Pretest

Which are the two type of light sources?

• Artificial and Natural
• Natural and Invented
• Artificial and Not Artificial
• All of them

Which of the following is an examples of artificial source of light?

• 
• 
• 

When light is _____________, it does not pass through or reflect from a material. It remains in the material as another form of energy.

• reflected

• refracted

• absorbed

When light is _____________, it passes from one transparent material to another and changes direction.

• reflected

• refracted

• absorbed

When light strikes a smooth, shiny object like a mirror, the image is _________________________

• reflected

• refracted

• absorbed

When light travels through a magnifying glass, it changes direction and we see a larger view of the object. This is an example of ....

• reflection

• refraction

• absorption

Stan can see the moon at night because the moon

• glows in the dark

• reflects light from the sun

• is very large

• makes its own light

Regulates the amount of light entering the eye and gives the eye its color.

• Iris

• Lens

• Pupil

• Retina

Use the diagram to answer the question.

Which of the following best describes what is being shown in the diagram?

• The light source emits light rays. Light rays are reflected off the flower and enters the eyes through the pupil. We are then able to see the flower.

• The light source emits light rays. Light rays are blocked by the flower and do not enter the eyes. We are then able to see the flower.

• The light source emits light rays. Light rays enter our eyes through the pupil. We are then able to see the flower.

• Our eyes emit light rays. The light rays are reflected off the flower and enter the light source. We are then able to see the flower.

An object that gives off light is called a _________.

• light source

• light ray

• emit

• sparkly