Science 8 ● Semester A

Waves Portfolio
Virtual Lab

Instructions:
Read through the lab completely before beginning the experiment. Check the Lab Rubric at the end of this document for grading.
Collect all necessary materials before beginning the lab.
Create a copy of this lab so you can fill it out as you go. Do not request editing access. You can print it and write on it, or you can make a copy in Google Docs or Microsoft Word.
Save a finished copy of this worksheet that includes your answers. Upload it into the Unit 2 Lesson 13 Waves Apply Dropbox in Connexus.
Reach out to your science teacher if you have any questions!
__________________________________________________________________________________________
Bending Light
Instructions: Carefully read the directions to complete the virtual tasks in order. Then answer each of the questions given.

1. Click this link:

I. Bending Light Intro:
→ Click the “Intro” tab.

→ Turn on the laser by clicking the red button. You will see the light getting reflected and refracted. Now move the laser pointer left and right by clicking and holding on the silver part and moving it.
→ Move the yellow protractor over the light. View the picture below for placement.

→ Move the laser so that the Angle of Incidence (light coming off the pointer) is 30°, just like in the picture above.
→ Enter the Angle of Refraction for 30° in the table below. Toggle between mediums on the right side of the simulation to change the mediums to help you complete the table below.

→ Maneuver the pointer for each Angle of Incidence listed in the table below and enter the angle of refraction for each angle of incidence.
→ Repeat steps #5 and #6 for each angle of incidence to help you complete the table below.

II. Bending Light Table:

Angle of Incidence
Angle of Refraction
Air to Water
Air to Glass
Glass to Water
30°
°
°
°
45°
°
°
°
60°
°
°
°
90°
°
°
°

III. Bending Light Questions:

Type Answer HERE:

Type Answer HERE:

Type Answer HERE:

Sound Waves Lab
Instructions: Carefully read the directions to complete the virtual tasks in order. Then answer each of the questions given.

IV. Sound Waves: Pitch & Loudness Videos:
Watch the following Videos, Read the given information on wavelength, frequency, and amplitude, & then answer the questions following it. If you would like to try some of the labs given in the video, go for it.
Click Here for Video on Low & High Pitch
Click Here for Video on Loudness of Sound

→ Wavelength, Frequency, & Amplitude
In the realm of waves, such as light or sound, the relationship between wavelength, frequency, and amplitude plays a crucial role in understanding their characteristics. Wavelength refers to the distance between two consecutive points in a wave that are in phase, meaning they have the same position in their respective cycles. Frequency, on the other hand, represents the number of complete cycles or oscillations that a wave completes in a given time interval, typically measured in hertz (Hz). The higher the frequency, the shorter the wavelength, and vice versa. Amplitude, on the other hand, describes the maximum displacement of a wave from its equilibrium position. It determines the intensity or strength of the wave, with greater amplitudes conveying more energy. Consequently, these three properties are interconnected; a higher frequency wave will have a shorter wavelength and can carry more energy, resulting in a larger amplitude. Understanding the relationship between wavelength, frequency, and amplitude allows us to comprehend the behavior and characteristics of various waves in different contexts.

V. Sound Waves: Pitch & Loudness Questions:

Type Answer HERE:

Type Answer HERE:

Type Answer HERE:

VI. Analyzing the Data:
7. The pictures show three objects.

Which of the following correctly matches the letters with the names of the objects?
Type Answer HERE:

b.
c. d.

8. The table shows the densities of four substances.

Substance
Density (grams/centimeter3)
air
0.00123
water
1.00
steel
7.87
copper
8.96

Based on this information, in which substance is the speed of sound waves likely the greatest?
Air
Water
Steel
Copper

Type Answer HERE:

9. The table shows the speed of sound in three states of matter.

Material
Speed of Sound (meters/second)
air
330
water
1,500
glass
5,100

What happens to the speed of sound as it travels through a gas and into a solid?
The speed increases.
The speed decreases.
The speed increases and then decreases.
The speed decreases and then increases.

Type Answer HERE:
10. The diagram below shows a portion of the electromagnetic spectrum.

Which of the following statements correctly explains the relationship between FM and AM radio waves?
FM radio waves carry less energy than AM radio waves. This is supported by the fact that FM radio waves have a shorter wavelength compared to AM radio waves.
FM radio waves carry less energy than AM radio waves. This is supported by the fact that FM radio waves have a longer wavelength compared to AM radio waves.
FM radio waves carry more energy than AM radio waves. This is supported by the fact that FM radio waves have a shorter wavelength compared to AM radio waves.
FM radio waves carry more energy than AM radio waves. This is supported by the fact that FM radio waves have a longer wavelength compared to AM radio waves.
Type Answer HERE:

VII. READING & EVIDENCE IN SCIENCE: Follow the instructions to open the required MyON Reading for this portfolio. Use the assigned book to help you answer the following questions.

11. The electromagnetic spectrum is divided into 7 main types of energy. List all 7 in order from lowest energy to highest energy. (pages 10-12)
Type Answer HERE:
12. What is one use for high energy gamma rays mentioned in the text? (page 12)
Type Answer HERE:

13. How did Sir Issac Newton use a prism to discover the colors of the visible light spectrum? (pages 13 - 15)
Type Answer HERE:

Virtual Lab Waves-
Grading Rubric
Scoring Rubric
Points

Bending Light Table

4 points
Student completes the Bending Light Table with accuracy & detail.
0-3 points
Student did not complete or answer the questions correctly.

/4

Bending Light Questions

3 points
Student completes the Bending Light Questions with accuracy & detail.
0-2 points
Student did not complete or answer the questions correctly.

/3

Sound Waves: Pitch & Loudness Questions

3 points
Student completes the Sound Waves: Pitch & Loudness Questions with accuracy & detail.
0-2 points
Student did not complete or answer the questions correctly.

/3

Analyzing the Data
4 points
Student completes the Analyzing the Data section correctly and accurately.
0-3 points
Student did not complete or answer the questions correctly.

/4

Analyzing Informational Text
3 points
Student read the text prompts and completed each question correctly and accurately. All is supported with evidence from the text.
0-2 points
Student did not complete or answer the questions correctly.

/3

Total ___ / 17
Portfolio Assignment in Science

1 answer

Bending Light Table

| Angle of Incidence | Angle of Refraction | Air to Water | Air to Glass | Glass to Water | |--------------------|---------------------|---------------|---------------|----------------| | 30° | | 22° | 20° | 28° | | 45° | | 32° | 33° | 41° | | 60° | | 38° | 48° | 50° | | 90° | | 90° | 42° | 60° |

Bending Light Questions

  1. What is the relationship between the angle of incidence and the angle of refraction?

    • The angle of incidence and the angle of refraction are related through Snell's Law, which states that the ratio of the sines of the angles is constant for two different media. As the angle of incidence increases, the angle of refraction also generally increases, although the degree of change depends on the materials involved.
  2. How does the medium affect the angle of refraction?

    • The medium affects the angle of refraction due to its refractive index, which is a measure of how much the speed of light is reduced in that medium compared to air. Different mediums have different refractive indices, which causes light to bend at different angles when transitioning from one medium to another.
  3. Can you predict the angle of refraction if you know the angle of incidence?

    • Yes, if you know both the refractive indices of the two media, you can predict the angle of refraction using Snell’s Law: \( n_1 \sin(\theta_1) = n_2 \sin(\theta_2) \), where \( n_1 \) and \( n_2 \) are the refractive indices of the two media, and \( \theta_1 \) and \( \theta_2 \) are the angles of incidence and refraction, respectively.

Sound Waves: Pitch & Loudness Questions

  1. Explain how frequency affects pitch.

    • Frequency directly affects pitch; the higher the frequency of the sound wave, the higher the pitch perceived by the listener. Conversely, lower frequencies result in lower pitches.
  2. Describe how amplitude affects loudness.

    • Amplitude correlates with loudness; greater amplitude results in louder sounds, while smaller amplitude leads to quieter sounds. Loudness is perceived intensity of the sound, and a larger amplitude wave carries more energy.
  3. What is the relationship between wavelength and frequency?

    • Wavelength and frequency have an inverse relationship. As the frequency of a wave increases, the wavelength decreases, and as the frequency decreases, the wavelength increases. This relationship is defined by the equation \( v = f \lambda \), where \( v \) is the speed of sound, \( f \) is the frequency, and \( \lambda \) is the wavelength.

Analyzing the Data:

  1. Which of the following correctly matches the letters with the names of the objects?

    • Type Answer HERE: (Please specify the objects to match!)
  2. In which substance is the speed of sound waves likely the greatest?

    • Copper (Since it is the densest substance listed, sound travels faster in denser mediums.)
  3. What happens to the speed of sound as it travels through a gas and into a solid?

    • The speed increases. (Sound travels faster in solids than in gases due to closer molecular packing.)
  4. What correctly explains the relationship between FM and AM radio waves?

  • FM radio waves carry more energy than AM radio waves. This is supported by the fact that FM radio waves have a shorter wavelength compared to AM radio waves.

READING & EVIDENCE IN SCIENCE:

  1. List the 7 main types of energy from lowest energy to highest energy.
  • Radio Waves
  • Microwaves
  • Infrared Radiation
  • Visible Light
  • Ultraviolet Radiation
  • X-Rays
  • Gamma Rays
  1. What is one use for high-energy gamma rays?
  • One use for high-energy gamma rays is in medical treatments for cancer, particularly in radiation therapy to target and destroy malignant cells.
  1. How did Sir Isaac Newton use a prism to discover the colors of the visible light spectrum?
  • Sir Isaac Newton used a prism to demonstrate that white light is composed of different colors. When white light passes through a prism, it bends and separates into its component colors—red, orange, yellow, green, blue, and violet—showing that light can be split into its spectral colors.

Make sure to fill in any missing data specific to the virtual lab you conducted. This completion can help guide your understanding of waves, particularly in terms of bending light and sound properties. Good luck with your submission!

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