Bellringer

1
Bellringer

• Which color of light bends the least and why
  red, green, blue

2
Waves

• A Review

3
1.A wavelength of 2mm and a frequency of 3Hz has
a speed of_____.

• 6 mm/s

4
2. ___ reflection occurs when parallel rays of
light hit a smooth surface?
A. Diffuse
B. Irregular
C. Incidental
D. Regular
5
3.If a sound source is moving away from you, you
will hear a _____.
A. higher freqeuncy
B. lower amplitude
C. lower pitch
D. higher pitch
6
4.In _____ waves, the particles of the medium
move at right angles to the direction in which
the wave is traveling.
A. compressional
B. transverse
C. longitudinal
D. sound
7
5.Microwave radiation has a higher frequency than
_______.
A. visible
B. gamma
C. radio
D. ultraviolet
8
6.An opaque object has a particular color because
it reflects some wavelengths of light and _______
the rest.
A. Absorbs
B. Reflects
C. Transmits
D. Echoes
9
7.As the frequency of a wave traveling at
constant speed increases, its _____ decreases.
A. energy
B. wavelength
C. amplitude
D. speed
10
8._____ mirrors are used on the passenger sides
of vehicles to allow for a wider range of view.
A. Concave
B. Plane
C. Convex
D. Fun-house
11
9.Secondary waves CANNOT travel through _____.
A. solids
B. liquids
C. gases
D. plasmas
12
10.Place the colors of light in order from
SHORTEST wavelength to LONGEST wavelength.

• Violet
• Indigo
• Blue
• Green
• Yellow
• Orange
• Red

13
11.Sound is a disturbance that travels through a
medium as a(n) _____ wave.
A. polarized
B. electromagnetic
C. transverse
D. longitudinal
14
12.Waves combine to make a wave with larger
amplitude in a process called _____ interference.
A. refraction
B. destructive
C. mirage
D. constructive
15
13.You have recently shown an interest in the
inner workings of an electric motor. You wonder
exactly how it can go faster when you press the
accelerator with your foot. You plan to design an
experiment to prove that pressing the accelerator
increases the voltage to the electric motor,
therefore making it rotate faster. You devise a
hypothesis that states that if voltage is
increased to the electric motor, then the motor
will increase its revolutions per minute. Which 2
of the following factors, in this scenario, would
be classified as the controlled variables?
the rpms
the wires
the motor
the voltage
16
14.Because the light rays never meet, a concave
lens can produce only a(n) _______ image.
A. black white
B. real
C. holographic
D. virtual
17
15.List the waves of the Electromagnetic Spectrum
from LOWEST frequency to HIGHEST frequency.

• Radio waves
• Microwaves
• Infrared
• Visible light
• Ultraviolet
• X-rays
• Gamma rays

18
16.At room temperature, the speed of sound in air
is approximately how many m/s?
A. 300,000 km/s
B. 343 km/s
C. 343 m/s
D. 300,000 m/s
19
17. The buildup of charges on an object is known
as _____?
A. positive charge
B. static discharge
C. negative charge
D. static electricity
20
18. A virtual image always appears _______.
A. smaller
B. upright
C. larger
D. upside-down
21
19.If something vibrates one thousand times per
second, it has a frequency of 1 _______.
A. GHz
B. Hz
C. kHz
D. MHz
22
20.The colors of visible light with _____ bend
less than others when passing through a prism.
A. higher amplitudes
B. higher frequencies
C. longer wavelengths
D. shorter wavelengths
23
21. Ultraviolet rays help your body to produce
_______..
A. hair
B. vitamin D
C. hormones
D. calcium
24
22.Name the type of wave labeled C.
A. Ultraviolet
B. Visible
C. X-ray
D. Infrared
25
23.In which medium listed in the table does sound
travel slowest?
A. Brick
B. Air _at_ 0C
C. Hardwood
C. Air _at_ 20C
26
24.The speed of a wave on a guitar string is
220m/s and the frequency is 110Hz. What is the
wavelength of the wave?
2 m/s
27
25.Because of _______, glass prisms separate
white light into the visible spectrum of colors.
A. reflection
B. diffraction
C. refraction
D. diffusion
28
26.In a longitudinal wave moving along a spring,
areas where the coils are farthest apart are
called _____.
A. troughs
B. compressions
C. crests
D. rarefactions
29
27. Match each unit on the left with what it
measures on the right.
kWh
Time
W
Current
A
Voltage
O
Resistance
H
Power
Energy
V
30
28.A wave bending as it passes a point of land is
an example of _____.
A. transmission
B. reflection
C. refraction
D. diffraction
31
29. The unit associated with _____ is the hertz.
A. speed
B. frequency
C. amplitude
D. Wavelength
32
30.Suppose that a reflected light wave has an
angle of reflection of 20. What must be the
angle be between the reflecting surface and the
original beam of light?
A. 30
B. 50
C. 70
D. 90
33
31.A tomato will look _______ under blue light?
A. white
B. blue
C. red
D. black
34
32. Of the following, which is the correct speed
of light?
A. 3 x 108 km/s
B. 300,000,000 km/s
C. 343 m/s
D. 3 x 105 km/s
35
33.Which of the following would be classified as
quantitative data?
300,000 km/s
22 nm
hot
transparent
2.44 GHz
blue
36
34.Sound waves with frequencies above 20,000 Hz
are too high for humans to hear. This is known as
_____.
A. ultrasonic
B. hypersonic
C. infrasonic
D. hyposonic