1. Have your notebook on your desk
Have your notebook on your desk. After we finish with inference and observation, we will be taking notes.

2. WAVES

3. What is a WAVE?
Waves: A repeating disturbance or vibration that transfers or moves energy from place to place. Vibration: A repeated back and forth motion. **WAVES TRANSMITT ENERGY BUT NOT MATTER**

4. How do WAVES carry energy?
Waves can carry energy in 2 ways:
Using a medium: (the material through which waves can travel, solid, liquid, or gas.)
Through a vacuum: (empty space)
All waves can travel through a medium and only some waves can travel through empty space.

5. There are 2 kinds of waves:
Mechanical waves: (medium)
Examples:
Water waves (medium is liquid)
Earthquake/seismic waves (medium is solid)
Sound waves (medium is gas (air))
Waves through ropes (medium is solid)
Waves through springs (medium is solid)

7. VERY IMPORTANT!!!
Sound Waves CANNOT Travel through empty space. Sound must have a medium (air, gas) in order to transfer energy.

8. Why did the cell phone sound not work in the bell jar after the air was removed?

9. A ______ is a disturbance or vibration that transfers or moves energy from place to place.
Medium
Vacuum
Wave
Vibration

10. Electromagnetic Waves: These waves can travel through both mediums (matter) and empty space (vacuum). These waves come from the SUN!
Examples:
Radio Waves
Microwaves
Infrared Radiation
Visible Light
Ultraviolet Rays
X-rays
Empty Space

11. All waves transfer ________ and NOT ______.
Energy, Matter
Matter, Energy
Mass, Energy

12. A __________ is a repeated back and forth or up and down motion.
Medium
Vibration
Wave
Vacuum

13. What is another word for EMPTY SPACE?
Medium
Vibration
Wave
Vacuum

14. A ________ is a material through which waves can travel
A ________ is a material through which waves can travel. It can be solid, liquid, or gas.
Medium
Vibration
Wave
Vacuum

15. Which type of waves have to have a medium in order to transfer energy?
Mechanical Waves
Electromagnetic Waves

16. Which type of waves come from the sun and can travel through both mediums and empty space.
Mechanical Waves
Electromagnetic Waves

17. Would you be able to hear someone talking on the moon?
Yes No

18. Waves that travel through rope Visible Light Radio Wave Sound Wave
Mechanical B. Electromagnetic
Water Wave
Waves that travel through rope
Visible Light
Radio Wave
Sound Wave
Microwave
Ultraviolet Radiation
Seismic Waves
Infrared Rays
X-rays

19. 8/23 Quiz Day/Wave Properties P 6 You do not have to copy the picture
8/23 Quiz Day/Wave Properties P 6 You do not have to copy the picture. Just explain what is happening in the picture (the type of wave, what is it traveling through, and how do you know?…etc)

20. Mechanical Waves travel 2 ways:
Compression (Longitudinal Wave): Particles in the medium vibrate by pushing together and moving apart.
Particle movement and
direction are parallel to
each other .

21. The place on the wave that is pushed together is called compression.
The place on the wave that is pulled apart is called rarefaction.

22. Sound Waves move like compression waves!

23. Transverse Waves: Particles of matter in the medium vibrate by moving back and forth and perpendicular (at right angles) to the direction the wave travels.

24. Crest: The highest point on a transverse wave.
Trough: The lowest point on a transverse wave.

25. Mechanical Waves can travel as a compression (longitudinal wave) or a transverse wave. All electromagnetic waves travel as transverse waves.
Electromagnetic waves traveling as transverse waves.

26. What type of wave is pictured above?
Transverse
Compressional (longitudinal)

27. A B
Which letter represents the crest of this wave?
Which letter represents the trough of this wave?

28. A B
Part A on this longitudinal wave is the part that is pushed together. What is this called?
Compression
Rarefaction
Crest
Trough
2. Part B on this longitudinal wave is the part that is pulled apart. What is this called?
Compression
Rarefaction
Crest
Trough

29. Which of the following is the uppermost part of a transverse wave?
Trough
Compression
Rarefaction
Crest

30. Which of the following is the lowest point
on a transverse wave?
Trough
Rarefaction
Compression
Crest

31. Which of the following do the particles of the wave travel parallel to the direction the wave travels?
Transverse
Compressional (longitudinal)

32. Which of the following do the particles in a wave travel perpendicular to the direction of the wave?
Transverse
Compressional (longitudinal)

33. True B. False
All electromagnetic waves travel as
Transverse waves.

34. Bellwork

35. Properties of Waves
Frequency: A measure of how many waves pass a point in a certain amount of time. The higher the frequency, the closer the waves are together and the more energy carried by the waves will be.

36. This wave has a higher frequency and more energy because it is pushed in more.

37. Amplitude: a measure of the distance between a line through the middle of a wave and a crest or trough. In a transverse wave, the higher the amplitude, the more energy the wave carries. Sounds with greater amplitude will be louder; light with greater amplitude will be brighter The more force that produces a wave, the bigger the amplitude and the more energy the wave will carry.

38. Amplitude: a measure of the distance between a line through the middle of a wave and a crest or trough.
Notice how this wave has the biggest amplitude. Therefore, it carries the most energy and would produce the loudest sound or the brightest light.

39. Wavelength: a measure of the distance from the crest on one wave to the crest on the very next wave. The shorter the wavelength, the more frequency the wave has and therefore the most energy.

41. Speed: a measure of the distance a wave travels in an amount of time
Speed: a measure of the distance a wave travels in an amount of time. Mechanical waves do not travel the same speed through different medium. As a wave passes through a solid, to a liquid, and then to a gas the speed of the wave changes. Electromagnetic waves travel at the same speed through empty space.

43. 1. Which of the following waves would carry the most energy?B C

44. 2. Which wave below carries the least amount of energy?

45. 3. Which letter represents the wavelength of a wave?

46. A B C

47. A B C
Which wave above has the biggest amplitude and would produce
The loudest sound?

48. According to the diagram which wave has the most energy
and the highest frequency?
Radio Waves
Gamma Rays
X-rays

49. Crest
Trough
Amplitude
Wavelength

50. The closer the waves are together, the _____ energy the wave can carry
The closer the waves are together, the _____ energy the wave can carry? A. Less B. More

51. What section of the wave carries the most energy?
What section of the wave carries the least energy?
Which section of the wave has the shortest wavelength?
What section of the wave would produce the loudest sound or brightest light?
Section A
Section B

52. Frequency B. Amplitude
C. Wavelength
_________ is the measure of the distance from the crest on one wave to the crest on the very next wave.
_________ is the measure of the distance between a line through the middle of a wave and a crest or trough.
_________ is a measure of how many waves pass a point in a certain amount of time.

53. A. True or B. False
Mechanical waves can travel the same speed as they pass from a solid to a liquid and then to a gas.
All electromagnetic waves travel the same speed in empty space.
Speed is the measure of the distance a wave travels in a certain amount of time.

54. Motion
Motion: Objects are in motion when its distance changes relative to a reference point.
This picture illustrates motion because as he is riding is distance is changing. The reference points would be the tree or the picnic table. The distance between him and the tree or table is changing.

55. Inertia Inertia: The tendency of objects to resist change in motion.
A bowling ball represents inertia because when you bowl, the ball wants to stay in motion unless it is acted on by another force. Also, this ball has more mass than a basketball so it has more inertia.

56. Your poster should include:
10 vocabulary words A picture for each word A definition for each word An explanation on how your picture illustrates the vocabulary word. A Title that says: MOTION VOCABULARY at the top. (9 points for each word for a total of 90 points) (10 points for neatness)