Keywords: Sound resonance – Frequency – Vibration – Medium – Sound amplification – Sound waves

The Graphical Representation of Oscillatory MotionKeywords (English): oscillatory motion – graph – time – amplitude – frequency

Unit one: periodic motion. Lesson two: wave motion.Keywords (English): wave motion – waves – vibration – energy – propagation

the goal:To study the relationship between the pitch of a sound and its source frequency.Materials and tools:Large size book - rubber band - two pensSteps:1- Tie a rubber band around the book and place the two pens under the tape near the ends of the book2- Press the index finger of the left hand on......

Unit Two: Sound and Light. Lesson 1: Characteristics of sound waves.Keywords (English): sound – density – sound intensity – wave propagation – medium

Unit Two: Sound and Light. Lesson 1: Characteristics of sound waves.Keywords (English): Savart wheel – centripetal force – acceleration – circular motion

purpose of experienceHow to measure an object's weight by using a spring scaleToolsspring balance - the object to be weighed (sandbag) - tripodstepsWelcome, you are going to do an experiment showing how to measure an object's weight by using a spring scale. Look at the theoretical framework on the l......

Unit one: periodic motion. Lesson 1: Vibrating motion.Keywords (English): oscillatory motion – vibrations – frequency – amplitude – period

Keywords: Transverse waves – Vibration – Amplitude – Crest – Trough

Proving the law of levers by using spring balanceKeywords (English): lever law – spring balance – force – arm – fulcrum

Keywords: Sound – Measurement – Frequency – Waves – Vibration – Sound intensity

Objective: To explore how the pitch of sound changes when blowing into bottles containing different amounts of water.Materials: Equal-sized glass bottles – food coloring – waterSteps: Fill each bottle with a different amount of water. Add a few drops of food coloring to make the water levels easier......

What causes oscillation?

Keywords: Waves – Spring – Vibration – Energy – Propagation

Wavelength measurement wavelength – waves – frequency – vibration – wave speed – wave physics

Objective: To observe how waves propagate in water and study the effect of depth on wave speed and direction.Materials: Tray – Water – Ruler – Disc.Steps: Take a water-resistant tray and fill it with water to a depth of about 1 cm. Lift one edge of the tray slightly and let it fall gently to generat......

Objective: To verify that sound requires a material medium to travel, and that solid media transmit sound more efficiently than air.Materials: Two cups – Sharp object to make a hole – Long string.Steps: Make a small hole in the bottom of each cup. Pass the ends of the string through the holes and ti......

Objective: To understand how sound is reflected when it hits a reflective surface.Materials: Sound source – Cardboard tubes – Hard reflective surface – Sound barrier – Paper.Steps: Place the sound source inside the first tube and point it toward the reflective surface. Move the second tube until the......

Objective: To explore the ability of different materials to insulate and reduce sound by comparing sound levels after using various insulating materials.Materials: Different insulating materials (such as paper, bubble wrap, blanket). Sound source. Box with a lid. Sound level meter.Steps: Place the s......

Objective: To understand the principle of echolocation by using light and a mirror to model how bats and dolphins locate objects.Materials: Small flat mirror _ Light source _ Piece of cardboard _ Four small supports to raise the cardboard above the mirror.Steps: Place the mirror vertically on the ta......

Keywords: Rubber band guitar – Sounds – Vibration – String – Frequency – Music