Question

electromagnetic spectrum color by numbers
directions: answer each question by circling the correct choice. after you have completed all the questions color the picture using the assigned colors. for any unnumbered sections simply follow the pattern

1. which has the longest wavelength and, therefore, the lowest frequency/energy?

radio waves (yellow)
infrared (light blue)
gamma rays (pink)

1. which section of the spectrum is the only one we can see?

microwaves (yellow green)
x - rays (pink)
visible light (red)

1. as the frequency of an electromagnetic wave increases, the amount of energy in that wave

increases (yellow orange)
decreases (light blue)
stays the same (purple)

1. how are electromagnetic waves different from mechanical waves?

mechanical waves do not require a medium (yellow green)
electromagnetic waves do not require a medium (blue)
electromagnetic waves are longitudinal (purple)

1. which has the shortest wavelength and, therefore, the highest frequency/most energy?

radio waves (light blue)
visible light (pink)
gamma rays (red orange)

1. which of the following has wavelengths longer than microwaves?

radio waves (magenta)
ultraviolet (pink)
x - rays (green)

1. all waves carry

matter (yellow orange)
energy (yellow green)
particles (pink)

1. which part of the spectrum is associated with heat because it can cause molecules to vibrate and rotate generating thermal energy?

visible light (green)
ultraviolet (magenta)
infrared (sky blue)

1. the electromagnetic spectrum includes the complete range of electromagnetic waves placed in order of

increasing amplitude (magenta)
increasing energy and frequency (green)
increasing wavelength (red orange)

1. which of the following has frequencies higher than ultraviolet rays?

x - rays (orange)
infrared (magenta)
radio waves (pink)

1. when electromagnetic waves pass through materials like air, water, or glass, their speed

decreases (light blue)
increases (aqua green)
stays the same (sky blue)

1. which of these is an example of a wave with a long wavelength and low frequency?

ultraviolet (magenta)
visible light (green)
microwaves (pink)
13.what type of electromagnetic wave has a higher frequency than visible light and a larger wavelength than x - rays?
gamma rays (yellow orange)
ultraviolet (purple)
infrared (pink)

1. in a vacuum, all electromagnetic waves all have the same

wavelength (yellow green)
frequency (orange)
speed (pink)

Explanation:

1. Radio waves have the longest wavelength and lowest frequency/energy in the electromagnetic spectrum.
2. Visible light is the only part of the spectrum we can see.
3. Energy of an electromagnetic wave is directly proportional to its frequency (\(E = h

u\), where \(h\) is Planck's constant and \(
u\) is frequency), so as frequency increases, energy increases.

1. Electromagnetic waves do not require a medium to travel (unlike mechanical waves).
2. Gamma rays have the shortest wavelength and highest frequency/most energy.
3. Radio waves have longer wavelengths than microwaves.
4. All waves carry energy.
5. Infrared is associated with heat as it causes molecular vibration and rotation.
6. The electromagnetic spectrum is ordered by increasing energy and frequency.
7. X - rays have higher frequencies than ultraviolet rays.
8. When electromagnetic waves pass through materials like air, water, or glass, their speed decreases (due to interaction with the medium).
9. Microwaves (among the options) can be considered as having relatively long wavelengths and low frequencies (compared to some other electromagnetic waves in the options).
10. Ultraviolet has a higher frequency than visible light and a larger wavelength than X - rays.
11. In a vacuum, all electromagnetic waves have the same speed (\(c = 3\times10^{8}\space m/s\)).

Answer:

1. A. radio waves (yellow)
2. C. visible light (red)
3. A. increases (yellow orange)
4. B. electromagnetic waves do not require a medium (blue)
5. C. gamma rays (red orange)
6. A. radio waves (magenta)
7. B. energy (yellow green)
8. C. infrared (sky blue)
9. B. increasing energy and frequency (green)
10. A. x - rays (orange)
11. A. decreases (light blue)
12. C. microwaves (pink)
13. B. ultraviolet (purple)
14. C. speed (pink)