science 2

Question 1

what is energy

Answer 1

anything that causes motion

Question 2

what is displacement

Answer 2

the changing of position in a 3 dimensional space

Question 3

what is wave energy

Answer 3

energy that causes air or particles to become displaced

Question 4

what is the top part of the bump

Answer 4

crest

Question 5

what is the bottom part of the bump

Answer 5

trough

Question 6

what are the circles in the middle

Answer 6

nodes (where the wave crosses the orgin)

Question 7

what are the x’s

Answer 7

anti nodes (crests/troughs)

Question 8

S

Answer 8

speed (meters per second)

Question 9

T

Answer 9

time in seconds (period)

Question 10

weird one

Answer 10

wave length (m)

Question 11

what is wavelength

Answer 11

the distance between the two crests, used to determine speed

Question 12

what is frequency

Answer 12

the number of crests in a given amount of time

Question 13

what is period

Answer 13

the time it takes to complete a full wave cycle, measured in seconds

Question 14

what is a mechanical wave

Answer 14

waves that require a medium to transfer their energy

Question 15

what is a medium

Answer 15

a medium is any matter that will allow a wave to travel

Question 16

name the two mechanical waves

Answer 16

transverse and longitudinal

Question 17

what is a transverse wave

Answer 17

a medium that moves up and down, but the energy moves side to side (energy moves perpendicular to each other)

Question 18

examples of a transverse wave

Answer 18

earthquakes, some properties of light, flicking a rope

Question 19

what is a longitudinal wave

Answer 19

a medium moves side to side, and energy moves side by side (energy and medium move parrellel to each other)

Question 20

examples of a longitudinal wave

Answer 20

sound waves and a slinky

Question 21

what is the doppler effect

Answer 21

when an object making a sound is coming toward someone who is a stationary observer, this sound appears to be a higher frequency, when an object is going away from a stationary observer, the frequency seems to drop (the wave is being pushed the same was it is projecting)

Question 22

how is the speed of sound determined

Answer 22

the tempature of the medium, and the medium itself

Question 23

transonic

transonic

Answer 23

mach 1.0

Question 24

supersonic

Answer 24

mach 1.0

Question 25

hypersonic

Answer 25

mach 5.0

Question 26

subsonic

Answer 26

mach 1.0

Question 27

what is the speed of sound

Answer 27

340 m/s

Question 28

what is resonance

Answer 28

the natural frequency at which a solid object vibrates

Question 29

what is an electromagnetic spectrum

Answer 29

a wave that is not dependent on a medium contains particles called protons light is an example of an electromagnetic wave

Question 30

radio

Answer 30

size: building wave length: 10 3 frequency 10 4

Question 31

microwave

Answer 31

size: people wavelength: 10 -2 frequency: 10 8

Question 32

infrared

Answer 32

size: ant wavelength: 10 -5 frequency: 10 12

Question 33

visible

Answer 33

size: pinpoint wavelength: .5 times 10 -6 frequency: 10 15

Question 34

ultraviolet

Answer 34

size: bacteria wavelength: 10 -8 frequency: 10 16

Question 35

x - ray

Answer 35

size: molecules wavelength: 10 -10 frequncy: 10 18

Question 36

gamma ray

Answer 36

size: atoms wavelength: 10 -2 frequency: 10 20

Question 37

visible light

Answer 37

travels in electromagnetic waves also travels in tiny energy packets cslled photons aplitude represents brightness wavelength represents color the speed of light in a cacuum is 300,000,000 m/s

Question 38

how does light travel

Answer 38

light travels in a straight line through a single medium light will bend as it moves through a medium

Question 39

refraction

Answer 39

when waves speed up of slow down due to traaveling in a different medium (object apears to bend)

Question 40

reflection

Answer 40

is when light hits a medium and bounces back at the same speed (creates mirror image)

Question 41

absorbtion

Answer 41

light gets absorbed (black shirt) energy goes into the medium

Question 42

diffraction

Answer 42

the bending of light around a medium whenever a light enters a prism, it always bends toward the base)