Keywords: Nonmetals – Oxygen – Combustion – Nonmetal oxides

The goal of the experiment: experiment to learn the concept of speed and how we can measure it Experience Tools:  different speed cars – stopwatch- measuring tape Steps of the experiment: The conclusion: Keywords (English): speed – motion – distance – time – speed measurement

purpose of experimentMixing the seven spectrum colors to produce the white lightExperiment tools The seven-color disc is fixed on an electrical device. - SwitchstepsPress the power button of the device to mix the seven colors,then observe what happenPress the stop button of the devicePress t......

Keywords: Rutherford model – Atomic nucleus – Alpha particles – Gold foil

Endothermic reactionsKeywords (English): endothermic reactions – energy absorption – thermal change

realization of light refraction

Keywords: Lungs – Respiration – Diaphragm – Air – Respiratory system

Keywords: Chromatography – Separation – Colors – Adsorption – Analysis

Objective:To prove that living organisms carry out respiration, and that this process releases energy in the form of heat.Materials:Thermometer - cotton wool - two flasks - insulating material - some dead pea seeds - some living pea seedsSteps:Soak the living pea seeds for one hour.Place the germina......