Nate #34

‘‘Convection Currents’’ , Practical Activities (pg125)

1) Explain what causes convection currents
Convection Currents occur by hot air rising and cold air sinking. This is because hot air is lighter wheras cold air is completley opposite meaning it is heavier.

2) Use a diagram to clarify what a ‘hot’ current does.

3) Identify the direction of a ‘cold’ current.
A cold current spins in an anti-clockwise direction

Conclusion

The hypothesis had turned out to be correct for thst the hot dye had risen and the cool dye had fell. This had been proven right because hot air is known to rise and cold air is known to sink.

 ‘‘Colliding Plates’’, Practical Activities (pg133)

‘‘Plates that Separate’’, Practical Activities (pg132)

1) Explain how this activity relates to the spreading at the mid-ocean ridges. 
This activity relates to the spreading at the mid-ocean ridges which refers to plates that separate. By the forming of an ocean ridge it requires plates that separate therefore they relate with each other. Plates are known to move extremely fast and generally a weakened fault line may form, causing huge valleys to for and magma fills it. The magma then cools and solidifies especially when it hits water.

2) Identify what in your model represents each of the following
a. Ocean Floor or plate – A4 paper
b. The water – The two desks
c. The lava flow – various layers that had been coloured
d. Gravity – the force of pulling.
e. mid-ocean ridge – glued division in the middle
f. The magnetic strips found in rocks parallel to the mid-ocean ridges - parallel to the lines my group had drawn

3) Describe what you noticed about the height of the paper as it emerged from the gap compared to the paper further out.
It had seemed to of rose higher to a new height.

4) Identify which of the strips you coloured would be the ‘oldest’ rock and which the ‘younger’ rock
The strip coloured yellow would be the oldest for that it was the furthest strip away from the central division line and the youngest rock would be the red strip for that it was the closest to the central division line.

5) Identify which of these strips would be the first to be ‘swallowed’ by an ocean trench.
The first strip that would be swallowed would be the yellow strip which is the oldest rock, would fall into the trench first.

Conclusion
The hypothesis written had been correct as research shows that the plates that separate usually occur due to natural disasters for instance earthquakes and volcanic eruptions.

What CST and IST grade what you allocate yourself for this project? Justify your response.

the grade that I would allocate my self would be a B although would love to say an A but overlooking the project I believe that my group marks could have pulled me away from that I A I had wanted for that a usb had broke on the last day making my group unable to submit out work on time and also I believe our time managing skills had been poor at times for that when my group heard of the extension of the project they had begun to slack off and waited for the last minutes.

What could you do tonight that would improve your grade?

Well tonight I can improve on my grade by reading over the rubric and double checking that everything in the rubric is contained in our clip and I can also post up more forums and diigo bookmarks to lift up my grades.
What grade do you think your team will give you for teamwork? Why?

I believe that my group will give me a 5 out of 5 for teamwork for that I had been the one keeping the group together reminding people about due date setting tasks out and helping fellow group members with what they are unsure of.

Thinking about your presentation on Monday, what do you need to do to score an “A” grade? (hint: Look at the presentation skills). What could you do before Monday, to ensure you receive an “A”?

For the presentation on Monday I believe I have to understand the whole content of the topic of racism to be prepared to answer any questions thrown at me by the audience, and I also will have to keep constant eye contact with the audience during my presentation.

Likes/dislikes of this project…any suggestions on how to improve???

Overall I believe that this project had been a fun experience for that we had don a several amount of practical involving lenses and mirrors. I had most especially like the splitting of the white light into rainbow colours prac for that it had turned out to be an amazing result. I don’t believe there had been any dislikes of the project but just to have the folders to be plastic sleeve folders because it is a hassle having all the sheets falling out of the cardboard folder.

What areas do you think you have improved in from project 1 to 4?

I believe that I have found an improvement in my prac report writing skills I believe that I am able to create a well written report on many kinds of practicals and to me that is a huge improvement.

What further skills would you like to develop over the next few projects?

Some skills that I would like to develop over the next science projects is to improve on my time management and my neatness, for that at times I believe I can be well more punctual to my classmates and teachers.

Analyse why red sunsets can sometimes be more impressive when there is more dust or pollution in the air than usual.

Blue skies and red sunsets are not caused by refraction, but by another phenomenon known as scattering. Scattering is molecules of gas and dust particles in the atmosphere which alters the direction of light rays. Blue rays tend to scatter more than other colours of the spectrum. Blue light against the dark background of space causes the sky to appear blue. At sunrise and sunset, when sunlight travels further through the atmosphere, almost all of the blue rays are scattered and the light that reaches us is mainly red or orange.

Describe what happens inside water droplets to cause a rainbow and explain how you can tell whether a rainbow is a primary or secondary.

Small droplets of water behave like tiny prisms in the sky. Sometimes the colours will reach our eyes after refracting and undergoing total internal reflection. A primary rainbow is a band in the sky with red at the top and blue at the bottom. Secondary colours include of cyan, magenta and yellow.

Reference;
Taken from Science Focus 3 text book pages 110-111

Short and Long sightedness,

What Causes the defect?

The cause of short sightedness is by certain diseases or drugs and it can also be the first sign of type 2 diabetes.

The cause of long sightedness is through your family, it has been identified as a gene. It is said that many children are born with long sightedness as it resolves itself as they grow older and their eyes develop.

The symptoms displayed?

The symptoms for short sightedness are that they would not be able to see objects or things from far for that it would appear blurry or out of place.

The symptoms for long sightedness are that a person is unable to see or read something close by such as book or computer screen. It is said that if parents suffer from long sightedness, there is a chance that the child he may have might also have too.

Propose what sort of lens may be used to correct each vision?

Short sightedness is corrected by wearing spectacles with concave lenses.

Long sightedness is corrected by wearing spectacles with convex lenses.

What influences your values about issues relating to your life?

Many things have influenced my values such as the media, my culture, my family, friends and many other things. The media had influenced my values because I always tend to hear and read a lot of media and I tend to believe on what it says from the different ranges of Medias such as television broadcast, radio broadcast and newspapers. The media has practically been my own personal dictionary to the events of life.

Do you ever compare images/values presented by the media to those of the bible? If so why? If not, why not?

At times it maybe yes and there is times when I don’t compare images/ values of the media to those of the bible. At times I do refer to the bible because I always think a lot and so when I see an act of violence or rape I always think how Jesus said that we should love one another and also your neighbour even if they have done wrong. But there are also times when I do not look and think of the bible because an article can get so interesting that you want to know more of the article and the bible just does not come into place when the article is being read.

Has this project challenged you to examine your values? Why / Why not

Yes this project has challenged me to examine my values because most of my values have been relied with the media giving me the answers to the wrongs and rights. Therefore it deals with things that may relate to us and be useful in the near future. And so I need to consider on my thoughts of my own values

Fibre optic technology offers many advantages when used in medical applications.

Describe how optical fibre may be used in medical applications

Fiber-optic communications is based on the fact that light within a glass medium can carry more information over longer distances than electrical signals can carry in a copper or coaxial medium.

Identify the traditional medical techniques that optical fibres might replace.

Optical fibres will replace the use of copper wire for that they are thinner, cheaper and more durable than copper wire. They also can transmit more information.

Evaluate the benefits of fibre optic technology to medicine

Fibre optics will help doctors because if there was an untreatable tumour may be destroyed by a laser light sent down an optic fibre cable.

How do you feel the media portrays social justice issues?

I find it at times a newspaper article can become misleading for that a reporter may write quotes or information that had been passed on by others and had been paraphrased by them ending up with a phrase that had been altered 10 times until it got to you leaving u with what can be true or false.

Has it been difficult to find articles on social justice issues why/why not?

Yes, for me I had found it hard to find articles on racism and especially finding multiple media types of one huge racial act.

Do you think that the media operates from a moral framework? Give evidence by using your research.

To some extent I believe that they do work from a moral framework, for instance a journalist job is to produce a report within a day so he doesn’t get fired and so the journalist only collect the information from the media of what’s been given to them and don’t even bother checking if the information collected is even true and so publishers are publishing the works of others that can turn out to be a misleading article meaning inaccurate.