What causes oscillation?

the goal:Explanation of thermal energy transformations.Materials and tools:Magnesium sulfate - Calcium chloride - Distilled water - Glass beaker - Thermometer - Scale - Glass pipette - Spoon.Steps:1- Fill the glass beaker with 100 ml of water and record the temperature using the thermometer.2- Weigh......

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-......

static friction and sliding friction

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

the goal:Designing a Model for Electric Current Flow in a Simple Electrical CircuitMaterials and tools:Plastic funnel - Plastic tubes of different diameters - Metric ruler - Stand with clamp - Stopwatch - Two glass cupsSteps:1. Place the glass cup under the ring stand and secure the plastic tube in......

Keywords: Battery – Galvanic cell – Chemical reaction – Voltage – Storage

Keywords: Acceleration – Deceleration – Speed – Time – Motion – Graphical representation

the goal:A graphic representation of the relationship between distance and time of a bowling ball while it is being rolled.The connection between the movement of a bowling ball and another type of movement.Materials and tools:A number of bowling balls - stopwatch - large cushion or any soft objectSt......

Brightness in the dark

the goal:The amount of water absorbed by mosses Materials and tools:Glass beaker - water - string - moss plant - scale - stopwatch - maskSteps:1- Put a quantity of moss plant on a piece of thin cloth, then tie it in the form of a ball.2- Measure the mass of the cloth ball containing the algae.3......

Animal and plant cell under a microscopeKeywords (English): animal cell – plant cell – microscope – nucleus – organelles

Watching onion cells (introductory experiment)Keywords (English): onion cells – microscope – cell wall – nucleus

Keywords: Weight – Mass – Gravity – Force – Balance

the goal:Inference: Cells use food or sugar to produce energy. Note the mitochondria in different cells.Materials and tools:Listed equipment - 2% glucose solution - resealable plastic bag - small weights - glass beaker - water bath at 37 degrees CelsiusSteps:1. Put a quantity of glucose solutio......

Keywords: Newton’s second law – Force – Mass – Acceleration – Equation F=ma

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

Keywords: Radiation – Alpha rays – Beta rays – Gamma rays – Radioactivity – Nucleus

the goal:- Explaining the relationship between buoyant force, weight of an object in air, and its apparent weight in water.- Applying the Archimedes' principle to buoyancy.- Inferring the effect of surface area and known mass density on the amount of water displaced.Materials and tools:Different wei......

Keywords: Earthworm – Anatomy – Segments – Digestive system – Circulatory system

Force and Acceleration force – acceleration – Newton’s second law – mass

How do generators work?Keywords (English): electric generator – induction – magnetic field – electric current

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......