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Top oder Flop

About points...

We associate a certain number of points with each exercise.
When you click an exercise into a collection, this number will be taken as points for the exercise, kind of "by default".
But once the exercise is on the collection, you can edit the number of points for the exercise in the collection independently, without any effect on "points by default" as represented by the number here.

That being said... How many "default points" should you associate with an exercise upon creation?
As with difficulty, there is no straight forward and generally accepted way.
But as a guideline, we tend to give as many points by default as there are mathematical steps to do in the exercise.
Again, very vague... But the number should kind of represent the "work" required.

About difficulty...

We associate a certain difficulty with each exercise.
When you click an exercise into a collection, this number will be taken as difficulty for the exercise, kind of "by default".
But once the exercise is on the collection, you can edit its difficulty in the collection independently, without any effect on the "difficulty by default" here.
Why we use chess pieces? Well... we like chess, we like playing around with \(\LaTeX\)-fonts, we wanted symbols that need less space than six stars in a table-column... But in your layouts, you are of course free to indicate the difficulty of the exercise the way you want.

That being said... How "difficult" is an exercise? It depends on many factors, like what was being taught etc.
In physics exercises, we try to follow this pattern:

Level 1 - One formula (one you would find in a reference book) is enough to solve the exercise. Example exercise

Level 2 - Two formulas are needed, it's possible to compute an "in-between" solution, i.e. no algebraic equation needed. Example exercise

Level 3 - "Chain-computations" like on level 2, but 3+ calculations. Still, no equations, i.e. you are not forced to solve it in an algebraic manner. Example exercise

Level 4 - Exercise needs to be solved by algebraic equations, not possible to calculate numerical "in-between" results. Example exercise

Level 5 -
Level 6 -

Exercise

https://texercises.com/exercise/top-oder-flop-262/

Question

Solution

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Exercise:
abcliste abc Wenn von einem radioaktiven Isotop aktuell .mol vorliegen hat und diese eine Halbwertszeit von min haben -- welche Anzahl Nuklide hatte man dann vor h vorliegen? abc Berechne die Zerfallskonstante eines Stoffes dessen Aktivität währ min von .kBq auf noch Zerfälle pro Minute abnimmt. abc Welche Aktivität haben .mol Isotope mit einer Halbwertszeit von min? abc In einem gefundenen Holzwerkzeug wird pro Gramm Kohlenstoff eine Aktivität von .Bq festgestellt. Wie weit liegt das Ableben dieses Holzes zurück? abc In einem Mineral findet man .mol isotopeU Isotope und numpre isotopePb Isotope. Wie alt ist dieses Mineral? abc In einem Gesteinsbrocken findet man microgram Blei; welche Menge Uran erwartet man bei einem Alter von .ea? abcliste

Solution:
abcliste abc N_ N_t texte^+lambda t numpr.e texte^per-modereciprocal.persecond s numpr.e abc lambda fract lnleftfracA_A_tright fract lnleftfracBq.Bqright per-modereciprocal.persecond abc A lambda N per-modereciprocal.persecond numpr.e .eBq abc t fracTln ln leftfracA_A_tright frac.esln ln leftfrac.Bq.Bqright .es abc t fracTln ln leftfracN_N_+right frac.esln ln leftfracnumprenumpr.e+right .es abc m_ m_ frac fractexte^+lambda t- kg frac fractexte^.s .es- &rightarrow infty abcliste

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Attributes & Decorations

Tags	altersbestimmung, physik, radioaktivität
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Difficulty	(1, default)
Points	12 (default)
Language	(Deutsch)
Type	Descriptive / Quality
Creator	uz
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