Friday 26 February 2016

May the force be with you...




Here is a list of questions we will be exploring in the topic of forces this week:
  • What is a force?
  • What is the unit of force?
  • Describe three forces and their effects



Why do we get blisters?
  • What is friction?
  • Name three examples of friction from everyday life
  • Explain the effect of lubrication

We will be using springs and weights in some lessons... 
  • Investigate the relationship between the extension of a spring and the applied force
  • What is Hooke’s Law?


  • What is weight
  • Is weight a constant value? 
  • What is the difference between weight and mass?
  • What is the relationship between the mass of an object and its weight in newtons on the surface of the earth?



What on earth does he mean? ;) 
  • Find the centre of gravity of a thin lamina;
  • Investigate the role of centre of gravity in design for stability and equilibrium



Why is that a horrible present???!
  • Investigate the law of the lever
  • Name two everyday applications of levers



Work is done when a force moves an object... 
  • Define and give the units for work, energy and power
  • State the relationship between work and power and perform simple calculations based on this relationship



Thursday 4 February 2016

Digestion and Enzymes Videos

Ms. McCarthy 

Here are some of the videos I showed in class recently. I have included some additional videos to help you develop your understanding of the digestive system.

Ingestion 

X-ray video of person swallowing coloured drink
Click on the picture to see the gif 

Digestion




Enzymes 

An enzyme is a biological catalyst.

  • made of protein
  • alters the rate of a chemical reaction without being used up in the reaction 




Absorption 


Wednesday 3 February 2016

Student spotlight: what is an atom?

This article was researched and written by Stevie Girasole. Great work Stevie! 

Atoms are the basic building blocks of ordinary matter. Atoms can join together to form molecules, which in turn form most of the objects around you. Atoms are composed of particles called protons, electrons and neutrons, according to Oxford English online dictionary.





As you can see from the diagram above, atoms are inside the nucleus all bundled up with protons and neutrons to form ordinary matter. The electron moves around the nucleus in a somewhat circular motion.

There are ninety naturally occurring types of atoms, and scientists have discovered how to make around twenty more.


http://ed.ted.com/lessons/just-how-small-is-an-atom 

Tuesday 2 February 2016

Cobh Scientist: Paul Buckley, Atmospheric Chemistry

Paul Buckley is a past pupil of Coláiste Muire. This year, he started his PhD in Atmospheric Chemistry. Paul kindly agreed to answer some questions we had on how he decided on a career in Chemistry and showing us what his job looks like on a normal day. 

Interview questions by Eireann Griffin and Abby O'Donnell. Well done girls. 

What inspired you to pick your career? 

The main inspiration for picking my career was the project which I would be working on. It's a national campaign measuring emissions from domestic fuel burning. The opportunity to work on a campaign, the results of which will be debated in the Dáil, have national policy implications and possibly even shape European policy about air quality really helped me with my decision to enter research. I also have a strong interest in the health effects of air quality and this job allows me to continue researching the topic.



How long was your college course?

My college course was four years; I did the Chemistry course in UCC. The PhD in Atmospheric Chemistry will take at least four years to complete.

What is the most challenging part of your job?

Like every job there are certain challenging aspects. Conducting a measurement campaign involves a lot of logistical and practical difficulties which can be difficult to overcome. It can also involve spending long periods of time alone. A six week campaign utilizing ten instruments produces a lot of data which takes a very long time to analyse. There are also some safety concerns with the job, while I don't work with any hazardous chemicals I do work with some very high powered lasers which, if handled incorrectly, can cause serious injury. 



Whats the most enjoyable aspect of your job?

The most enjoyable aspect of my job is the fact that there are a lot of opportunities for travel. Once a campaign is finished and the data has been analysed there are many conferences, both in Ireland and abroad. This year the group which I am part of will be attending at least two conferences, an Environmental Science Association of Ireland conference in Limerick and a European Air Quality conference in France. Also, there are many opportunities to visit other universities to go on courses or conduct research. For example, I will be travelling to Japan and the University of Kyoto to study for three weeks.

What is your job title?

I am a Postgraduate Researcher in the Center for Research into Atmospheric Chemistry (CRAC) in UCC.

What is the key to success in your career?

The key to being a successful researcher is a lot of patience as things can often not go according to plan and analyzing the data takes a lot of time to complete. Good computer skills are also essential and an ability to fix any mechanical problems the instruments may have. Good presentation skills are essential as the results of the project have to presented at many conferences and meetings, often in front of large crowds of people.



What did you like the most about Junior Cert Science? 

In Junior Cert science it was the chemistry section which mainly caught my attention, in particular the introductions to Atomic Structure and Bonding. I enjoyed the Light section of the Physics course and in the biology section I enjoyed learning about the various systems in the body.

Which science subjects did you study in Leaving Cert and what did you enjoy about them?

In Leaving Cert science I took Chemistry and Physics. In Chemistry I again enjoyed the Atomic Structure and Molecular Structure sections, I also enjoyed the Atmospheric Chemistry section and the Environmental Chemistry section on water. In Physics I enjoyed learning about Light, its various properties and how to manipulate it, I also enjoyed the section on Modern Physics learning about the electron, nucleus and nuclear energy. I found the Particle Physics section to be the most interesting part of the Physics course.

What other subjects did you enjoy in secondary school?


I obviously enjoyed Chemistry in secondary school but I also really enjoyed Physics. Outside of science, I really enjoyed History and French.

Thank you Paul for taking the time to answer all our questions! 

Student spotlight: bloody good

This article was researched and written by David Oki. Well done David! 

Blood is made up of watery plasma in which three types of cell are suspended: red blood cells, white blood cells and platelets.      

This video shows how centrifugation (spinning a test tube of blood at high speeds) is used to separate blood into its components.  


                                                         

Plasma                       

Plasma is 90% water and contains dissolved substances such as glucose, amino acids, fatty acid, mineral, vitamins, carbon dioxide, urea, hormones, antibodies and large soluble protein.  

Red blood cell           

Biconcave discs, with no nucleus or mitochondria. They live for 120 days and are then broken down by the liver. They are made continuously in the red bone marrow of the sternum, ribs and vertebrae. They contain the red, iron-containing chemical haemoglobin which can combine with oxygen to form oxyhaemoglobin.      
Image result for red blood cell structure

White blood cells                              

Larger and less numerous than red blood cells, they have a nucleus. They protect the body against disease. There are two types: monocytes and lymphocytes. Monocytes have a lobed nucleus and tiny granules in the cytoplasm. They engulf bacteria by phagocytosis.                                          

Platelets                                    

These are fragments of cells formed in the red bone marrow. They have an important role in clotting of the blood.