If light is blocked by an object and a dark shadow is cast it is

• transparent
• translucent
• opaque
• reflective

If some light passes through but not all and a light shadow is present it is

• transparent
• translucent
• opaque
• reflective

Which answer below names two conditions in which refraction can occur?

• Opaque and transparent 
• Transparent and black  
• Translucent and transparent 
• Translucent and opaque

In this picture, the straw appears to be bent.  This is because – 

• milk is an opaque substance. 
• light is being refracted
• .it is a magic trick
• light is being reflected

What is a lens that is thicker at the edges and thinner in the middle?

• concave lens
• convex lens
• concave lens
• combat lens

A blue pot absorbs all light but ________ light.

• black
• red
• turtle color
• blue 

Sound travels faster through ________ medium.

• less dense
• looser
• denser
• soft shelled

the bending of waves around an obstacle

• diffraction
• defense
• 4-3 cover 2
• reflection

material that transmits almost all of light striking it so that objects can be seen clearly through it

• transparent
• translucent
• transfer case
• opaque

The number of waves that occur in a time interval is referred to as

• amplitude
• crest
• frequency
• speed