science 8 chapter 2 unit test

Question 1

Cameras are used

Answer 1

To take a visual record of something

Question 2

Lasers are

Answer 2

Intense beams of focused lifhty

Question 3

Fiber optics are glass tubes wich

Answer 3

Carry light signals

Question 4

A microscope uses

Answer 4

Two convex lens

Question 5

A refracting telescope uses

Answer 5

Two objective lens

Question 6

The reflecting telescope uses

Answer 6

One concave mirror one plane mirror and one convex lens

Question 7

The retina is where

Answer 7

The image is formed

Question 8

The cornea

Answer 8

Protects the eye

Question 9

The iris

Answer 9

Controls the amount of light entering the eye

Question 10

The sclera

Answer 10

Holds the eye together

Question 11

The cc’d

Answer 11

Changes light toe electricity

Question 12

Light passes through the

Answer 12

Cornea getting mostly focused

Question 13

A concave lens diverges light no foclal point

Question 14

AA convex lens has

Answer 14

A focal point

Question 15

Light passing into a new medium will

Answer 15

Refract

Question 16

Waves order are

Answer 16

Radio waves
microwaves
Infrared waves
Visible light
Ultraviolet waves
X rays
Gamma rays

Question 17

The are two types of waves

Answer 17

Normal one transverse other one compression