:

To investigate the absorbency of different brands of paper towel when the paper towel is partly submerged in water for 20 sec. The height the water rises will then be measured using cm.

I was then happy with my aim as it states all the variables and is a specific statement. I then moved onto the hypothesis and my hypothesis states:

The cheapest costing brand paper towel will be the least absorbent because it is manufactured cheaper resulting in less plant fibre added.



I also completed the variable although i did get confused with the dependent and independent but figured them out in the end with help from my science book.

Plan for SRP Project

Week 1-during week	Week 1- weekend	Week 2- during week	Week 2- weekend
- Choose experiment - Make plan - Research all information	- write up aim, hypothesis,equipment and variables - Test experiment	-Finish writing scaffold - go over report and make better	- Go to the shops and buy all equipment needed - do experiment and collect all data

Week 3- during week	Week 3-weekend	Week 4- during week	Week 4- weekend
- Make a introduction, safety risk table and a results graph (based on experiment previously done on the weekend)	- re-do experiment to make the experiment more reliable and to make sure there was no mistakes last time - collect the data again	-write conclusion , evaluation and discussion - Make adjustment to the results table if need to.	- Evaluate the project against the marking rubric and make changes if needed to

My research for my 3 favourite experiments

1. COMPARE THE ABSORPTION OF DIFFERENT BRANDS OF PAPER TOWEL

The difference between paper towels and other types of paper comes when the paper fibers are mixed with a special type of resin to make them strong when they are wet.  This is why paper towel don’t rip as easily when wet. When the sheet are being manufactured they have shapes pressed into them to make them look quilted.  These shapes form air pockets to attract water.  That is why paper towels are so absorbent. Different brands of paper towels have different methods for manufacturing their paper towels. Therefore they should have different rates of absorbency.

2. DOES TEMPERATURE AFFECT THE TIME TAKEN FOR SUBSTANCES TO DISSOLVE IN WATER

When a solid substance, dissolves into a liquid substance, they react to form an intimate mixture called a solution. This process of dissolution will not occur if the particles of both substances are unable to bond together. For dissolution to occur requires energy, known as activation energy, to break and reconnect bonds. The temperature of a substance will affect the energy within the substance's molecules. This means that a solvent at a higher temperature should have more energy is the dissolution process making it easier to break form a solution. This would then be the opposite for when the temperature of the solvent is cooler.

·       3. HOW DOES THE HEIGHT OF A RAMP AFFECT THE TIME TAKEN FOR A TOY CAR TO REACH THE BOTTOM?

·       A child playing with a toy car illustrates Newton's three laws of motion. These three basic laws come into play whether the child is pushing the car across the floor or sliding it down a ramp. These are the laws:

1) An object at rest will stay at rest unless a direct force is exerted upon it.

2) Force equals mass times acceleration. The greater the acceleration required, the greater the force needed to act upon it.

3) Every action has an equal and opposite reaction. When a child pushes a toy car, it pushes his body back in the opposite direction.

The car accelerates as it comes down the ramp because of the effect of the parallel component of gravity on the car. This force pulls it down toward the bottom of the ramp. The greater the angle of the ramp, the stronger the parallel force of gravity is, and the faster the car will accelerate. Friction can also affect how fast the car goes down the ramp.