Chemistry Reference
In-Depth Information
- Emphasizing the effects that can be observed
- Making it possible to read the measuring devices
- Finishing the experiment clearly
- Looking for safety
Observation
(measured values):
- Gathering and formulating the observations
- Writing down observations (black board, chronological order)
- Repeating parts of the experiment if necessary
- Presenting the measured values tabularly or graphically
- Discussing measurement errors and sources of errors
Explanation:
- Interpreting the particular observations by students
- Repeating experimental parts if necessary
- Offering help for explanation and discussion
- Referring observations to previous knowledge
- Discussing and explaining the overall observations
- Developing models of the structure of involved substances
- Draw beaker models containing symbols of atoms, ions, molecules
- Finding formulae and reaction equations
- Formulating the experimental report on the black board
- Taking the report in the exercise topic by every student
- Write-up the experimental report as homework, if required
Follow-up
(next lesson):
- Answering questions to the experiment or experimental report
- Completing the experimental report
- Getting back to the presentation of the problem
- Completing the problem and its solution
- Deducing a new topic from the results if applicable
5.3 Learner: Play Instinct, Curiosity, Experimental Skills
A special relevance belongs to the experiment in chemistry classes for young
students: due to play instinct and curiosity, high receptiveness for experiments
can be expected. Easy phenomena and measurements of density, solubility, melt-
ing, and boiling temperatures of substances are most welcome among young
students and recommended for student experiments. Often very interested students
already have a chemistry set (see Chap. 4) and know a lot of simple experiments:
these students especially stand out, because of their knowledge and experimental
skills. The following aspects have to be reflected for the learner.
