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 1: Measure the volume of liquid, powdered and solid substances with a graduated cylinder made of a PET bottle.

Cut the neck of a transparent PET bottle. Gradually fill it with the water of a known volume (e.g. 100 ml) and record the height of the level (Fig. 4).

**Pic 7: **a PET graduated cylinder

## Measure the volume:

- 500g of water
- 500 g of sand
- 500 g iron weight
- wooden prism weighing 500 g