Science 8

Front 1

Energy

Back 1

The capacity to apply a force over a distance.

Front 2

Force

Back 2

A push or pull on an object

Front 3

Crest

Back 3

Highest point on a wave.

Front 4

Trough

Back 4

Lowest point on a wave.

Front 5

Wavelength

Back 5

Distance from crest to crest or trough to trough.

Front 6

Amplitude

Back 6

The height of a wave crest or depth of a wave trough, as measured from crest to rest position or trough to rest position.

Front 7

Frequency

Back 7

The number of repetitive motions, or oscillations, that occur in a given time.

Front 8

Hertz

Back 8

Cycles per second.

Front 9

Medium

Back 9

Matter in which a wave travels through.

Front 10

Transverse Wave

Back 10

Matter in the medium moves up and down.

Front 11

Compression Wave

Back 11

Matter in the medium moves back and forth.

Front 12

Wave Model of Light

Back 12

Pictures light traveling as a wave.

Front 13

Light

Back 13

A type of wave that travels through empty space and transfers energy from one place to another.

Front 14

Visible Light

Back 14

A wave that you can see.

Front 15

Refraction

Back 15

The bending or changing direction of a wave as it passes from one material to another.

Front 16

Spectrum

Back 16

A range of frequencies for a given type of radiation.

Front 17

Roy G Biv

Back 17

Red orange yellow Green Blue indigo violet

Front 18

Reflection

Back 18

Occurs when a light wave strikes an object and bounces off.

Front 19

Electromagnetic Radiation

Back 19

The transmission of energy in the form of waves that extend from the longest radio waves to the shortest gamma rays.

Front 20

Radio Waves WLTVL (Wavelengths longer than visible light.)

Back 20

Are a type of radiation the have the longest wavelengths and lowest energy and frequency. Different wavelengths of radio waves have different uses such as radio and tv broadcasting. Microwaves and radar are types of radio waves.

Front 21

Microwaves WLTVL

Back 21

Have the shortest wavelengths and the highest frequency of all the radio waves.

Front 22

Radar WLTVL

Back 22

A type of shorter-wavelength microwave; an acronym for detecting radio and ranging.

Front 23

Infared WLTVL

Back 23

A type of electromagnetic radiation that, relative to light has a longer wavelength and lower energy and frequency.

Front 24

Ultraviolet Waves WSTVL (Wavelengths shorter than visible light)

Back 24

Type of electromagnetic radiation that, relative to light has a shorter wavelength and higher energy and frequency.

Front 25

X rays WSTVL

Back 25

Type of electromagnetic radiation that has a much shorter wavelength and higher energy and frequency than ultraviolet waves

Front 26

Ray model of light

Back 26

A model that represents light as a straight line, or ray, indicating the path of a beam or light.

Front 27

Particle model of light

Back 27

Model that represents light as a stream of fast moving, tiny particles that travel in a straight line to the eye, where they are absorbed to form an image.

Front 28

Transparent

Back 28

Allows light to pass through it freely.

Front 29

Translucent

Back 29

Allows most light to pass through but they are scattered in all directions.

Front 30

Opaque

Back 30

No light passes through.

Front 31

Incident ray

Back 31

The incoming ray.

Front 32

Reflected ray

Back 32

The ray that bounces off the barrier.

Front 33

Normal line

Back 33

Imaginary line that is perpendicular to the boundary between two barriers.

Front 34

Angle of incidence

Back 34

The angle formed by the incident beam and the normal.

Front 35

The angle of reflection

Back 35

The angle formed by the reflected beam and the normal.

Front 36

Law of reflection

Back 36

both the angle of reflection and incidence equal the same thing.

Front 37

Angle of refraction

Back 37

The angle of a ray of light emerging from the boundary between two materials.

Front 38

Plane Mirror

Back 38

A flat mirror producing an image that is the same as the orientation as the object.

Front 39

Concave Mirror

Back 39

A mirror that curves inward the image depends on how far the object is from the mirror.

Front 40

Focal Point

Back 40

Light rays bounce off the surface and come back to meet at the focal point.

Front 41

Coverge

Back 41

Light rays that are coming together.

Front 42

Convex Mirror

Back 42

Mirror that curves outward.

Front 43

Diverging

Back 43

Light rays separating.

Front 44

Lens

Back 44

A curved piece of transparent material.

Front 45

Concave lenses

Back 45

Lenses that are thinner in the center than at the edge. Light rays that pass through diverge. Produces smaller upright images.

Front 46

Convex lenses

Back 46

Lenses that are thicker in the middle that at the edge. Light rays then converge.

Front 47

Focal length

Back 47

The distance from the center of the lens to the focal point.

Front 48

More than two focal lengths

Back 48

smaller inverted image formed.

Front 49

Between one and two focal lengths

Back 49

larger inverted image formed.

Front 50

object at focal point

Back 50

no image

Front 51

less than one focal length

Back 51

larger upright

Front 52

Pupil

Back 52

an opening in the eye that appears dark because because light passes through it without reflecting back.

Front 53

Iris

Back 53

The colored circle of muscle surrounding the pupil.

Front 54

Cornea

Back 54

Covering the iris and pupil is a transparent tissue.

Front 55

Sclera

Back 55

Surrounding the cornea is an opaque tissue.

Front 56

Retina

Back 56

A screen at the back of the eye where an image is formed.

Front 57

Optic Nerve

Back 57

Other cells in the retina convert the light rays into electric signals that are sent to the brain.

Front 58

Rod Cells

Back 58

Help us to see black and white.

Front 59

Cone Cells

Back 59

Help us to see color.

Front 60

Near sighted

Back 60

Cannot bring distant objects into focus.

Front 61

Far sighted

Back 61

Cannot bring near objects into focus.

Front 62

Astigmatism

Back 62

Blurred vision is the end result.