Science Please Help Me

1.A weatherman reports, “The storm waves are about 2 meters high and about 35 meters apart.” What properties of waves is the reporter describing? (1 point)

A.frequency and wavelength
B.wavelength and wave speed
C.amplitude and wavelength
D.amplitude and frequency

2.
Soundproof rooms take advantage of which property of waves? (1 point)

A.absorption
B.regular reflection
C.Refraction
D.diffuse reflection

3.
When the energy of a sound wave is transferred to a particle of a medium and causes it to vibrate and generate heat, the sound wave is (1 point)

A.reflected.
B.refracted.
C.absorbed.
D. Transmitted.

5.
The pitch of the siren of a moving fire truck changes from high to low as the fire truck passes by. What property of a sound wave changes as the fire truck goes by? (1 point)

A.amplitude
B.density
C.temperature
D. frequency

6.
Sonar is used to inspect pipelines and bridge foundations. In this scenario, sonar takes advantage of the fact that (1 point)

A.sound waves can reflect.
B.sound waves can diffract.
C.sound waves can spread out.
D.sound waves can refract.

7.
Which of the following correctly describes a gamma ray? (1 point)

A.long wavelength and low frequency
B.long wavelength and high frequency
C.short wavelength and low frequency
D.short wavelength and high frequency

8.
Which of the following is true about all electromagnetic waves in a vacuum? (1 point)

A.They all carry the same energy.
B.They all travel at the same speed.
C.They all have the same frequency.
D.The all have the same wavelength.

9.
FM signals travel as changes in (1 point)

A.the speed of the wave.
B.the amplitude of the wave.
C.the frequency of the wave.
D.the loudness of the wave.

10.
What is the principle role of a tower within a cellular system? (1 point)

A.to track data usage
B.to transmit signals
C.to pinpoint locations
D.to reduce line noise

11.
Henri Becquerel expected to see only weak images on the photographic plate containing the uranium salt because he thought (1 point)

A.fluorescent minerals needed direct sunlight to produce radio waves.
B.fluorescent minerals needed direct sunlight to produce X-rays.
C.fluorescent minerals needed direct sunlight to produce microwaves.
D.fluorescent minerals needed direct sunlight to produce gamma rays.

12.
Marie and Pierre Curie noticed burns on their fingers after handling test tubes containing radioactive substances. This observation led to (1 point)

A.the discovery of natural fluorescence. B.the discovery of X-rays.
C.the discovery of radiation therapy.
D.the discovery of uranium.

13.
How does radioactivity make it possible to understand how Earth can be so old and still have a hot interior? (1 point)

A.Radioactive elements trap heat from underground magma chambers.
B.Radioactive elements absorb heat from the atmosphere and release it underground.
C.Radioactive elements near the core release heat as their nuclei decay.
D.Radioactive elements absorb the cold temperatures underground.

14.
The speed of sound depends on (1 point)

A.the loudness of the sound.
B.the pitch of the sound.
C.the source of the sound.
D.the properties of the medium it travels through.

15.
The image of a mountain can be seen on the surface of calm water. What property of light is demonstrated? (1 point)

A.diffuse reflection
B.diffraction
C.refraction
D.regular reflection

My Answers:
1.A
2.C
3.C
4.B
5.A
6.A
7.D
8.C
9.A
10.B
11.D
12.D
13.A
14.C
15.B

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asked by Sarr3
  1. R THESE THE RIGHT ANSWERS ?

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    posted by JAMES
  2. Did you get all of them right on the test

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    posted by Nathan
  3. Were these answer right on the test?

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  4. are these right answers? I want to make sure I got them right because I want to make sure I got them right

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  5. Wow, I always check after I do a test to see if there are any cheaters. All connexus students come here apparently. Almost all of these are wrong.

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  6. What did you get on the test

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    posted by Alicia
  7. We don't care @Anonymous! r these the answers?

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  8. OK I just did the test and used these answers and they were all wrong and I'm so disappointed now and I don't know if my teacher will let me do it again but if I do get to do it again I will not use these answers

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    posted by olivia
  9. could u at least tell us the answers to the questions!! pls i only have until midnight help us pls

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  10. Hehe. You all, have been thoroughly and beautifully deceived. Unless of course this wasn't a mastermind prank. In which case, I shun thou for sucking terribly at science. Anyhow, I'll take the test and put the answers down, to make you all happy.

    So I got 20/23 Questions correct.

    1. C
    2. C
    3. A
    4. A
    5. C
    6. A
    7. D
    8. D
    9. A
    10. D
    11. B
    12. B
    13. C
    14. B
    15. C
    16. B
    17. C
    18. D
    19. A
    20. B
    21. C
    22. C
    23. D

    You're welcome :::;D

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  11. were the three you got wrong put in this list?

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  12. THANK YOU SO MUCH!!!!

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    posted by kim
  13. Actually. Only 16 out of those 23 are right. I wouldn't trust it

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    posted by Bri
  14. any one want to tell me the answers?? ccmon plzzzz anyone

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  15. what were they?

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    posted by HELP
  16. okay for anyone who wants the correct answers i got 23/23

    c
    b
    a
    a
    c
    a
    d
    d
    a
    d
    b
    b
    c
    b
    c
    b
    c
    d
    a
    b
    c
    c
    b

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  17. 1.C
    2.2
    3.A
    4.A
    5.C
    6A
    7D
    8C
    9A
    10D
    11B
    12B
    13C
    14B
    15C
    16B
    17C
    18D
    19A
    20B
    21C
    22C
    23D I GOT 100% FOLLOW THESE

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  18. Is Gohan san right?

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  19. I would like the qestions for 16-23 please

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  20. Gohan San is correct!!
    I got 23/23!!!!
    Woo ho!!

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  21. Are they correct ???

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  22. ARE THE CORRECT GEEEESH

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  23. @Gohan san was right. (for THIS test anyway)

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    posted by Layla
  24. Gohan San is a life saver

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    posted by Santana
  25. Gohan san is correct but 8. Is D. Color

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  26. So, @Gohan san are these for a different test are for the same questions as him

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  27. There the same for the same test
    @Khaiguy0900

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    posted by cflex
  28. Omg thank you Gohan

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  29. gohan is right except 8 the answer is D color

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    posted by Math 7
  30. thanks a ton gohan you got me a 23/23

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    posted by anymous
  31. @math 7 r u an ediot? its speed.

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  32. Everything except 8 is right. Number is 8 is D. color.

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    posted by jyvgh
  33. I am a concexs student and i am not sure these are correct plz help

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