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EN
In this paper, results of melting experiment of tektites are presented. Tektites from four strewnfields: North American, Central European, Ivory Coast and Australasian were used. The fragments of investigated tektites were heated in oxide atmosphere in 1100oC in two time intervals: 5 and 120 minutes. The temperature of 1100oC is too low for completely melting of the studied material despite to heating in the same conditions but in small area (eg. in a spot).
EN
The objective of this study was to investigate the effect of an aquatic intervention on the gross motor function and aquatic skills of children with cerebral palsy (CP). Twenty-nine children with CP, aged 5 to 14, were recruited. Fourteen children completed an aquatic intervention (EG), and 13 children served as controls (CG). Two participants dropped out due to events (illness) unrelated to the intervention. The aquatic intervention lasted 6 weeks (2 sessions per week at 55 minutes per session) with a follow-up period of 3 weeks. The outcome measures were the Gross Motor Function Measure (GMFM) for motor function and the Water Orientation Test Alyn 2 (WOTA 2) for aquatic skills assessment. A significant improvement was observed in the secondary assessment of GMFM and WOTA 2. In contrast to the aquatic skills improvement, the GMFM change was not maintained at follow-up. Our results indicate that children with CP can improve gross motor function on dry land and aquatic skills with a 6-week water intervention. The intervention period was too short for sustainable improvement in dry-land motor skills after intervention (followup), but time was sufficient to achieve sustainable improvements in aquatic skills.
EN
Seven simple demonstration experiments are described in this article, which can be used by teachers of chemistry for a wide variety of audiences. In addition to detailed instructions for each experiment, important background information is given, thus enabling the demonstrations to become part of a profound learning experience, which is the primary aim of the chemical theatre.
PL
W niniejszym artykule autor opisuje siedem prostych doświadczeń chemicznych, które mogą być wykorzytywane przez nauczycieli chemii w różnych okolicznościach i dla różnych grup słuchaczy. Oprócz instrukcji do wykonywania doświadczeń, autor podaje szereg dodatkowych informacji, które umożliwiają podnoszenie poziomu spektaklu ze zwykłej lekcji chemii do głębokiego przeżycia - taki jest bowiem główny cel teatru chemicznego.
EN
An historical background to the teaching of chemistry is presented, together with examples of great teachers from the past. Some aspects of the modern English school chemistry syllabus are discussed, both from the point of view of its theoretical content and its aim in helping children to develop practical skills. Chemistry Clubs, Open days and popular science lectures are also mentioned as a means of stimulating interest in chemistry as taught in schools.
PL
W artykule przedstawiono tło historyczne nauczania chemii; podano także przykłady wybitnych nauczycieli z przeszłości. Omówiono wybrane elementy programu nauczania chemii w szkołach angielskich z punktu widzenia zawartości teoretycznej, jak również przydatności w rozwijaniu przez uczniów umiejętności praktycznych. Jako dodatkowe sposoby wzbudzania zainteresowania chemią szkolną przedstawiono także działalność kółek chemicznych, organizowanie dni otwartych oraz wykładów popularnonaukowych
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