Science Unit B Ch. 4

What color is sunlight?

• blue

• white

• yellow

• black

The only kind of energy waves you can see are

• radio waves

• x rays

• microwaves

• light waves

Laser beams are more powerful than regular light because

• all laser waves have the same wavelength

• they have the same wavelength as x rays

• they are all red

• they can travel long distances with out getting dim

The red flower is red because

• it reflects every color of light except red

• it absorbs every color of light except red

• it is opaque

• it is translucent

You cannot see a reflection in a rough surface because rough surfaces

• are always opaque

• reflect light rays in a single direction

• scatter the light rays that hit them

• produced curved reflections, like funhouse mirrors

The lenses inside your eyes are

• convex

• concave

• opaque

• asymmetrical

Light bends when it

• moves from one material into another

• changes wavelength

• changes from one color to another

• becomes absorbed

Why are some sounds louder than others?

• They have faster vibrations.

• They result from slower vibrations.

• They are noise, not music.

• They are made with more energy.

In what ways are all sounds alike?

• All are pleasant to hear.

• All can be heard by humans.

• All are cause by vibrations.

• All travel through empty space.

Which of these materials would sound travel the fastest?

• air

• water

• salt water

• soft wood