Tag: Chemistry Tutoring

HSC Sciences – improving performance in extended responses

Like it or hate it, the way HSC science subjects (e.g. Physics, Chemistry, Biology) are implemented in our HSC requires students not only to have quantitative skills for calculation-type questions, but also be skilled in forming cohesive arguments to support a conclusion – much like essays in English, but about scientific issues. Many students don’t have as much trouble with the quantitative aspects of HSC sciences, but have issues consolidating the qualitative aspects of their courses for essay-type responses.

Summarise essay dot-points that have extended response requirements

It is a good idea to know which parts of the syllabus correspond to essay-type exam responses. As you learn the course, always cross reference the content you cover with the syllabus. Become strongly familiar with the syllabus dot-points for each module. You will notice that most subsections in each module (i.e. the numbered sub-parts in each module) will have one or two dot-points that require ‘discuss’ or ‘assess’ or ‘evaluate’ – words which require students to be able to synthesise content and form coherent arguments.

Familiarise yourself with these dot-points. Revise related content, or ask your teacher / tutor about the relevant issues for each, then make a short summary sheet (probably half a page for each) in dot-point form to lay out everything that’s relevant.

Here’s a couple of examples of how you might roughly summarise the essay requirements for a sample module.

HSC Chemistry

The Acidic Environment

1. Summarise the industrial sources of SO2 and NOx and evaluate the reasons for concern about their release into the environment. For example: SO2 is from coal burning and car exhaust, and causes acid rain. NOx is from automobile exhaust mainly, (older cars, or malfunctioning catalytic converters) and causes photochemical smog, acid rain etc.

2. Trace the developments in understanding of acid / base reactions. E.g. understand the main developments in our definitions of acids / bases, outline the concept of conjugates, discuss the validity of current definition of acids / bases compared to past definitions.

3. Assess the use of neutralisation as a safety measure / to fix acid spills. E.g. outline what buffers are and how weak bases can be useful in neutralising acids. Understand why a weak base instead of a strong base is used. Explain neutralisation and buffer systems in terms of Le Chatelier’s principle.
HSC Physics

Space

1. Contribution of Tsiolkovsky, Obert, Goddard, Esnault-Pelterie, O’Neill, or von Braun to the development of space exploration (i.e. modern rocketry). E.g. Robert H. Goddard, considered as ‘father of modern rocketry’ developed the world’s first liquid-fuel rocket, pioneered research into multi-stage rockets (allowed astronauts to reach the moon), research into gyroscopic stabilisation, and steerable thrusters, allowing greater, safer control of rockets.

2. Discuss issues with safe reentry into Earth’s atmosphere. E.g. backward-facing astronauts (eyeball-in effect is less stressful than eyeball-out), radio blackout prevents communication to ground base during most of re-entry. Optimum angle of re-entry ensures probe does not skip off atmosphere, or undergo excessive deceleration and heating. Heat shields carry away heat. Parachutes are required for final deceleration, or in the case of a shuttle, gliding like a plane.

3. Describe, evaluate and interpret the MM experiment’s results. E.g. the MM experiment produced a null result for the existence of the aether. This result alone does not disprove the aether’s existence, but it does not contradict Einstein’s Theory of Special Relativity. The latter was developed further and was successful in predicting real-world phenomena, such as time dilation / length contraction observed between inertial frames with relative motion.

4. Discuss the relationship between theory and evidence supporting it, using Einstein’s predictions. E.g. Einstein’s thought experiments were merely conjectures supported by logical deduction – at the time, there was no experimental way to verify Einstein’s predictions. In modern times, with the advent of atomic clocks and space flight, we are able to experimentally verify Einstein’s predictions as correct. The relationship is theory of the unknown comes from deduction of what is known, and experimental verification follows. If real-world results differ, the theory must be modified or superseded. This is the scientific method.

Do this for the entire syllabus, by first identifying which syllabus dot-points require an extended response in order to be tested in an exam. These dot-points are guaranteed to come up in your exams, either in your first assessment, half yearly, HSC trials, or the external HSC exams. Don’t leave this till last minute – familiarise yourself as you go through the course, then revise and re-familiarise. Be sure to include all of the relevant issues, some of which are latent and require deeper analysis. E.g. is Ethanol truly greenhouse neutral? You can argue yes or no, depending on what evidence you include in your response.

Finally, don’t be afraid of those 6 mark or 7 mark discuss / evaluate / assess exam questions. As long as you’re familiar with most of the relevant issues that particular question entails, you will be fine. Good luck!

Extracurricular Activities – During the HSC

If you want to apply for scholarships, go into Medical studies or get a highly sought-after part time job after leaving school; it is always a good idea to get some extracurricular activities under your belt during schooldays. On the downside though, good extracurricular activities often take a large amount of time, and might distract you from your studies. Therefore, it is important to practice time management.

In this article, we’ll take a brief look at what extracurricular activities you can do in high school that would help you with things like scholarships, entry into Medical College or while searching for a job later on.

Worthwhile Extracurricular Activities in High Schoolextracurricular-activities

Sportsextracurricular-activities2
As a high school student, the best activity to be involved in for most people is to get into some sort of sporting activities. Sports are an excellent to list on your resume, as it communicates several things to your interviewers:

  • You can work in a team (most sports are team-based)
  • You are competitive (that’s a great trait to demonstrate for things like scholarships and jobs)
  • You are a well-rounded individual (that is to say, you’re not just into computer games or Facebook)

The important thing here is to choose a sport that you truly enjoy. Do more than just play the sport – enter competitions, tournaments etc. This gives you more to talk about in an interview, other than merely saying “Oh I play soccer every weekend”. The point is to separate yourself from the rest – if you stand out, you will have a greater chance of success.

School related positions

High school students can also opt for school-related events or position. If you’re the School Captain, that’s an excellent portfolio. But even if you are not, try to be a School Prefect or an SRC representative. These positions convey that you possess leadership skills – a trait that is very favourably looked upon by interviewers for scholarships, entry into medicine or jobs.

Besides these, volunteer for as many things as you can at school which allows you to take responsibility for something. For example, if you’re good with computers, try to volunteer to help manage the school’s computer networks. If you have a knack for audio equipment, volunteer to help set up the audio equipment for the school hall for each event (e.g. dances, Talent Quests, general assembly’s etc).

Achievements

Extremely competitive activities such as joining the Maths, Chemistry, Physics or Biology Olympiads reflects very well on your abilities in these subject areas, as well as your ability to manage your time effectively. For things like academic scholarships and jobs that require related skills, such activities are worthwhile, should there arise an opportunity.

One-off activities

You can also consider participating in one-off volunteering / fund-raising events, such as things like “40-hour famine” or those like “Duke of Edinburgh” awards. Keep in mind that these are often of lower significance to your resume than on-going activities, or achievements mentioned above. Only do these if you really enjoy them.

During the HSC

You should be more careful about how you spend your time in year 12th. Generally, it is a good idea to pause most of your extracurricular activities once year 12th starts (i.e. end of term 3 of year 11), since HSC is most important at this time. If you can intelligently manage time with your management skills (which is also very important), you can easily choose to continue doing all activities related to school duty.

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