Showing posts with label practice. Show all posts
Showing posts with label practice. Show all posts

More free GAMSAT study resources

I note that a lot of the free resources I linked previously are out of date, so here are some updates:

Des O'Neill appears to have retired from the GAMSAT preparation business as of 2015, according to his website.

ACER, according to their '16 Info Booklet, now provides a Sample Questions e-book with registration for the GAMSAT. They also have a Practice Test and Practice Test 2 available for sale, which are full-length tests, as well as Practice Questions. Sample Questions and Practice Questions include worked answers. ACER is also offering computer-based scoring for the Written Communication section. These can be purchased after registering with ACER here. ACER also offer brief preparation tips.

PrepGenie.com.au offer a 'free' GAMSAT mock test for $1 here.

e-gamsat is offering a free GAMSAT practice test with suggested timings, as well as further hints and tips.

MedPrep International used to have a practice exam which is still available on the Internet Archive here. I think they're now operating as Medired, and have an online practice test available here.

The amazingly helpful PagingDr forum has collated a practice test available here.

Gold Standard Gamsat at Gamsat-Prep.com offer a free practice test after account creation here. Gold Standard GAMSAT also have 100+ videos on Youtube, including worked solutions to questions in the ACER booklets.

Youtube has a variety of channels with GAMSAT and interview tips, like The Medical Method, Second Degree Medicine, PrepGenie, and Gold Standard on Section 2 tips.

gamsat.co.uk, which now appears to be abandoned, had a GAMSAT practice test which is still available via the Internet Archive here.

I hope these free resources are helpful in your study. I recommend using practice tests to identify problems with test timing and identifying knowledge gaps.

Section I Practice Question - Sokal vs Social Text

This practice question is taken from the Australian Law Schools Entrance Test (ASLET), also administered by ACER. Their information PDF for test-takers contains a selection of useful GAMSAT-style questions, one of which I have reproduced here. You will notice the extremely long passages used for these questions; however, you do get to answer a heap of questions from them!

Questions 22 –29

In 1996, a leading academic journal of cultural studies, Social Text , published an article by a physicist named Alan Sokal. The article attacked the sciences for their ‘authoritarianism and elitism’ and argued, amongst other things, that physical concepts (ssuch as gravity) were essentially ‘social constructs ’. Subsequently, Sokal revealed in a rival journal that the article had been a hoax. In the following two passages Sokal and the editors of Social Text justify their actions.

Passage 1: Alan Sokal
Why did I do it? While my method was satirical, my motivation is utterly serious. What concerns me is the proliferation, not just of nonsense and sloppy thinking per se, but of a particular kind of nonsense and sloppy thinking: one that denies the existence of objective realities, or (when challenged) admits their existence but downplays their practical relevance. At its best, a journal like Social Text raises important questions that no scientist should ignore – questions, for example,about how corporate and government funding influence scientific work. Unfortunately, epistemic relativism does little to further the discussion of these matters. Social Text’s acceptance of my article exemplifies the intellectual arrogance of Theory – meaning postmodernist literary theory – carried to its logical extreme.No wonder they didn ’t bother to consult a physicist. If all is discourse and ‘text’, then knowledge of the real world is superfluous; even physics becomes just another branch of Cultural Studies. If, moreover, all is rhetoric and ‘language games ’, then internal logical consistency is superfluous too: a patina of theoretical sophistication serves equally well. Incomprehensibility becomes a virtue; allusions, metaphors and puns substitute for evidence and logic. My own article is, if anything, an extremely modest example of this well-established genre.

Passage 2: The editors of Social Text
Obviously,we now regret having published Sokal ’s article, and apologize to our readers, and to those in the science studies or cultural studies communities who might feel their work has been disparaged as a result of this affair. From the first, we considered Sokal’s unsolicited article to be a little hokey. It is not every day we receive a dense philosophical tract from a professional physicist. Not knowing the author or his work, we engaged in some speculation about his intentions, and concluded that this article was the earnest attempt of a professional scientist to seek some kind of affirmation from postmodern philosophy for developments in his field. His adventures in Postmodern Land were not really our cup of tea. Sokal ’s article would have been regarded as somewhat outdated if it had come from a humanist or social scientist. As the work of a natural scientist it was unusual, and, we thought, plausibly symptomatic of how someone like Sokal might approach the field of postmodern epistemology, i.e. awkwardly but assertively trying to capture the ‘feel ’ of the professional language of this field, while relying upon an armada of footnotes to ease his sense of vulnerability. In other words, we read it more as an act of good faith of the sort that might be worth encouraging than as a set of arguments with which we agreed. On those grounds, the editors considered it of interest to readers as a ‘document’ of that time-honoured tradition in which modern physicists have discovered harmonic resonances with their own reasoning in the field of philosophy and metaphysics.What is the likely result of Sokal’s behaviour for non-scientific journals? Less well-known authors who submit unsolicited articles to journals like ours may now come under needless suspicion, and the openness of intellectual inquiry that Social Text has played its role in fostering will be curtailed.

22. Sokal’s method may be described as satirical because it involved
a) insincere imitation.
b) humour and innuendo.
c) unfair and deceptive means.
d) unfavourable analysis and criticism.

23. The term ‘epistemic’ refers to our knowledge of things rather than to the nature of the things themselves.
Accordingly, the phrase ‘epistemic relativism’, as used in Passage 1, most likely refers to
the idea that
a) knowledge is objective and eternal.
b) all knowledge is subjective and equally valid.
c) all knowledge is approximate and provisional.
d) knowledge is determined and controlled by political interests.

24. For Sokal, the logical extreme of postmodernist literary theory involves the notion that
a) reality defies language.
b) language distorts reality.
c) language has no meaning.
d) language constitutes reality.

25. The editors attribute their decision to publish Sokal’s article to
a) their intent to embarrass the author.
b) an inexplicable lapse in their judgement.
c) their professional openness and impartiality.
d) their desire to avoid criticism for not publishing it.

26. The editors’ justification of their decision to publish Sokal’s article reveals that they were unduly influenced by
a) the author’s reputation.
b) the presumed motivation of the author.
c) their elitist and guarded approach to their discipline.
d) their own tastes and preferences in scholarly writing.

27. The phrase ‘needless suspicion’ may be judged unintentionally ironic because
a) such a claim is easily made in hindsight.
b) the editors are unlikely to be sincere in making the claim.
c) the editors were, if anything, too suspicious of Sokal’s article.
d) such suspicion would appear to be normally warranted and necessary.

28. The justification offered by the editors for publishing Sokal’s article is best described as
a) assured and persuasive.
b)condescending and contradictory.
c) arrogant but fundamentally sound.
d) unnecessarily humble and apologetic.

29. Which of the following is the most significant conclusion that can plausibly be drawn from the ‘Sokal Affair ’ in the
light of the two passages?
a) It shows that scientists do not fully comprehend postmodern literary theory.
b) It suggests that the editors of Social Text did not really understand Sokal’s article.
c) It shows that the editors of Social Text have little understanding of scientific principles.
d) It raises doubts about the quality of thought characteristic of postmodern literary theory.

Last minute GAMSAT 1 month study plan days 21-30

Days 1-10
Days 11-20
Days 21-30

  • Day 21: Read up on multiple choice question formats and how these are used. In the GAMSAT, there is only one correct answer for each question, and incorrect questions are not penalised. While few know the inner workings of ACER, test questions have been notes on some papers - the questions that you get may not be the same questions that your fellow students get, and it's unlikely that these marks are used to calculate your score, but rather server to gather other information and 'test' the question for inclusion in next year's GAMSAT. In addition, harder questions may also be weighted more highly.

    When answering multiple-choice questions, feel free to mark on the sheet any answers that you do not feel are correct. This can make it easier if you need to come back to the question. Other strategies can include choosing the middle answer from a range of numbers, an answer whose negative is also listed, options that are not absolute or that contain qualifiers, or the answer that looks best to you. See the NSW Board of Studies for online multiple-choice questions from various HSC subjects.

    Interestingly, a study has recently shown that you are more than three times as likely to correct a wrong answer for a right one as a right answer for a wrong one.
  • Day 22: Look up IUPAC naming. Create a model of a molecule from a name only:
    3-ethyl-4-methylhexane
    2-bromo-2-chloro-1,1,1,-trifluoroethane
    4-oxobutanoic acid
    2-methylbutane
    Or try the molecule in the linked article: 18-bromo-12-butyl-11-chloro-4,8-diethyl-5-hydroxy-15-methoxytricos-6,13-dien-19-yne-3,9-dione

    Then apply a reaction as per Day 5. What two molecules would come together through Fisher esterification to create your random molecule? What mechanism would you use to add a methyl group to the fourth carbon? What's your molecule's new name?
  • Day 23: Take a full length practice test.
  • Day 24: Recap on test.
  • Day 25: Look over any weak points on the test. More specifically, reassure yourself about any weak points you feel you have - remind yourself how small a contribution each small subject makes to the overall GAMSAT. Diss those who spent all their time studying optics, and reassure yourself that poetry majors will not get paid well anyway.
  • Day 26: Understand the principle of conservation: everything on both sides of an equation or equilibrium must balance, including atoms, electrons, and energy. This can be used as with Hess's law to calculate the change in energy from a reaction. If a reaction produces energy, then like a ball rolling downhill it will tend to go ahead; the Gibbs free energy change can be calculated to see in which direction an equibrium will move.
  • Day 27: Read Ambrose Bierce's Devils's Dictionary. Explain to your cat or significant other why, exactly, each entry is funny. Consider the following extract; then because you can, model the socially important opioids. Then, consider the ethical implications of providing such drugs to drug-seeking patients. Would you give a placebo to such patients, if requested by their specialist doctor as in this case?.
  • OPIATE, n. An unlocked door in the prison of Identity. It leads into the jail yard.
  • Day 28: Ohm's law: v=ir. One of two very simple physics equations that you should have memorised. V is the potential difference in volts; I is the current in amperes or amps and R is the resistance in ohms.
  • Day 29: How will you deal with graphs and diagrams, and long slabs of text to ensure they don't waste your valuable test time? Simple. Skim first, then read the questions, then check back into the text to find your answers. You don't have to comprehend completely on first reading, if you are skilled at picking up the meaning of each sentence quickly. Look into speed reading and skimming to improve your comprehension and speed. Don't try for large improvements, but skimming up to 1000 words/minute is achievable. More than this and you may be being sold a dodgy product.

Last minute GAMSAT 1 month study plan day 1-10

Stuck for time? Needing to get some GAMSAT study in stat before the exam looms? Here are 30 days of small actions to help you max out your marks.


Days 1-10
Days 11-20
Days 21-30
  • Day 1: Check that you are registered for the GAMSAT. Line up or order any necessary study materials such as textbooks, organic chemistry model kits, practice questions. Check forums for old copies of prep materials for sale, check out your university's second-hand bookshop, look at free online resources. Create a study area and set aside a quiet study time for each day. Print out five copies of your admissions ticket and tuck them into your wallet, handbag and jeans pockets so you will not forget it on the day.
  • Day 2: Take one of the half-length ACER practice tests. Ensure you take it in a quiet place and to the correct time (don't forget, only give yourself half as long!). Do not use any materials. Get a feel for the length and size of the test, any mental fatigue, how you pace yourself. Take note of which questions you got stuck on the length (still stuck halfway through reading question) and which questions you got stuck on the content (read, but did not understand, and could not work out an answer). The first you'll be improving by using your scanning and speed-reading skills to pull out relevant sections. The second indicate areas you will need to study.
  • Day 3: Mark your practice test. Panic, and then remember that it's very hard to align raw test scores to final GAMSAT scores after test questions had been removed, scores adjusted and scaled, etc; especially going on only half a test. Sign up to a GAMSAT forum to compare scores with others taking the test. For your essay, request feedback from suitably-qualified friends or colleagues, bribe college teachers for feedback with food, post essays on forums, or pay for an essay marking service.
  • Day 4: Sign up for a word of the day email. Change daily reading habits to include high-brow newspapers and magazine, especially opinions - check comments section of abc.net.au news and opinions, The Australian. Set up email or RSS feeds to have this material delivered directly to you so you cannot ignore it. Visit your local library to check out books on being a doctor, biological ethics, and literature for Section I practice, or search the Web and Project Gutenberg.
  • Day 5: Pull out the model kit – or make some playdough and toothpicks – or a whiteboard and marker. It's organic chemistry time! Pick a molecule such as caffeine. Draw it. Create the model. What are it’s functional groups? Does it contain rings, double bonds, triple bonds? Now recreate it backwards, and then in mirror image. Is it chiral? Check your organic chemistry textbook and find a reaction that could occur to your molecule. Look at the sample in your textbook, then at your model. Which carbon chain in your model is R? Which is R’? What happens to the molecule during the reaction? Recreate your model after the reaction. What if R and R’ were connected as a ring? Repeat with different molecules and reactions.
  • Day 6: Read up on the essays for Section II. Know about the two essay formats; the argumentative and the reflective. The essay is a lot less easy to define than study of science materials but it's also easier to pick up good marks with some simple changes.
  • Day 7: Look into speed reading and skimming. Practice on some of your texts for section III. Can you skim a complex text or diagram, and then when checking the question know where to turn back to? This will speed up your answers to questions. Skimming is mostly a matter of slowly building up the spaces between where your eyes rest on the page - creating greater saccades - and letting your peripheral vision pick up the rest.
  • Day 8: Make up some genetic traits like left- or right-eyed flounder fish or green- or purple-eyed aliens. Which one is recessive? Which is dominant? Make up a Punnett square to show what happens if two creatures with different genotypes breed. What's the probability you'll get a green-eyed alien? What's the possibility, if it bred with itself, that it's offspring would also be green-eyed? Would it be pure-bred (also known as homozygous, ie you'd never get purple-eyed offspring)? What if your alien did not have only two of every gene, but three? What would the offspring ratios look like then? Mendel's original experiments on peas are interesting and great simple examples - although modern statistics say he might have fudged his numbers! Finally, can you work out the percentages for each offspring type in an overall population using only the allele percentages? (Hint: Hardy-Weinberg)
  • Day 9: Read a book on philosophy, logic, or science ethics. What makes a strong argument? Think back on some points argued in the book that you read. Were these strong arguments? Look into a list of logical fallacies. Have you used some of these in your arguments?
  • Day 10: Look at the comments on a news website on a recent, controversial issue - perhaps something medically related such as euthanasia or abortion. Can you spot the logical fallacies in their arguments? How does the quality of arguments vary between 'tabloid' websites such as news.com.au and other websites such as abc.net.au? Write a short practice argumentative essay on the topic, checking your logic and your facts.

Free GAMSAT resources online - and how to use them

UPDATE 2015: Check out my new post 'More free GAMSAT study resources' which updates and expands on this list!


When studying for the GAMSAT you may be tempted by the expensive courses on offer. As I studied entirely on my own, I'm not really qualified to offer an opinion on these courses.

Consider these free alternatives:

Some companies which promote GAMSAT material will allow you to access limited amounts of that material for free.
Medprep International offers free practice questions and a short sample course.

Des O'Neill offers a free mailout with practice questions and an essay topic that I found useful in addition to the ACER practice questions.

Gradmed, based in the UK, have an hour and a half's worth of questions on their website as well.

Forums such as Paging Dr or gamsatforum.com have heaps on information on all subjects GAMSAT related and are often up to date - an excellent place to meet up with others studying for the GAMSAT at the same time.

Some attempts at collating GAMSAT material online have been attempted, such as on Wikibooks and a comprehensive MCAT textbook at MCAT Pearls (warning, Google lists this site as a malware distributor. So access it from a uni computer.).

Ask around at school for someone who's sat the GAMSAT previously - they may have suggestions or GAMSAT material they're happy to pass on.

Practice test booklets are also available at low cost from ACER - much cheaper than a full course.

Potentially less useful alternatives include the spammier course providers, mostly operating online.

From their free newsletter service I find Tomasz Forfa's service of PassGamsat.com to be unhelpful. As you can tell from their website, the emails reek of slick copywriting but seem short on content. You may find the emails helpful as a motivational tool or reminder and he does offer a free ebook. See his Ehow article for an example of the same slick copywriting.

Gamsat Guru also appear to have an email list. I'm testing it out at the moment.

I'd suggest that you use a list of GAMSAT topics to narrow down your study, then use the free material eg at MCAT Pearls to study. Test yourself with the free material first to make sure you're on the right track, but also do some practice tests with the ACER material as this comes closest to replicating the style of the GAMSAT test.

I'd advise against using non-GAMSAT style questions. They're helpful for testing your knowledge, but a huge part of doing well on the GAMSAT is not your knowledge but rather being able to pick a best selection from a multiple choice question. Stick to GAMSAT style questions and you'll get some valuable practice at this skill.

Practice question - Fish osmosis

Prompt
The following table contains details of the relative solutes in a variety of fish and their environments. Both sharks and bony fish live in the sea.


SaltUreaOsmotic concentration
Sea water1000 1000
Fresh water20 20
Sharks6504001050
Bony fish190 190
Freshwater fish130 130


Questions
Which of the fish types would need to drink water in their normal environment?
A. Freshwater fish
B. Bony fish
C. Sharks
D. None of the above

In which fish is there likely to be a net solute flow into the fish?
A. Freshwater fish and bony fish
B. Bony fish only
C. Sharks only
D. Both freshwater fish and sharks

Practice question - Metabolic rates

Prompt
The below diagram shows changes in metabolic rates dependant on body and environment temperature for two mammals, the kangaroo rat and the harbour seal.

(diagram)

Questions

When outside temperature drops below body temperature, the kangaroo rat's metabolism increases
A. at different rates but at the same body temperatures
B. at the same rate at the same body temperatures
C. at different rates at different body temperatures
D. at the same rate at different body temperatures

When outside temperature drops below body temperature, the harbour seal's metabolism increases
A. at different rates but at the same body temperatures
B. at the same rate at the same body temperatures
C. at different rates at different body temperatures
D. at the same rate at different body temperatures

Answers

Kangaroo rat - D, harbour seal - A

Practice question - Fish circulation

Prompt
The circulatory system of the fish is diagrammed below. Of the output from the heart, 40% is directed to the brain and 15% to each of the gills, kidneys, front and rear intestines.

(diagram - not guaranteed to be an actual fish circulatory system)

Question
What percentage of the blood from any one pump of the heart will pass through the liver?
A. 0%
B. 15%
C. 30%
D. 40%

Practice Question - Acceleration



Prompt:
Ann, a physics student, decides to measure the acceleration in her car. She decides to hang a bob (pendulum) from the rear view mirror in her car. It can swing towards the front of the car, which she measures as theta, or towards the rear of the car, which she measures as negative theta.

(diagram)

Questions

What angle will the bob make when Ann, after moving forward at a constant speed, brakes?
A. Positive theta
B. Zero
C. Negative theta
D. There is not enough information provided to answer this question

Ann graphs the angle of the pendulum over a period of time.
(second graph)

At period 4, the car's speed was
A. Increasing
B. Constant
C. Decreasing
D. There is not enough information provided to answer this question

Over the whole time period, the car was stationary:
A. During period 1 only
B. During period 3 only
C. During period 6 only
D. There is not enough information provided to answer this question

Practice Question - Defibrillation



Prompt:
Defibrillation is a treatment for cardiac arrhythmias, ventricular fibrillation and ventricular tachycardia that delivers an electrical shock to the heart. The electrical shock allows the sinoatrial node to reestablish the baseline heart rythym.

An 80kg man is shocked with a defibrillator which delivers 6000 volts with a current of 100 amps.

Questions

What is the resistance across the body?
A.
B.
C.
D.

What amount of energy was delivered by the electrical shock?
A.
B.
C.
D.

Answers

Note that this question requires you to have memorised the physics formula v=ir. You may also find reading up on defibrillation at the Wikipedia page to be useful

Practice question - Gettysburg Address



Prompt The Battle of Gettysburg was a pivotal moment in the US Civil War. Following the battle, a famed orator, Everett, and Lincoln, then President of the United States, were invited to a ceremony to dedicate a war cemetery.

Everett's speech was the day's principal "Gettysburg address." His oration began:

"Standing beneath this serene sky, overlooking these broad fields now reposing from the labors of the waning year, the mighty Alleghenies dimly towering before us, the graves of our brethren beneath our feet, it is with hesitation that I raise my poor voice to break the eloquent silence of God and Nature. But the duty to which you have called me must be performed; — grant me, I pray you, your indulgence and your sympathy."

And ended three hours later with:

"But they, I am sure, will join us in saying, as we bid farewell to the dust of these martyr-heroes, that wheresoever throughout the civilized world the accounts of this great warfare are read, and down to the latest period of recorded time, in the glorious annals of our common country, there will be no brighter page than that which relates the Battles of Gettysburg."

The speech was well received, but overshadowed by Lincoln's reply:

"Four score and seven years ago our fathers brought forth on this continent, a new nation, conceived in Liberty, and dedicated to the proposition that all men are created equal.

Now we are engaged in a great civil war, testing whether that nation, or any nation so conceived and so dedicated, can long endure. We are met on a great battle-field of that war. We have come to dedicate a portion of that field, as a final resting place for those who here gave their lives that that nation might live. It is altogether fitting and proper that we should do this.

But, in a larger sense, we can not dedicate -- we can not consecrate -- we can not hallow -- this ground. The brave men, living and dead, who struggled here, have consecrated it, far above our poor power to add or detract. The world will little note, nor long remember what we say here, but it can never forget what they did here. It is for us the living, rather, to be dedicated here to the unfinished work which they who fought here have thus far so nobly advanced. It is rather for us to be here dedicated to the great task remaining before us -- that from these honored dead we take increased devotion to that cause for which they gave the last full measure of devotion -- that we here highly resolve that these dead shall not have died in vain -- that this nation, under God, shall have a new birth of freedom -- and that government of the people, by the people, for the people, shall not perish from the earth."

Questions

Lincoln's address differs from Elliot's in the
A. Religious overtones
B. Sentence length and structure
C. Poetic imagery
D. Appeals to patriotism

In his speech, Lincoln appears
A. Confident
B. Shy
C. Self concious
D. Self assured

Which phrase from the speeches is most realistic?
A. "overlooking these broad fields"
B. "dust of these martyr-heroes"
C. "there will be no brighter page than that ..."
D. "graves of our brethren beneath our feet"

Question - Science vs Religion cartoon


The prompt for this question was a cartoon of two men sitting on mountaintops. One, a bearded man in a robe with a book, sits next to a sign in gothic type with the word 'Truth'. The other man is in a lab coat and glasses, holds a beaker, and sits next to a sign with the word 'Rebuttal'.

Questions:


This comic shows
A. Science considers religion to be false
B. Truth can only be reached through religion
C. Science and religion can learn a lot from each other
D. Science has no truth of it's own to offer

The scientist in this comic
A. Believes that there are many different types of truth
B. Understands that religion is an ally in the search for truth
C. Considers truth as something unreachable
D. Holds science to be superior to religion

Question - Falsifiability


This question provided a text on a theory of science - that all scientific theories are scientific theories because they are falsifiable. I do not recall enough about the prompt on this question to locate or recreate it, so I will instead direct you to an article by Karl Popper, a philosopher of science, entitled "Science as Falsification" and originally published in 1963. Please keep in mind that this piece is significantly longer than a standard GAMSAT prompt.

Questions:

A scientific theory must be:
A. Broad and sweeping
B. Unspecific and topical
C. Creative and innovative
D. Specific and testable

Considering the following three theories:
I. The earth is flat
II. The sun orbits the earth
III. The earth orbits the sun

Which of these is a scientific theory?
A. I only
B. I and III only
C. II and III only
D. All of I, II and III

Question - Energy flows in Inuit society



Diagram:
This was a complicated flowchart diagram of quantified energy flows, with different members of society (men, women and children), different types of work (campwork, travelling, hunting, mining and carving, wage work), different commodities and energy products (selling skins to purchase gasoline, feeding excess fat from hunting to dogs). I believe this flowchart can be found in the book The Flow of Energy in a Hunting Society by William B Kemp, as published by Scientific American. I will attempt the creation of a modified diagram as a study aid.

Questions:

Which of the following is true?
A. Housing is a net provider of energy
B. Snowmobiles use less energy than they provide
C. Children have no effect on the Inuit energy system
D. Dogs use more energy than they provide

Which change would have the greatest effect on the Inuit lifestyle?
A. Price of gasoline increases by 2%
B. Dragnet hunting reduces the number of seals by 40%
C. The carving-stone mine closes down, reducing supplies of carving stone and mine work
D. Wages paid for wage work drop 10%

Of the following four Venn diagrams, which best describes the division of work in an Inuit camp?

(choose from four Venn diagrams for answer; they are not labelled so you need to choose which circle represents men, women, children)

Question - Fingernail growth rates


Question: Making some basic assumptions, how fast do your fingernails grow?

Answers:
A. 1*10^-3 m/s
B. 1*10^-6 m/s
C. 1*10^-9 m/s
D. 1*10^-12 m/s

How to work it out:

First, make those 'basic assumptions' mentioned earlier in the question. How fast do my fingernails grow? I assumed 5cm/year. As it turns out, I wasn't too far off, as Wikipedia suggests 3.5 cm. I then made sure I had this result in the correct units - first adjusting cm to m, and then years to seconds. You make need to make sure that you are confident with scientific notation. This estimate brought me fairly close to the result of 1*10^-9m/s - option C.