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: Atmospheric pressure – Altitude – Barometer – Air – Air density

Keywords: Magnetic force – Magnet – Poles – Attraction – Repulsion

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

Comparison of different types of blotting papersKeywords (English): paper towel – absorption – water – comparison – porous materials

Volcano eruptionvolcanic eruption – magma – lava – pressure

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

Objective: To detect the presence of proteins in a sample using the Biuret reagentMaterials: Test tubes _ Test tube rack _ Egg white _ Glucose solution _ Starch solution _ Distilled water _ Biuret reagent _ DropperSteps: Prepare 4 test tubes and place in each one: egg white, glucose, starch, or dist......

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

Keywords: Strong structure – Supports – Balance – Forces – Stability

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

Keywords: DNA replication – Chromosomes – Genetic code – Replication enzymes

Keywords: Earth’s interior – Crust – Mantle – Core – Plates

This experiment demonstrates how the instantaneous velocity of a pendulum changes during its motion. The speed increases as the pendulum approaches the equilibrium position, reaches its maximum value at equilibrium, and then decreases until it becomes zero at the maximum displacement. The velocity v......

Keywords: Metals – Hardness – Luster – Density – Physical properties

Keywords: Rock dissolution – Acids – Reaction – Carbonates – Carbon dioxide

Keywords: Metals – Hardness – Luster – Density – Physical properties

Keywords: Waves – Spring – Vibration – Energy – Propagation

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

Keywords: Excretion – Wastes – Kidneys – Sweat – Carbon dioxide – Detoxification

the goal:To discover how the water content in plants affects their weight.Materials and tools:Balance scale - Apples - Stopwatch - Strawberries - OrangesSteps:1. Weigh some slices of apple using the balance scale.2. Place the apple slices on a plate and let them dry completely, then weigh them again......