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

Keywords: Blood groups – A B O – Clotting – Antibodies

Keywords: Amylase enzyme – Temperature – Digestion – Starch – Enzyme activity

Keywords: pH – Enzyme activity – Reaction – Digestion

the goal:Revealing how photosynthesis and cellular respiration work together in an ecosystem.Materials and tools:Bromothymol blue (BTB) solution - Glass beaker - Test tubes - Aluminum foil - Aquatic plant.Steps:1- Add a quantity of bromothymol blue (BTB) solution to a glass beaker using a pipette.2-......

Keywords: Anaerobic respiration – Alcoholic fermentation – Carbon dioxide – Yeast – Sugar

Keywords: Exhalation – Carbon dioxide – Limewater – Respiration