Keywords: Lunar eclipse – Earth’s shadow – Moon – Sun

Keywords: Transpiration – Plants – Water – Leaves – Evaporation

Keywords: Solar eclipse – Moon – Shadow – Sun – Alignment

Keywords: Friction – Motion – Surfaces – Force – Resistance

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

Keywords: Electrical energy – Conversion – Motion – Light – Heat

Keywords: Lever law – Force – Arm – Fulcrum

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

Keywords: Displacement – Metals – Hydrogen – Chemical reaction

Keywords: Bernoulli’s principle – Pressure – Velocity – Fluids – Flow

Keywords: pH – Litmus paper – Solutions – Acidic – Basic

Keywords: Reaction time – Sight – Hearing – Nervous system – Reflexes

Keywords: Light – Sight – Eye – Vision – Light perception

Keywords: Vernier caliper – Precise measurement – Lengths – Measuring tools

Keywords: Equation balancing – Chemical equilibrium – Reactants – Products – Atoms

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

Keywords: Prism – Light refraction – Dispersion – Light path

Keywords: Epithelial tissues – Simple – Compound – Cells – Covering

Keywords: Myopia – Hyperopia – Astigmatism – Lenses – Vision

Keywords: Uniform speed – Variable speed – Average – Instantaneous

the goal:The hydrogen atom discrete spectroscopyMaterials and tools:Hydrogen gas electrical discharge tube - triple glass prism - white screen - two vertical micro-slits opposite each other - metal rod - connecting wiresSteps:1-Connect the positive terminal of the voltage source to the base of the e......

Keywords: Polysaccharides – Starches – Iodine – Food

Keywords: Current – Electricity – Electrons – Circuit – Voltage

Keywords: Kelvin experiment – Static electricity – Voltage – Charges