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Science > Summative test 2 > Flashcards

Summative test 2 Flashcards

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Biology 101 flashcards
1
Q

is a disturbance that travels
from the source to another place

through a medium.

A

A wave

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2
Q

the object or

substance through
which the wave

travels.

A

Medium

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3
Q

Sources of waves are

A

Vibrating objects

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4
Q

This type of wave:
* Require a medium through which to travel

  • It can be solids, liquids, and gas.
  • Energy is transferred through vibration of

particles of the medium.

A

Mechanical wave

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5
Q

This type of wave:
Do not need a medium to travel

  • Can travel through a vacuum (empty space)
A

Electromagnetic waves

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6
Q

Ths type of wave:
The particles of the medium move up
and down PERPENDICULAR to the
direction of motion of the wave.

A

Transverse waves

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7
Q

This type of wave:
The particles of the medium move in a
direction back and forth PARALLEL to the

direction of motion of the wave.

A

Longitudinal waves

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8
Q

A wave, therefore, can be defined

as a

A

Disturbance

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9
Q

the highest point of the wave

A

Crest

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10
Q

the lowest point of the wave

A

Trough

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11
Q

the midpoint of a wave

A

Equilibrium Position

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12
Q

the height of the wave, measured from midpoint to
either crest or trough; describes the amount of energy

the wave carries

A

Amplitude (A)

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13
Q

distance between succeeding identical parts (one crest
to the next crest or from one trough to the next trough)

A

Wavelength

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14
Q

the number of waves that pass in one second
The greater the __________ of a wave, the higher the

energy is carried by it.

A

Frequency

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15
Q

the time it takes
to complete one

wave

A

Period

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16
Q

speed of the wave as it travels

A

Wave speed

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17
Q

What type of wave is sound

A

Mechanical

18
Q

HOW HUMANS PRODUCE SOUND

A

1.Airflow
2.Vocal chord vibration
3.Sound Wave generation
4. Resonance and Articulation

19
Q

Range that humans can hear sound;

Upper limit may change if ears get damaged

A

Audible Sound:20 Hz to 20,000 Hz

20
Q

below 20 Hz

  • how elephants and
    whales communicate with
    each other for protection,
    attracting mates, and

finding food

A

Infrasonic Sound

21
Q
  • above 20,000 Hz
  • dolphins and bats send
    ultrasonic waves and they can
    detect if there are any obstacles
    based on the time it takes for the

wave to come back
(echolocation)

A

Ultrasonic sound

22
Q

Refers to the highness or lowness of a sound

A

Pitch

23
Q

Intensity of a sound

A

Loudness

24
Q

unit of intensity level for sound

A

Decibel

25
Q

Tone quality

A

Timbre

26
Q

In the 1600s, light is believed to have a stream

of particles (called

A

Corpuscles

27
Q

Newton believed that light behaves like a

A

Particle

28
Q

However, Christian

Huygens proposed that

light behaves like a

A

Wave

29
Q

proves that light is a wave because when it
passes through a narrow opening,

A

Dissfraction

30
Q

came up with a theory
known as the dual nature of light. He concluded
that sometimes light behaves like a particle and
has a wave-like properties in certain situations.

A

Max Planck

31
Q

What type of wave is light:

A

Electromagnetic

32
Q

produce their own light

A

Luminous Objects

33
Q

allow light to pass through them
completely without scattering

A

Transparent Objects:

34
Q

only allow partial or little
amount of light to pass through

A

Translucent Objects:

35
Q

do not allow light to pass
through; forms a shadow

A

Opaque Objects:

36
Q

Light travels fastest in

A

Gas

37
Q

Sound travels fastest in

A

Solid

38
Q

Intensity (brightness) =

A

amplitude

39
Q

The brighter the light,
the ___________ it

has with darkness.

A

more contrast

40
Q

varies as light
carries different
amounts of energy

  • gives light its
    different colors
A

Wavelength

41
Q

Inversely
proportional to
wavelength

A

Frequency

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