https://youtube/watch?v=GkNJvZINSEY

1. From Finland To Italy Through CLIL PHYSICS: https://www.youtube.com/watch?v=GkNJvZINSEY

2. 1) Choose the correct word: A wave has two main characteristics: 1. it is a travelling energy/disturbance;2. it carries energy/disturbance from one place to another. We will consider two basic types of waves: For transverse/longitudinal waves:the direction of the disturbance (displacement) is perpendicular/parallel to the direction of wave motion. For transverse/longitudinal waves:the direction of the disturbance (displacement) is perpendicular/parallel to the direction of wave motion.

3. 1) Choose the correct word: KEYS We will consider two basic types of waves: For transverse/longitudinal waves:the direction of the disturbance (displacement) is perpendicular/parallel to the direction of wave motion. For transverse/longitudinalwaves:the direction of the disturbance (displacement) is perpendicular/parallelto the direction of wave motion. A wave has two main characteristics: 1. it is a travelling energy/disturbance;2. it carries energy/disturbance from one place to another.

4. 2) Fill in each gap the correct word from the list: position, patterns, amplitude A, periodic, successive, length,series, source, displacement, wavelength λ, cycle Transverse and longitudinal waves are called ………….. waves because they consist of regularly repeating …………….. that are produced over and over again by the …………. Example: draw a transverse momentum wave and define the amplitude and wavelength. These definitions also apply to longitudinal waves. In the diagram, a single ............... of the wave is highlighted in colour. A wave is a …………… of these repeating cycles. The ……………………….. is the maximum ……………………… of a particle from its undisturbed ……………………... The …………………………….. is the spatial period of the wave in the direction of motion: the horizontal …………………. of one cycle of the wave or the distance between any two ……………………………. points with the same phase.

5. 2) Fill in each gap the correct word from the list: KEYS Example: draw a transverse momentum wave and define the amplitude and wavelength. These definitions also apply to longitudinal waves. In the diagram, a single cycle of the wave is highlighted in colour. A wave is a series of these repeating cycles. The amplitude Ais the maximum displacement of a particle from its undisturbed position The wavelength λis the spatial period of the wave in the direction of motion: the horizontal length. of one cycle of the wave or the distance between any two successive points with the same phase. Transverse and longitudinal waves are called periodic waves because they consist of regularly repeating patterns that are produced over and over again by the source

6. 3) Fill in each gap the correct word from the list: simple, required, as well as, one, relationship, time, single, wave, frequency. The period T [s]is the time …………….. for ……………. complete cycle. It is related to the ………………… by:f = 1/T [Hz]. For any periodic wave, the …………………..between period, wavelength, and speed is given by: This relationship applies to longitudinal ………………… to transverse waves. A ………………… can be described as a function of ……………….. by observing the change in displacement of a ……………………….. point on the wave. As the wave passes, the point under observation oscillates in ………………. harmonic.

7. 3) Fill in each gap the correct word from the list: KEYS A wave can be described as a function of time by observing the change in displacement of a single point on the wave. As the wave passes, the point under observation oscillates in simple harmonic. The period T [s]is the time requiredfor one. complete cycle. It is related to the frequency by:f = 1/T [Hz]. For any periodic wave, the relationshipbetween period, wavelength, and speed is given by: This relationship applies to longitudinal as well as to transverse waves.

8. 4) Complete the text: the, or, by (2), with, as, up, of, in (2), per. Sound is carried …….. longitudinal waves that are created ……. vibrating objects, such ……. a guitar string …… human vocal cords, or the diaphragm ……. a loudspeaker. Sound can be createdor transmitted only …… a medium,such as a gas, liquid, …… solid. Sound cannot propagate….. a vacuum. A sound can be made ……. of several overlapping waves with different frequencies. A sound …….. a single frequency is called a pure tone. Sound has an associated frequency, which is the number of cycles ….. secondpassing a given location.

9. 4) Complete the text: KEYS Sound can be createdor transmitted only in a medium,such as a gas, liquid, or solid. Sound cannot propagatein a vacuum. A sound can be made up of several overlapping waves with different frequencies. A sound with a single frequency is called a pure tone. Sound has an associated frequency, which is the number of cycles per secondpassing a given location. Sound is carried by longitudinal waves that are created by vibrating objects, such as a guitar string, the human vocal cords, or the diaphragm of a loudspeaker.

10. 5) Working in pairs, discuss the table and the picture: Sound travels through …………………………………………………………………………… The speed of wave depends on ………………………………………………………………… The speed of sound and the speed of light The speed of light is ……………………………… Therefore, lightning and thunder …………………

11. 5) Working in pairs, discuss the table and the picture: KEYS The speed of sound and the speed of light The speed of light is much greater than the speed of sound. Therefore, lightning and thunder don’t reach the observer at the same time …. Sound travels through gases, liquids, and solids at considerably different speeds The speed of wave depends on the properties of the medium it is travelling in.

12. 6) Decide if the following statements are true or false:

13. 6) Decide if the following statements are true or false: KEYS

14. 7) Match the hints in column one to the terms in column two:

15. 7) Match the hints in column one to the terms in column two: KEYS