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Praxis Middle School Science: Waves & Optics Chapter Exam

Exam Instructions:

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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Question 1 1. Transparency is caused by the _____ of light waves.

Question 2 2. When looking into the inner surface of a silver spoon, you would see the image of your chin projected

Question 3 3. Destructive interference occurs when the crest of one wave lines up with the _____ of another wave.

Question 4 4. As the frequencies of the pure spectral colors increase, the wavelengths of the colors:

Question 5 5. The theory of wave-particle duality states that all matter has properties of

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Question 6 6. Chlorophyll is a plant pigment that absorbs all frequencies of light except for

Question 7 7. Standing waves can only occur in a medium that is

Question 8 8. When studying the photoelectric effect, scientists observed that _____were emitted from metal in response to a beam of light.

Question 9 9. A ray of light striking a mirror at an angle of incidence of 35 degrees would reflect off the mirror at an angle of reflection of

Question 10 10. While the actual frequency does not change, the apparent frequency may change if the wave source is

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Question 11 11. Standing waves occur as a combination of constructive interference and

Question 12 12. Sunscreen is _____ to visible light waves and _____ to ultraviolet light.

Question 13 13. Which of the following is NOT a pure spectral color?

Question 14 14. Which of the following is an example of light behaving like a particle?

Question 15 15. Scientists questioned the wave theory of light when they saw that increasing the light intensity would only increase the _____ of emitted electrons.

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Question 16 16. Resonance of light waves results in

Question 17 17. Which of the following represents the six spectral colors in order of increasing frequency?

Question 18 18. Both diffuse and specular reflection will cause an object to appear

Question 19 19. If 100% of the light frequencies resonate with the electrons of an object, then the object will exhibit

Question 20 20. When a light source is quickly approaching you, you may perceive a

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Question 21 21. A sonic boom is produced when an airplane travels

Question 22 22. An ambulance siren moving toward you will have a _____ pitch than when it is traveling away from you.

Question 23 23. In observing two interfering waves, the amplitude of the resulting wave can be found at every point using the principle of

Question 24 24. The carotenoids on a yellow bird's feathers absorb all light frequencies except for

Question 25 25. When the vibrations of one object match the resonant frequency of a second object, the first object increases the _____ of the vibrations of the second object.

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Question 26 26. Pigments create the appearance of color through _____ absorption.

Question 27 27. Which of the following is NOT a source of visible light?

Question 28 28. It is useful to think of a photon as a packet of

Question 29 29. Resonance of sound waves results in

Question 30 30. When playing a trumpet, the vibrations made by the lips on the mouthpiece have to match the resonant frequency of

Praxis Middle School Science: Waves & Optics Chapter Exam Instructions

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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