Science Test for Wave and Sound

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Waves / Sound

____1. A wave type in which the particles in the medium vibrate at right angles to the direction of the wave is a  A. compression wave B. transverse wave C. surface wave D. longitudinal wave.

____2. The amplitude of a transverse wave is A. equal to the wavelength B. the distance from the
trough to the crest C. the distance from the resting position of the medium to the crest  D. equal to the frequency of the wave.

____.3 A longitudinal wave cannot travel through a vacuum because A. it does not have enough energy      B. there is no amplitude C. longitudinal waves require a media to transfer energy and a vacuum has no medium D. the compressions are too short.

____4. Seismic waves are the result of A. earthquakes B. storms at sea C. tides D. interference solar and lunar gravity waves.

 ____5. The two waves shown on the left have

 A. different speeds   B. identical amplitudes

 C. the same frequencies but different wavelengths 

 D. the same frequencies but different energies. 

     
____6. The best definition of a “wave” is A. energy changing forms B. a parallel movement in a medium      C. a disturbance that travels through a medium or space D. an up and down vibration in a liquid.

____7. Through which material will sound travel fastest? A. air B. iron C. water D. milk.

____8. Which one of the following units is best for indicating the speed of sound? A. m/s    B. Hz
C. db      D. N

____9. Through which material will sound travel slowest? A. air   B. iron    C. water    D. milk.


___10. The diagram below demonstrates which type of wave? A. surface B. transverse    C.compression  D. electromagnetic.
                                   


___11. In the diagram #10 (above) the letter “Y” represents a (n) A. crest B. trough 

C. compression  D. rarefaction

___12. The wave in #10 (above) would most likely be created by A. sound B. light C. a springD. water blowing over the surface of water.

___13. Frequency is determined by A. amplitude B. direction C. wavelength D. trough depth.

___14. “Crest is to trough” as A. frequency is to amplitude B. compression is to rarefaction

C. trough is to wavelength D. frequency is to speed.

___15. The energy in the wave shown here is moving toward the A. left B. right C. top D. bottom.

___16. Which one of the following is not indicated in the diagram? A. crest B. wavelength  C. amplitude     D. resting position of the medium.

___17. Select the true statement. A. Sound travels fastest in gases. B. The denser a given medium, the faster sound travels through it. C. Materials with high elasticity conduct sound faster. D. Temperature does not affect the speed of sound through a given medium.

___18. The decibel (db) is the unit of A. sound intensity (loudness) B. wave frequency C. wave

speed D. light wave energy.

___19. Different frequencies of electromagnetic waves have the same   A. amplitudes                                 B. wavelengths       C. speeds     D. amounts of energy.

What's Wrong with America's Public Schools?

Problems with Public Education

The following list might not be all inclusive, but it’s a start. There is no intention here to focus on the negative, yet America’s schools have real problems. It’s analogous to a sick patient — we must find out what is wrong in order help the patient. So the list may be considered symptoms. They are presented in no particular order. Please feel free to comment and add what you wish.

1. Overcoming the effects of poverty and dysfunctional homes.

•  22 percent of American children live in poverty

2. Unequal funding around the nation.

3. Inconsistent teacher quality.

4. Too many expectations of teachers. · 

•  paperwork· 
•  meetings· 
•  time lost from instruction· 
•  extra duties
•  stress management

5. States need more funding. 

6. Class sizes often exceed recommendations.

7. Lack of agreement among educators on key issues like: 

•  homework· 
•  discipline· 
•  professional development
•  teacher evaluation 

8. Lack of understanding in key instructional issues like

• assessment and evaluation. 
• classroom management 
• individualized instruction 
• motivation

9. Lack of parental support 

10. Managing individual differences among students.

11. Rigid routines and rules for teachers and students.

12. Teacher salaries do not attract best talent.

13. Lack of administrative leadership.

14. Funding formulas from state to state vary widely.

15. Insufficient parental support and involvement.

16. Over-emphasis on standardized testing.