science test

Question 1

opaque

Answer 1

can’t see through it

Question 2

transparent

Answer 2

allows light to get though some objects

Question 3

translucent

Answer 3

some light gets though

Question 4

Bio-luminescent

Answer 4

chemical reaction that produces energetic particles that give off visible light from an animal

Question 5

chemiluminescent

Answer 5

chemical reaction that gives off visible light

Question 6

the sun, stars, lighting, and fire are from a

Answer 6

natural light sources

Question 7

light bulbs, flashlights, and tv are from a

Answer 7

artificial light sources

Question 8

electricity, heat, and thermal energy are from a

Answer 8

incandescent light

Question 9

fluorescent

Answer 9

particles emitting light as energy

Question 10

phosphorescent

Answer 10

light energy is absorbed later released as light

Question 11

40-50%

Answer 11

LED

Question 12

light striking a surface and bouncing back

Answer 12

reflection

Question 13

ray that comes from the light source

Answer 13

Incident ray

Question 14

a ray that bounces of the surface

Answer 14

reflected ray

Question 15

a line drawn 90 to the reflecting surface where the incident ray strikes.

Answer 15

normal

Question 16

i angle between incident ray and the normal

Answer 16

angle of incidence i

Question 17

r angle between the normal and the reflected ray

Answer 17

angle of reflection r

Question 18

convex

Answer 18

bulges out like a shiny balloon

Question 19

concave

Answer 19

is curved like the inside of a shiny bowl

Question 20

is the bending of light when it travels from one medium to another

Answer 20

refraction