Fat Digestion Investigationfat digestion – lipase – bile – emulsification – digestive system

Keywords: Ammonia – Hydrogen chloride – White vapor – Gas combination

Keywords: Chemical reaction – Reactants – Products – Change

Keywords: Acids – Bases – Indicators – pH – Color

Keywords: Reaction rate – Chemical reactions – Rate of reaction – Variables

This experiment aims to determine the density of solid objects by measuring their mass and volume. The mass is measured using a balance, while the volume is determined either from the object’s dimensions (if it has a regular shape) or by water displacement in a graduated cylinder (if irregular). The......

The goal of the experiment This experiment aims to practically determine the density of a liquid. Experiment Tools Scale - Included tester - different liquids with different volumes Steps of the experiment Choose a few different sized liquids from the lab library. Weigh the tester blank inserted and......

Science curriculum for the first grade of middle school The first unit: periodicity of the element Lesson two: List the properties of the elements in the periodic tableObjective: Determine the volume of a solid object using the known volume of a liquidMaterials: Graduated cylinder – Water – Various......

Objective:Learn how the Hofmann apparatus works and use it to electrolyze water into hydrogen and oxygen gases, while observing the amount of gas produced at each electrode.Materials:Hofmann apparatus – Electrical power source battery – Water – Dilute sulfuric acid H₂SO₄ – Dropper – Connecting wires......

Unit one: chemical reactions. Lesson one: chemical reactions.Keywords (English): mercury oxide – thermal decomposition – mercury – oxygen

Unit one: chemical reactions. Lesson one: chemical reactions.Keywords (English): copper hydroxide – thermal decomposition – heating – oxides

Unit one: chemical reactions. Lesson one: chemical reactions.Keywords (English): copper carbonate – heating – decomposition – carbon dioxide

Unit one: chemical reactions.  Lesson one: chemical reactions.Objective: To study the thermal decomposition of copper sulfate.Materials: Copper sulfate _ Spoon _ Bunsen burner _ Test tubeSteps: Heat a small amount of blue copper sulfate in a test tube using a Bunsen burner.Observation: A black......

Unit one: chemical reactions.  Lesson one: chemical reactions.Keywords (English): thermal decomposition – sodium nitrate – heat – oxides – thermal reaction

Unit one: chemical reactions. Lesson one: chemical reactions.Keywords (English): silver nitrate – sodium chloride – white precipitate – precipitation reaction

The process of oxidation and reduction according to the traditional conceptKeywords (English): oxidation – reduction – electron loss – electron gain – redox reactions

Unit One: Chemical Reactions. Lesson two: the speed of chemical reactions.Keywords (English): reaction rate – time – reactants – products – chemistry

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

Objective: To deduce that cathode rays are negatively charged particles as proven by ThomsonMaterials: Cathode ray tube _ electric power source _ magnetSteps: Connect the cathode ray tube to a power source Observe a straight luminous beam inside the tube Bring the magnet closer and observe what happ......

An experiment demonstrating the difference between electrolytic and non-electrolytic solutions by testing their ability to conduct electric current using a simple electrical circuit and observing the brightness of a lamp.Keywords: Electrolytic Solutions - Non-Electrolytic Solutions - Electrical Cond......

Purpose of experimentPreparation of carbon dioxide gas in the laboratorytoolsgraduated flask - glass beaker - cork stopper with two holes - glass funnelU-shaped glass tube - dilute hydrochloric acid - calcium carbonatesteps Place the candle in the middle of the lab bench.Light the candle by usi......

purpose of experiment illustrate chemical indicators tools Hydrochloric acid – sodium hydroxide – orange methyl indicator – litmus indicator – bromothymol blue indicator – 12 conical flask – distilled water-Phenolphthalein indicator StepsPut 10 ml of the solution in front of you into each conical......

Objective of the experiment:Calculate the volume percentage of oxygen in the airExperiment tools:Glass basin - Graduated cylinder - Candle - Beaker with colored water - Lighter Experiment steps: - Place the candle inside the glass basin .- Pour the colored water into the glass basin .- Light the can......

Detection of the chloride anionThis video shows how to do the experimenthttps://youtu.be/_2a2CeQxanw

Objective of the experiment:fat detectionExperiment tools:Vegetable oil - Skimmed milk - Whole milk - Sudan III solution - Test tubesExperiment steps: - Put 2 ml of milk into test tubes.- Add 5 ml of water into a test tube and then put 2 ml of oil.- Add 10 drops of Sudan III solution to th......

Objective:Identify the effect of the reaction of reactive metals with hydrogenMaterials:Glass beaker – Water – Lithium – Sodium – Potassium – Tongs – Thermometer – Phenolphthalein solutionProcedure:Fill three beakers with equal amounts of water Add a few drops of phenolphthalein solution to each bea......

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

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

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

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

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: Nitrite anion – Griess reaction – Pink color – Chemical analysis

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

Keywords: pH – Enzyme activity – Reaction – Digestion

This experiment aims to detect the ferric ion (Fe³⁺) in an iron chloride solution. When bases such as ammonium hydroxide or sodium hydroxide are added to the iron chloride solution, a reddish-brown precipitate of ferric hydroxide is formed. When hydrochloric acid is added, this precipitate dissolves......

Keywords: Sulfide anion – Rotten egg smell – Hydrogen sulfide

Keywords: Thiosulfate – Chemical analysis – Reaction – Solutions

Keywords: Chemical properties – Metals – Oxidation – Oxides - Magnesium

The color of gold changes according to the size of the gold nanoparticles:Tools Samples of nanoparticles of gold (visible sample)A sample of gold minutes is small, its minutes are measured in macrosteps Bring the gold sample measured by the macro and display the flashlight on it and note what h......

Keywords: Flow – Fluids – Volume – Time – Flux

Keywords: Bicarbonate – Carbon dioxide – Acids – Bubbles

Keywords: Nitrate anion – Dark brown reaction – Chemical analysis

Keywords: Ferrous ion – Green color – Chemical tests

aluminum is present, a white precipitate forms, which dissolves in excess base. This method relies on the formation of aluminum hydroxide, which distinguishes Al³⁺ ions from other cations.Aluminium – Gelatinous precipitate – Chemical analysis

Keywords: Sulfite – Sulfur dioxide – Oxidation – Tests

Detection of the phosphate anionKeywords (English): phosphate ion – yellow precipitate – chemical analysis – reagents

Detection of monosaccharides and disaccharides

The particles of matter have interstitial spaces between themKeywords (English): matter particles – intermolecular spaces – physical states – particle motion

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

Water filter designKeywords (English): water filter model – purification – filtration – gravel – charcoal

Keywords: Chemical change – Reaction – Reactants – Products – Evidence

the goal:Explain how distilled water is obtained.Materials and tools:2 flasks - condenser - connecting tubes - salt water solution - flame - stoppersSteps:Place the condenser horizontally on the standPlace the flasks, one over a Bunsen flame and the other on a lab benchPour the salty water into the......

Keywords: Bunsen burner – Flame – Heating – Safety – Laboratory

the goal:To explain how to make soap at home.Materials and tools:Water sample 1 - Water sample 2 - Distilled water - Dropper - 3 test tubes with stoppers - Coloring pencil - Dishwashing liquid - Test tube rack.Steps:1- Take a quantity of distilled water and place it in test tube D, repeat the step w......

Keywords: Boyle’s law – Pressure – Volume – Gases – Inverse relationship

the goal:Determine the value of atmospheric pressure using a mercury barometer.Materials and tools:tube 90 cm - basin - mercury - glass plate - holderSteps:1) Fill the test tube and the glass bowl with mercury.2) Drop the test tube in the pelvis and note what happens. Note:The drop in the level......

the goal:Explanation of how we can infer a chemical change has occurred.Materials and tools:Ammonia solution - Distilled water - Glass beaker - Universal indicator - Effervescent tablets.Steps:1- Put a quantity of distilled water in the glass.2- Add drops of ammonia solution into the water in the gl......

the goal:Measuring the change in temperature of a mass of water during a combustion reaction.Materials and tools:Candle - Small metal box - Large open-ended metal box - Steel wool - Balance - Pen - Stirring rod - ThermometerSteps:1. Light the candle and weigh the large container.2. Fill the containe......

the goal:Learning how to prepare ester.Materials and tools: Electric heater - Glass cup - Test tube - Salicylic acid - Methanol - Sulfuric acid - Cotton - SpoonSteps:1. Fill the glass with water and heat it on the electric heater to the mid-level temperature.2. Weigh 1.5 grams of salicylic acid......

Determine the molar ratiomole ratio – moles – stoichiometry – chemical reaction

Chewing gum analysisKeywords (English): chewing gum – composition – analysis – sugars

Formation of SaltKeywords (English): salt formation – ionic reaction – crystallization

Keywords: Compounds – Elements – Bonds – Chemical reaction – Formulas

Keywords: Hydrated salts – Water molecules – Heating – Chemical formula

Investigation of the process of electrolysis of waterelectrolysis of water – oxygen – hydrogen – electric current

Keywords: Pure water – Neutral – pH 7 – Indicators – Acids and bases

Keywords: Thermal expansion – Heat – Length increase – Liquids – Gases

Keywords: Thermal contraction – Cooling – Materials – Practical applications

Keywords: Displacement reaction – Iron – Copper sulfate – Copper precipitation – Chemical change

Keywords: Thermal expansion – Heat – Length increase – Liquids – Gases

Keywords: Homogeneous mixtures – Heterogeneous mixtures – Solutions – Suspensions – Colloids

Investigation of factors affecting solubilitysolubility – temperature effect – stirring – surface area – type of solute – dissolving rate

the goal:Draw a conclusion about the Law of Conservation of Mass.Materials and tools:Wire crucible - Test tube - Balloon - Sensitive scale - Heater - Hot water bath - Test tube holder - Stopwatch - TissuesSteps:1. Place a piece of wire crucible in a medium-sized test tube.2. Attach the balloon nozzl......

Three states of matterThis experiment shows how water changes between its three states due to temperature. Ice melts when heated to become liquid water, then turns into vapor with continued heating. When the vapor touches a cold surface, it condenses back into water droplets.states of matter – solid......

Keywords: Mixing substances – Separating a mixture of liquids (water and oil) – Separating a mixture of solid and liquid – Separating a mixture of solids

Metals and non-metalsmetals – nonmetals – conductivity – luster – hardness – matter

How can the reaction rate be increased?reaction rate – catalysts – temperature – concentration – surface area

Keywords: Pepsin enzyme – Protein digestion – Stomach – Gastric juice – Digestive enzymes

Keywords: Semi-permeable membrane – Diffusion – Osmosis – Molecules – Membrane transport

Keywords: Millikan experiment – Oil drop – Electron charge – Electric field – Atomic physics

Keywords: Equilibrium – Equal forces – Rest – Uniform motion

Keywords: Specific heat – Thermal energy – Mass – Temperature

Keywords: Cold materials – Heat transfer – Absorption – Temperature

This experiment demonstrates the effect of concentration and temperature on the equilibrium between the pink and blue cobalt chloride complexes.Keywords: Equilibrium – Forces – Motion – Position – Physics

Keywords: Conservation of mass – Chemical reaction – Change – Reactants – Products

Keywords: Atomic mass – Protons – Neutrons – Atom – Mass number

Keywords: Pigment separation – Chromatography – Colors – Paper – Analysis

Keywords: Alcohols – Functional groups – Combustion – Solubility – Bonds

Keywords: Nitrogen gas – Preparation – Reaction – Products – Laboratory

Keywords: Nitrogen – Salts – Chemical reaction – Analysis

Keywords: Nitrogen gas – Preparation – Reaction – Products – Laboratory

Keywords: Ammonia gas – Ammonia – Preparation apparatus – Odors – Bases

Keywords: Mass spectrometer – Ions – Mass – Charge – Separation

Volume Expansion of Solids

Keywords: Hydrometer – Liquid density – Buoyancy – Measurement

Keywords: Chromatography – Separation – Colors – Adsorption – Analysis

Keywords: Metals – Acids – Hydrogen – Chemical reaction

Keywords: Exhalation – Carbon dioxide – Limewater – Respiration

Keywords: Vitamin C – Ascorbic acid – Detection – Iodine solutions

Keywords: Mixtures – Separation – Filtration – Liquid – Solid

Keywords: Red cabbage – Color indicator – pH – Acids – Bases

Keywords: Archimedes’ principle – Buoyancy – Upthrust – Fluids – Volume

Keywords: Charles’ law – Gas – Volume – Temperature – Expansion

Keywords: Type of substance – Heat – Heat capacity – Heating

Keywords: States of matter – Shape – Flow – Solid – Liquid – Gas

Keywords: Viscosity – Liquids – Motion – Falling – Resistance

Keywords: Convection – Heat – Fluids – Air – Transfer

Keywords: Heat – Expansion – Contraction – Physical change – Materials

Keywords: Chemical reaction – Reactants – Products – Change

Keywords: Mass – Matter – Measurement – Balance – Volume

Keywords: Chemical reactions – Daily life – Change – Energy

Keywords: Weightless – Water – Gravity – Buoyancy – Space

Objective: To identify indicators of a chemical reaction by observing the temperature change when vinegar reacts with steel wool.Materials: Steel wool ball – Vinegar – Glass cup – Thermometer.Steps: Place a steel wool ball in a glass cup. Pour vinegar over the steel wool and let it sit for 1–2 minut......

Keywords: Physical state change – Melting – Freezing – Evaporation – Condensation

Keywords: Properties – Substances – Chemical reaction – Before reaction – After reaction – Changes

Objective: To prove that gases have volume and occupy spaceMaterials: Two equal balloons – two rulers – 15 cm strings – a heavy book – adhesive tape – clips – scissorsSteps: Inflate both balloons to the same size and tie them tightly Cut three pieces of string Tie both balloons to one ruler evenly o......

Objective: To study the effect of heating on the temperature of water and observe the changes in its physical state (from liquid to vapor) during boiling.Materials: Beaker – Thermometer – Bunsen burner – Tripod stand – Wire gauze – Graduated cylinder – Clamp stand – Heat-resistant base.Steps:Measure......

Objective: To investigate the relationship between the amount of transferred thermal energy and the temperature of waterMaterials: Polystyrene cup – immersion heater – thermometer – electronic balance – joule meter – stopwatch – metal stand – stirring rodProcedure: Measure the mass of water in the p......

Objective: To observe and identify the boiling point of waterMaterials: Glass beaker – water – thermometer – electric heaterProcedure: Pour a quantity of water into the glass beaker Place the beaker on the electric heater Insert the thermometer into the water and wait two minutes before starting to......

Objective: To identify the effect of particle size on the rate of dissolution in water.Materials: Two glass cups – chicken soup cube – powdered chicken soup – spoon – waterProcedure: Pour an equal volume of water into each glass. Place the soup cube in the first glass. Place the powdered soup in the......

Objective: To investigate how water, oil, and food coloring interact and observe whether the substances mix or remain separate.Materials: Test tube – water – vegetable oil – food coloringProcedure: Pour some water into the test tube. Add some vegetable oil slowly into the test tube. Add two drops of......

Keywords: Chemical reaction – Precipitate – Reactants – Products – Chemical change – Observation

Keywords: Tools – Equipment – Laboratory – Chemical experiments – Identification – Safety

Objective: To distinguish between a mixture and a compound through the reaction of iron and sulfur.Materials: Two dishes – stirring tool – boiling tube – test tube holder – sulfur powder – iron filings – steel wool – magnet.Steps: Place some iron filings in a glass beaker, add yellow sulfur powder,......

Objective: To distinguish between saturated and unsaturated hydrocarbons.Materials: Test tubes – dropper – test tube holder – cyclohexane solution – cyclohexene solution – bromine water.Steps: Place a small amount of cyclohexane in test tube (1). Place an equal amount of cyclohexene in test tube (2)......

Objective: To identify the effect of temperature on chemical changes and observe milk spoilage when left at room temperature.Materials: Small glass cup, equal amounts of milk.Steps: Pour equal amounts of milk into two small cups. Place the first cup in the refrigerator. Leave the second cup on a kit......

Objective: To identify the compounds that make up an unknown substance by comparing its reactions with known substances such as starch, sugar, and baking powder.Materials: Test tubes, sugar, starch, baking powder, unknown substance, water, iodine solution, sodium bicarbonate solution, dropper.Steps:......

Objective: To identify materials that dissolve in water and materials that do not.Materials: Three transparent cups _ Water _ Salt _ Sugar _ Sand _ Stirring spoonSteps: Put some water in each cup. Add a small amount of salt, sugar, and sand to the three cups of water. Stir each cup using the spoon a......

Objective: To understand the different properties of organic compounds (such as sugar, perfume, and oil) despite containing the same elements: carbon, hydrogen, and oxygen.Materials: Sugar _ Perfume _ Vegetable oil _ Glass cups _ Hot water _ SpoonSteps: Place a spoonful of each substance (sugar, per......

Objective: To test for the presence of the carbonate ion.Materials: Sodium carbonate salt. Dilute hydrochloric acid. Distilled water. Magnesium sulfate solution. Test tubes.Procedure: Place a small amount of solid sodium carbonate in a test tube. Add a few drops of dilute hydrochloric acid to the tu......

Objective: To identify the difference between exothermic and endothermic reactions. Materials: Glass beaker, teaspoon, thermometer, water, magnesium oxide (MgO), sulfuric acid (H₂SO₄), baking soda (NaHCO₃), vinegar (CH₃COOH).Procedure:Place a small amount of magnesium oxide in a glass beaker.Add an......

Keywords: Glucose – Reducing sugar – Fehling’s solution – Chemical test – Oxidation – Cu²⁺

Keywords: Magnetic properties – Transition elements – Unpaired electrons – Paramagnetism – Diamagnetism – Fe – Co – Ni – Cu – Zn

Keywords: Electrons – Energy levels – Principal quantum number – Electron configuration – Electron shell

Objective: Identify the properties of amphoteric oxides.Materials: Test tubes – test tube holder – spoons – aluminum oxide powder (Al₂O₃) – zinc oxide powder (ZnO) – diluted hydrochloric acid (HCl) – diluted sulfuric acid (H₂SO₄) – diluted sodium hydroxide (NaOH) – small burner – dropper.Procedure:......