Unit One: Chemical Reactions. Lesson two: the speed of chemical reactions.Keywords (English): concentration – reaction rate – reactants – collision frequency

Unit One: Chemical Reactions. Lesson two: the speed of chemical reactions.Keywords (English): surface area – reaction rate – reactants – collisions

Objective To observe the effect of temperature on the rate of a chemical reactionTools Two glasses with equal amounts of water, one hot and one cold Two effervescent tabletsSteps Place one tablet in the hot water and the other in the cold water Compare the rate of fizzing in both glassesObservation......

Unit One: Chemical Reactions. Lesson two: the speed of chemical reactions.Keywords (English): enzymes – reaction rate – catalysts – biochemistry

Keywords: Periodic table – Elements – Groups – Periods – Classification

Keywords: Light – Plants – Photosynthesis – Growth – Energy

Keywords: Water transport – Plant – Roots – Vessels – Transpiration

The goal of the experiment:Explain the difference between materials in terms of densityTools:Copper wire - piece of gold - platinum ingot - ice cubes - piece of coal - cork - paper - piece of wood - ruler - screwSteps:Put the materials in front of you in the tub and control the liquid density from t......

Keywords: Photosynthesis – Light intensity – Plants – Oxygen – Chlorophyll