Chapter 3 - Chapter Checkup

Front 1

does not let light pass through

Back 1

opaque

Front 2

clear; allows light to pass through

Back 2

transparent

Front 3

allows light to pass through, but scatters the light

Back 3

translucent

Front 4

able to produce its own light

Back 4

luminous

Front 5

the bouncing back of light

Back 5

reflection

Front 6

a two-sided piece of transparent material with one or both sides curved

Back 6

lens

Front 7

a lens that is thicker at the edges than in the middle, making things look smaller

Back 7

concave lens

Front 8

a lens that is thicker in the middle than at the edges, making things look larger

Back 8

covex lens

Front 9

to gather together in one place

Back 9

focus

Front 10

the bending of light rays as they enter a new material

Back 10

refraction

Front 11

a transparent object that separates the colors in white light by bending them at different angles

Back 11

prism

Front 12

the series of colored bands created when sunlight is separated

Back 12

spectrum

Front 13

invisible light beyond the red end of the spectrum; heats the object it strikes

Back 13

infrared light

Front 14

the light-sensitive lining at the back of the eyeball

Back 14

retina

Front 15

the opening in the iris through which light enters the eye

Back 15

pupil

Front 16

the colored part of the eye that surrounds the pupil and regulates its size

Back 16

iris

Front 17

the transparent, outer layer at the front of the eyeball

Back 17

cornea

Front 18

an extra layer of cells behind the retina of many nocturnal animals

Back 18

tapetum

Front 19

Light naturally travels around corners. T/F

Back 19

false

Front 20

Shadows are made when light is blocked by an object. T/F

Back 20

true

Front 21

Translucent materials allow you to see light but not objects through them. T/F

Back 21

true

Front 22

A microscope is used to make far away objects seem closer. T/F

Back 22

false

Front 23

A telescope is used to make small objects seem larger. T/F

Back 23

false

Front 24

Mirrors are used in periscopes to enable their users to see around corners. T/F

Back 24

true

Front 25

Nearsighted people need lenses that are convex. T/F

Back 25

false

Front 26

Ultraviolet light causes tanning or sunburn. T/F

Back 26

true

Front 27

Insects use their compound eyes to detect movement in any direction. T/F

Back 27

true

Front 28

An animal with binocular vision can see two images at the same time. T/F

Back 28

false

Front 29

Who is the Creator of all light?

Back 29

God

Front 30

What travels faster than anything else scientists can measure?

Back 30

light

Front 31

What is the speed of light?

Back 31

186,000 miles per second

Front 32

What do we call the luminous objects we see in God's creation?

Back 32

natural lights

Front 33

Why do leaves look green?

Back 33

They absorb all other colors in light and reflect green.

Front 34

What is the ability to do work?

Back 34

energy

Front 35

Which mirror focuses light rays, causing the reflected oject to look bigger?

Back 35

concave mirror

Front 36

Who invented the incandescent light bulb?

Back 36

Thomas Edison

Front 37

Who discovered tht white light is a mixture of colored light?

Back 37

Sir Isaac Newton

Front 38

Which mirror scatters light rays, causing the reflected object to look smaller?

Back 38

convex mirror

Front 39

Why do you see the flash of lightning before you hear the clap of thunder?

Back 39

because light travels faster than sound

Front 40

If you shine a flashlight into the night sky, how fast will its light travel?

Back 40

approximately 186,000 miles per second

Front 41

Why can you see a red-colored light coming from the heating element of an operating toaster?

Back 41

The element gives off light because it is very hot.

Front 42

Why can't you see your face in a chalkboard?

Back 42

The chalkboard is not a good reflector because it has a dull, rough surface.