RT Journal Article SR Electronic A1 MARKOVÁ, Iveta T1 REALIZATION OF DEMONSTRATION EXPERIMENT IN TEACHING THE SUBJECT DANGEROUS SUBSTANCES JF Trends in education YR 2012 VO 5 IS 1 SP 192 OP 195 UL https://tvv-journal.upol.cz/en/artkey/tvv-201201-0044.php AB Demonstration experiment is an appropriate didactic tool in teaching technical subjects. It creates a possibility to present and explain various processes within the study of science subjects in technical branches. This paper deals with presenting a demonstration experiment in the subject Dangerous Substances within the branch 8.3 Security service. It points out the necessity to count on the possible accidents as a consequence of dangerous substances leakage.