Science

Thursday 5th may __** Experience Gravity Free Water ** __ Explanation: I thought that the gravity free water could not be real, I was wrong it is real and it was amazing it just sucked out all the air and stuck to the cardboard.

Monday 2nd may __**Colour disk spining top**__ Explanation: I made the colour disc spining top and the colour looked like a big flash of different colours all in one place When I spun it.

Tuesday 3rd may
 * 1)  Aim (or question)-all experiments always start with a question and the whole aim of the experiment is to find an answer to this question.

Aim: What metal conducts heat faster: steel, aluminum, copper or brass?

Hypothesis (prediction): I think that steel will be the fastest conductor of the heat because cars are made of steel and cars catch fire a lot.

I think that aluminum will be the slowest conductor of the heat because aluminum is probably the thickest out of all of them.

Method: Variables: controlled variables size of metal, type of wax, environment and manipulated variables. Materials.

Procedure: Detailed, step - by - step description of how you conducted.

Method:

Procedure:

1. We put small pieces of wax in the hollows on the ends of 4 strips of different metals that were fixed on a round wooden frame.

2. We heated the metal strips.

3. We timed the melting of the wax.


 * 1) We recorded the times in a table.

Results:

The wax melted in the following order:


 * Table 1: Time taken for wax to melt (seconds) ||
 * || Copper || Steel || Brass || Aluminum ||
 * Group1 || 3.39 || 5.35 || 2.39 || 1.22 ||
 * Group 2 || 51 sec || 6.23 ; || 3.55 || 1.22 ||
 * Group 3 || 1.05 || 4.54 || 53 sec || 37 sec ||
 * Group 4 || 13 sec || 21 sec || 3.27 || 52 sec ||
 * Group 5 || 1.30 || 2.36 || 1.28 || 10.1 ||
 * Group 6 || 2.21 || 3.57 || 36 sec || 3.19 ||
 * Our group || 35 sec || 3.27 || 3.58 || 43 sec ||
 * Group 8 || 45 sec || 8.14 || 1.00 || 15 sec ||
 * Group 9 || 52 sec || 26 sec || 1.23 || 5.10 ||
 * Group 10 || 31 sec || 44 sec || 35 sec || 5.38 ||
 * Average ||  ||   ||   ||   ||

Our Group found that the wax melted in the following order:

1st _ 2nd _ 3rd Last _

The class average:

1st _ 2nd _ 3rd Last _

Conclusion:

On Average the wax melted in the following order:

1st _ 2nd _ 3rd Last _. We noticed that................happened.

The wax melted fastest with the because the molecules are easer to move than in the other metals and this is what makes the heat travel through the metal. This is called “heat conduction”. Where the molecules are more difficult to move, heat takes more time to move through it.

Conduction occurs when the molecules bump against each other and cause more movement. It is like pushing someone who trips and pushes another person in a crowd and the movement ripples outwards.

We use copper metal in_ because we want heat to _;

we use steel in so that heat doesn’t_.

Brass is used in taps because. Aluminum is used in pots because_. All of these metals do get hot after a while such as_.

Plumbers/engineers/sheet metal workers use because it is easy/hard to transfer heat. This is good/a problem because_.

Cooks prefer because _, however they need to be careful that food may burn.

A welder uses _ to braise metal because it is easy to melt but the welder is made of which gets hot but not too hot.

Science Fair Due Friday 3 June Week 5 = = =__ Science Fair __ =

Please have a close read of the following site that Mr Marsh has put together. @http://ourspace.tauranga-int.school.nz/course/view.php?id=64

[|ScienceFairBooklet.pdf]
 * [[image:http://c1.wikicdn.com/i/mime/32/application/pdf.png height="32" caption="external image pdf.png" link="http://rimuroom42.wikispaces.com/file/view/ScienceFairBooklet.pdf"]] ||
 * external image pdf.png ||

Useful Science sites for ideas: @http://www.sciencebuddies.org/ @http://www.all-science-fair-projects.com/

Cool Science Sites @http://www.sciencelearn.org.nz/

====Please Note: ==== ====This table is different from the one outlined in the above Science Fair booklet. There will be __**no extensions**__ given, Class time will be given for writing up aim, hypothesis, instructions, explanations, diagrams, tables etc and putting displays together. Parents please support your child with carrying out their experiments as this will be the main element of their homework during Science Fair. ====


 * ||  || **Order of Events** ||   || **Timeline** ||


 * 1 ||  || Choose a topic including is it a //Science or Technology// display ||   || Week 1 ||


 * 2 ||  || <span style="font: normal normal normal 14px/normal 'Times New Roman'; letter-spacing: 0px; line-height: 19px; margin: 0px;">Completed Aim and Hypothesis (science) or Question (technology) ||   || <span style="font: normal normal normal 12px/normal Helvetica; letter-spacing: 0px; margin: 0px;">Week 2 ||

<span style="font: normal normal normal 12px/normal 'Times New Roman'; line-height: 19px; margin: 0px;"><span style="font: normal normal normal 12px/normal Webdings; letter-spacing: 0px;"> //What do you need?// <span style="font: normal normal normal 12px/normal 'Times New Roman'; line-height: 19px; margin: 0px;"> <span style="font: normal normal normal 12px/normal Webdings; letter-spacing: 0px;"> //Who do you use?How many?// <span style="font: normal normal normal 12px/normal 'Times New Roman'; line-height: 19px; margin: 0px;"> <span style="font: normal normal normal 12px/normal Webdings; letter-spacing: 0px;"> //What help do you require?// <span style="font: normal normal normal 12px/normal 'Times New Roman'; line-height: 19px; margin: 0px;"> <span style="font: normal normal normal 12px/normal Webdings; letter-spacing: 0px;"> //How will you measure and collect data?// <span style="font: normal normal normal 12px/normal 'Times New Roman'; line-height: 19px; margin: 0px;"> <span style="font: normal normal normal 12px/normal Webdings; letter-spacing: 0px;"> //How many trials/experiments/prototypes will// //you complete?// <span style="font: normal normal normal 12px/normal 'Times New Roman'; line-height: 19px; margin: 0px;"> <span style="font: normal normal normal 12px/normal Webdings; letter-spacing: 0px;"> //How will you present data? Numbers are good!// <span style="font: normal normal normal 12px/normal 'Times New Roman'; line-height: 19px; margin: 0px;"> <span style="font: normal normal normal 12px/normal Webdings; letter-spacing: 0px;"> //Do you need to complete a Animal Ethics form?// ||   || <span style="font: normal normal normal 12px/normal Helvetica; letter-spacing: 0px; margin: 0px;">Week 2 ||
 * <span style="font: normal normal normal 13px/normal Arial; letter-spacing: 0px; line-height: 19px; margin: 0px;">3 ||  || <span style="font: normal normal normal 14px/normal 'Times New Roman'; letter-spacing: 0px; line-height: 19px; margin: 0px;">Planned how you are going to complete experiments (science) or investigation of needs assessment and prototype design (technology)


 * <span style="font: normal normal normal 13px/normal Arial; letter-spacing: 0px; line-height: 19px; margin: 0px;">4 ||  || <span style="font: normal normal normal 14px/normal 'Times New Roman'; letter-spacing: 0px; line-height: 19px; margin: 0px;">Start experiments (science) or needs assessment (technology) ||   || <span style="font: normal normal normal 12px/normal Helvetica; letter-spacing: 0px; margin: 0px;">Week 3 ||


 * <span style="font: normal normal normal 13px/normal Arial; letter-spacing: 0px; line-height: 19px; margin: 0px;">5 ||  || <span style="font: normal normal normal 14px/normal 'Times New Roman'; letter-spacing: 0px; line-height: 19px; margin: 0px;">Needs assessment (technology) completed ||   || <span style="font: normal normal normal 12px/normal Helvetica; letter-spacing: 0px; margin: 0px;">Week 3/4 ||


 * <span style="font: normal normal normal 13px/normal Arial; letter-spacing: 0px; line-height: 19px; margin: 0px;">6 ||  || <span style="font: normal normal normal 14px/normal 'Times New Roman'; letter-spacing: 0px; line-height: 19px; margin: 0px;">Experiments (science) and prototype testing (technology) completed ||   || <span style="font: normal normal normal 12px/normal Helvetica; letter-spacing: 0px; margin: 0px;">Week 3/4 ||


 * <span style="font: normal normal normal 13px/normal Arial; letter-spacing: 0px; line-height: 19px; margin: 0px;">7 ||  || <span style="font: normal normal normal 14px/normal 'Times New Roman'; letter-spacing: 0px; line-height: 19px; margin: 0px;">First draft completed ||   || <span style="font: normal normal normal 12px/normal Helvetica; letter-spacing: 0px; margin: 0px;">Week 4/5 ||


 * <span style="font: normal normal normal 13px/normal Arial; letter-spacing: 0px; line-height: 19px; margin: 0px;">8 ||  || <span style="font: normal normal normal 14px/normal 'Times New Roman'; letter-spacing: 0px; line-height: 19px; margin: 0px;">All written work, diagrams, tables, graphs, photos, and other graphics completed and checked by the class teacher **BEFORE** it is attached to the display ||   || <span style="font: normal normal normal 12px/normal Helvetica; letter-spacing: 0px; margin: 0px;">Week 5 ||


 * <span style="font: normal normal normal 13px/normal Arial; letter-spacing: 0px; line-height: 19px; margin: 0px;">9 ||  || <span style="font: normal normal normal 14px/normal 'Times New Roman'; letter-spacing: 0px; line-height: 19px; margin: 0px;">**Completed display ready to be marked by teacher** ||   || <span style="font: normal normal normal 12px/normal Helvetica; letter-spacing: 0px; margin: 0px;">Monday Week 6 ||

Topic: Which is the best fire extinguisher to put out a petrol and diesel fire.

Aim: To find out which fire extinguisher can put out a petrol and diesel fire the best.

Hypothesis: I think that the dry powder extinguisher will work the best on the liquid fire because a liquid fire is wet and the dry powder will dry it up.

What I need: A carbon dioxide extinguisher, an H20 (water) extinguisher, a dry powder extinguisher, petrol and diesel and barrel.

Method: First I will fill the drum with a little bit of water then petrol and diesel, after that I will light a rag on a long metal pole with a lighter. Next I will grab a fire extinguisher and put it out while my sister times it with a stop watch (I will repeat this 5 times with the different extinguishers).

Tuesday 7 June



**Science Fair Marking Term 2 2011** ☒ Not achieved ☑ Achieved ☑☑ Advanced

**Scientific Process and Background:** ☑☑ Clear aim/hypothesis carried through ☑☑ Method, accurate experimentation ☑☑ Accurate experimentation, controls, variables, repetitions ☑☑ Results clear, accurate, include appropriate data ☑ Conclusions are in line with aim/hypothesis ☑☑ Results are interpreted and discussed (conclusion)

**Technical Skill:** ☑☑ Design of the experiment ☑☑ Use of apparatus and materials

**Originality:** ☑☑ Imaginative/creative ideas ☒ New/Unusual application in science

**Presentation of Display:** ☑☑ Colour/form/clarity/graphics ☑☑ Innovative appeal

**Log Book:** ☑☑ Authentic ongoing record with raw data included ☒ Has supporting documentation, bibliography, acknowledgements

**Teacher Comment: What a fantastic display Karl, the use of photos is great and I love the bold title you have. It is great to see that you have included the science behind your results I can tell that you have learnt heaps during the last 6 weeks and how you explain it shows a true understanding of how fire extinguishers work. Well done Karl.**

**Student Comment:**

Introduction: One day I thought about fire (because my dad is a fireman) and wondered, if there was a petrol and diesel fire and I were to grab any fire extinguisher what would be the best one to put it out?

Aim: To find out which fire extinguisher can put out a petrol and diesel fire the best.

Hypothesis: I think that the dry powder extinguisher will work the best on the liquid fire because a liquid fire is wet and the dry powder will dry it up.

What I need:
 * Carbon dioxide extinguisher
 * H20 (water) extinguisher
 * Dry powder extinguisher
 * Petrol and diesel
 * Barrel
 * Flame proof jacket and helmet
 * Metal pole with rag
 * Camera
 * Stop watch
 * Helpers and supervision

Method:


 * 1) Fill the drum with a little bit of water then petrol and diesel one after the other.
 * 2) After that you light a rag on a long metal pole with a lighter and carefully dip it into the drum with the petrol and diesel in it to start the fire (you might want to get an adult to do this step).
 * 3) Next grab the water extinguisher and stand about 5 meters away from the fire. Attempt to put it out while being timed with a stop watch, if it puts it out re-light the fire as shown in step 2 and record how long it took to put the fire out (do this 5 times).
 * 4) Now grab the CO2 extinguisher and attempt to put it out while being timed with a stop watch, if it puts it out re-light the fire as shown in step 2 (do this 5 times).
 * 5) Then grab the dry powder extinguisher and attempt to put it out while being timed with a stop watch, if it puts it out re-light the fire as shown in step 2 (do this 5 times).

What I did: In the car I was excited, confused and worried about what I was going to do when we got to the farm. I kept asking if we had everything we needed and everyone said yes. When we got there I unloaded my stuff, put my jacket and helmet on and set up my gear for the experiments. I filled the barrel with some water then petrol and diesel and after that I lit a rag on a long metal pole with a lighter (this is my lighting rod). Then I grabbed the water extinguisher, which was the heaviest bottle, and attempted to put it out. I did this experiment five times. Next was the CO2 (carbon dioxide) extinguisher, this was the smallest bottle and it was a powerful blast of CO2. I squirted that at the fire and did this experiment five times. Finally I did the dry powder extinguisher, this heavy bottle squirted out a blast of sticky powder. I did this experiment five times.

Results:


 * Water: The water extinguisher just made the flame grow and spark but it did not put the fire out.
 * CO2: After a few goes it finally put the fire out but it took a long time for the flame to die and after it died the liquid was boiling.
 * Dry powder: With little squirts of the extinguisher it slowed the fire down but didn’t put it out and with a big squirt it covered the fire and put it out in less than 2 seconds.

Conclusion:

My hypothesis was half correct because I thought it was the dry powder and that the extinguisher would dry the fire up. The part that it would dry up was wrong but the dry powder extinguisher was the best. The explanation for the results is the water extinguisher didn’t put it out because all the water does is splash the fire around which causes the fire to spread out and that leads to a bigger fire. With the CO2 extinguisher it took a few goes to put out the fire, now this is because the CO2 is a gas and it goes on top of the fire, puts it out and then it all floats away and the fire can start up again. The dry powder extinguisher is different. It’s almost the same as the CO2 but instead of floating away it stays on the fire and acts like a big blanket to take away all of the fire’s oxygen. The overall reason of why some things worked and some didn’t work all leads to the fire triangle, according to the fire triangle a fire needs 3 things to survive. Take one of these away and the fire will go out So if you are in a petrol and diesel fire I would use a dry powder extinguisher to put it out. P.S: You could also use a CO2 extinguisher if you wanted but it’s just not as good. P.P.S: DONT forget to call 111 after you have attempted to put it out!
 * 1) Fuel (petrol and diesel).
 * 2) Oxygen.
 * 3) Heat.

Graph

Log book:


 * Week one: I have chosen my topic for the science fair and have thought about where I am going to do it, what my hypothesis is, what my aim is and what I need.
 * Week two: I have now purchased my science board and thought about where I am going to put some of the things I already have. My dad has now brought home my extinguishers, my jacket, my helmet, the petrol, diesel and the barrel.
 * Week three: I am designing my heading for the top of my science board. We are now planning a fine day at the farm to do my experiments.
 * Week four: Its sunday the 15th of may and we are doing my experiments up at the farm and the fires are HUGE. The water extinguisher isn’t putting the fire out, the CO2 is taking a while to put it out but it finally has but the dry powder has put it out in less than 2 seconds, WOW.
 * Week five: I have chosen my photos that will go on the board and I have printed them out ready to be laminated. At school I have written most of my work down and printed most of it out, I have also finished my graph. For my science board I have chosen to put coloured paper on it and I have started to glue those on.
 * Week six: I have now laminated my photos that I chose last week and I am ready to put them on my science board. I have also finished all my written work that I did at school and I am ready to put them on the board too. Finally now I am putting everything that I need to put on to my science board, my photos, my written work and my pictures. Now I am done and ready to hand in my science board.