1. What would you measure to determine a wave’s frequency? A.The distance from the crest to the trough B.Its height from the crest to its resting point C.How often a compression crosses a fixed point D.The distance between adjacent crests

2. How do vibrations get from the eardrum to the cochlea? A.Air is pushed into the eardrum. B.Vibrations hit the outer ear. C.The brain first receives a sound wave. D.They pass through the hammer, anvil, and stirrup.

3. Microwaves, gamma rays, X- rays, and infrared waves all travel through empty space. Which type of waves are these? A.Electromagnetic B.Mechanical C.Sound waves D.longitudinal

4. If you observe a piece of white paper placed under a green light, why does the paper appear to be green? A.White paper absorbs all light waves. B.White paper reflects all the light waves shining on it, which in this case is only green light. C.Green light scatters more than all other wavelengths. D.White paper can only absorb green light waves.

5. If air becomes warmer, what happens to the speed of sound? A.It increases. B.It decreases. C.It doesn’t change. D.It oscillates.

6. What is one way that mechanical waves differ from electromagnetic waves? A.Mechanical waves cannot travel through a vacuum. B.Mechanical waves do not carry energy. C.Mechanical waves are not created by a vibration. D.Mechanical waves cannot be described by their wavelength.

7. Why do sound waves travel faster in solids than in the air? A.Solids will not allow waves to be diffracted. B.Solids reflect sound better than gases. C.Molecules in a solid are packed closer together than in a gas. D.The molecules in air vibrate too rapidly to transmit sound.

8. Amplitude is measured in which unit? A.Meters B.Meters/second C.Decibels D.Hertz

9. Gabriel is standing on a street corner as an ambulance approaches. As the ambulance gets closer, the pitch of the sound waves is higher. Then, as an ambulance passes and moves farther away the pitch decreases. Based on this information, what do the sound waves from the siren have when the ambulance is being driven toward? A.The same frequency B.A higher frequency C.A decreasing frequency D.A lower frequency

10. An automobile changes energy stored in gasoline into different forms. The total amount of energy does not change due to the A.Energy efficiency of the car B.Law of conservation of energy C.Process of recycling matter D.Production of new energy as needed.