June 2016 archive

Scientific Lab Report

                                                             

 Title of experiment:

Dissolving Salt in Different Liquids.

Team members:   Juliet.

 

Aim: To observe which liquid salt dissolves the quickest in out of oil, vinegar, water, and lemon juice.

Hypothesis/Prediction: I think the salt in the oil won’t dissolve. I think that the water will dissolve but take longer. I think the vinegar or lemon juice will be the quickest probably the lemon juice because they are both very acidic but lemon juice is slightly more.

Materials:

  • Salt rocks (5-6 teaspoons in case you need extra).
  • ¼ (62 ml.) of a cup of room temperature lemon juice.
  • ¼ (62 ml.) of a cup of room temperature water.
  • ¼ (62 ml.) of a cup of room temperature vinegar.
  • ¼ (62 ml.) of a cup of room temperature rice bran oil.
  • 4 stopwatches
  • 1 measuring teaspoon
  • 4 glass beakers
  • A ¼ measuring cup

Method:

  • Pour out each liquid, (oil, vinegar, water, and lemon juice) in a glass beaker each.
  • Measure out 1 teaspoon of salt and at the same time tip in into the vinegar and start your 1st stop watch.
  • Measure out 1 teaspoon of salt and at the same time tip in into the water and start your 2nd stop watch.
  • Measure out 1 teaspoon of salt and at the same time tip in into the oil and start your 3rd stop watch.
  • Measure out 1 teaspoon of salt and at the same time tip in into the lemon juice and start your 4th stop watch.
  • As soon as the salt has fully dissolved in one of the beakers stop the stopwatch for that particular beaker.

Observations:  The oil didn’t dissolve at all, the lemon juice was in tiny pieces (almost dissolved). The vinegar was surprising because it was in bigger pieces than the water which  is not what I thought in my hypothesis. WIN_20160624_103134 (2)

Discussion:  The lemon juice was the quickest, it had nearly dissolved. This happened because lemon juice is very acidic and when an acid is strong it becomes more unstable therefore combining with other liquids to dissolve substances. The oil didn’t dissolve at all because it has no acid in it at all, so it is completely stable not allowing it to mix with other substances and dissolve things. Vinegar is also very acidic like lemon juice and water not so much. The only reason I can think of about why water was faster to dissolve than the vinegar is that the vinegar was a special type that has less acid in it or the temperature was different but it still make no sense.

Conclusion: The experiment was quite different to what I predicted while the oil didn’t dissolve like I said and the lemon juice was quicker but the water and the vinegar really surprised me, I predicted that the vinegar would be faster not the water. I don’t really know why the water worked better. Next time I would make sure all the liquids had the same time to dissolve the salt because that would change the results.

Bibliography:

Kindersley, Dorling, Wow! Science. , Penguin Books Australia, 27th of June 2011

Rice bran oil, 14th of June 2016, 18th of June 2016, https://en.wikipedia.org/wiki/Rice_bran_oil

What Is Lemon Juice Made Of? , 18th of April 2009, 18th of June 2016, http://www.lemon-info.com/2009/04/18/what-is-lemon-juice-made-of/

Acids, Bases, & the pH Scale. , 17th of June 2016,

http://www.sciencebuddies.org/science-fair-projects/project_ideas/Chem_AcidsBasespHScale.shtml2

Behind the news: Animal Testing.

This week we had to put our opinion into our b.t.n here is mine:

 
80% of countries in the world test beauty products on animals like dogs, cats, rats, rabbits, and more. I personally think that this idea is horrible. Here’s why:

Firstly the products are tested on animals to see if they are safe and if they’re not then how to improve them. But if they are not safe then the animals get hurt while they are testing them to see if they are safe which is no better than the humans getting hurt from them.

Secondly they are not kept in very good conditions so as well as not having a good life in the lab they also don’t have a very comfortable place to rest. If they were sold as pets they would have a much better life.

Finally other alternatives have been figured out like people giving tissue samples, artificial skin and body parts or by just using ingredients that are already known to be safe. In my opinion this is just a form of laziness because it wouldn’t actually be that hard to switch.

So in conclusion I think that testing beauty products on animals should be fully banned in all countries around the world because the animals get hurt, the are not looked after and there are other easy options. Thank you for reading this text and I hope I persuaded you that animal testing should be banned.

 

100 word challenge #12

prompt: Violin, Eaten, Yellow, Airplane, Swept

I had just eaten my juicy yellow pear when I heard the sound of a violin playing. I looked around wondering where it was coming from. I couldn’t see anything anywhere so I crept out of the dining room and into the laundry where I took out the broom and began sweeping. All of a sudden the violin stopped. I continued to sweep until I had swept away the very last leaf. I put the broom and a new noise started. It was the sound of an airplane motor. I was so confused, Mum said I was just hearing things but I was so sure it was real.

100 word challenge #11

The prompt was: a whistle blew and everyone disappeared. I decided to base the story around the prompt instead of using the exact words, I hope this is okay.

Story:                                                                                                                                             It was early Christmas morning when I woke up. I rushed out of bed. The only person awake was uncle Henry. He was more a grandpa than an uncle, he was so old. “You want your present? Here it is.” He handed me a small parcel. I teared it open, Henry always gives the best presents. Inside was a whistle. I fingered it for a second before asking, “What does it do?”
“Just blow it.” He replied before drifting off. So I blew. No sound came out. “I think it might be a dud.” There was no reply. “Henry?” I spun around. He disappeared! So that’s what this whistle does! Weirdest present I have ever gotten. It might come in useful though…

 

Behind the News: NAPLAN tests

Kids in years 3, 5, 7, and 9 take the NAPLAN tests in May every year. NAPLAN stands for National Assessment Program – Literacy and Numeracy. The people behind the tests reckon that going on-line to complete the tests will make them easier and faster to complete so starting next year, lots of schools will start to do the tests on-line. It would also allow students to answer different questions depending on their ability, as well as reducing the paper usage.  But some people don’t think it is such a good idea. They think that some schools won’t have the equipment or fast enough internet. They also think some kids might struggle if they haven’t used a computer much before. Personally I don’t really have an opinion, it would be good for the environment, but as a person has to do the tests I really do prefer pen and paper because I am not very good with technology and computers can glitch causing people to lose their work. And with pen and paper you can work out on them. You could just get some spare paper but then you wouldn’t really be saving paper.

100 word challenge:

Prompt: aaaa

‘Hallo friend!’ cried the old bronze man.
‘The name’s Rusty.’ he chuckled. ‘What’s your’s?’ The man who was sitting next to him shuffled across to the other side of the bench and continued to read. ‘I won’t bite!’ The man turned around. ‘I ain’t gonna do nothin’ to ya.’ Rusty persisted. The man finally answered. ‘Look cowboy just leave me alone! This food court is crowded, why don’t you go bother them! I just want to read my book.’ The man shouted. ‘Fine then, I’ll just sit here and wait till someone comes along.’ And the man sat there until he finally rusted.

Goals

Learning goals:

My first goal was to read more challenging books. I could ask my family or other people if they know any books or authors that I might enjoy. My next goal was to try to understand how decimals work and how you move them up and down a place. I was going to do this by asking Jude to set me extra work or ask family to help me. My last goal was, I understand solids, liquids and gases have different properties and behave differently.  I could do this by taking notes in class about their properties.

Student comments:

I achieved all my goals. The first one that I achieved was to read more challenging books. The books I read are ones that I thought were impossible but weren’t actually too hard. These were, ‘the hunger games 1 & 2’, ‘Inkheart’, and lots more. My second goal, wasn’t too hard to complete. I realised that I already knew how to do it but I didn’t get the terminology used to explain it. My last goal was also easy to complete. I learnt heaps of different properties of each state.

Teacher comment:

Future goals:

My first goal for the future would be to be more confident with public speaking because I know that next term we will be doing debates and I will need to be more confident. How I will achieve this is by practising in front of small crowds e.g. my family. My next goal would be to expand my vocabulary. I often struggle to think of more interesting words when I am writing. My last goal would be to be more organized with my homework and time management skills. I often leave stuff to the last minute.