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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 3: Carbon dioxide
Level: Primary (1.–5. Graders)
Thematic Unit:
Subject: science
Recommended age of pupils: 9–11 years old or older
Time allocated: preparation: 15 minutes, implementation: 15 minutes
The teacher prepares the apparatus for a lab preparation of carbon dioxide (Fig. 2). By reaction of Sodium bicarbonate - baking soda and Acetic acid - vinegar (Reactive scheme 2) or calcium carbonate and hydrochloric acid (Reactive scheme 1), he prepares carbon dioxide, which he pours in the pneumatic bath through rubber pipe. There are four lit candles of different heights, ordered gradually. Pupils watch the order of candles going out. They write their presumptions and observation in the worksheet.
After that, the teacher sinks the rubber piping from the apparatus in the limewater and leaves the gas to bubble for a while. Testing for carbon dioxide according to Reactive scheme 3 is taking place. The teacher fills up the wash bottles with lime water so that every working group has one. He attaches a rubber pipe to the side of a wash bottle and pupils carefully blow into it, using the full breath. Instead of a wash bottle, a beaker with a straw or a rubber pipe can be used. However, when using these, a teacher must supervise. Pupils write their observation and conclusions in the prepared worksheet.