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1 ALL MATTER IN THE UNIVERSE IS MADE OF VERY SMALL PARTICLES
- Theory
- TASKS
- 3.1 We observe and study substances
- 3.2 Water is not only for drinking
- 3.3 The air around us
- 3.4 Metals in our life
- 3.5 Light
- 3.6 Physical qualities (volume, force, time, weight)
- Task 1: Measure the volume of liquid, powdered and solid substances with a graduated cylinder made of a PET bottle
- Task 2: Measure the volume of the lungs by so-called spirometer made from a PET bottle
- Task 1: Make a scale from a ruler
- Task 1: Make a paper sundial
- Task 2: Make a paper sundial in the garden
- Task 1: Make a dynamometer for measuring the tension force
- Task 2: Make a dynamometer for measuring the press
- WORKSHEETS FOR PUPILS
- Workshops
- Task 1: Measure the volume of liquid, powdered and solid substances with a graduated cylinder made of a PET bottle
- Task 2: Measure the volume of the lungs by so-called spirometer made from a PET bottle
- Task 1: Make a scale from a ruler
- Task 1: Make a paper sundial
- Task 2: Make a paper sundial in the garden
- Task 1: Make a dynamometer for measuring the tension force
- Task 2: Make a dynamometer for measuring the press
Task 2: Make a dynamometer for measuring the press.
Fill the PET bottle with water to the brim, add a few cut-off match heads (with a shank length of approx. 1 mm) and close the bottle. The more bottle you press, the more matches will sink. This press force measurement device operates on the principle of changing the density of a match caused by water pushed into its stick. Primary school pupils do not know the term “density“, so we say: „We push a little water into the stick of the match, and thus we increase the weight of the match.“