Semester 2 Virtual Cumulative Exam (Waves)

Which best describes what happens when light rays move from air, through the lens, and back to air?

• The light rays refract toward a central axis.

• The light rays spread apart as they exit the lens.

• The light rays converge toward a single point.

• The light rays diverge before entering the lens.

Tags

NGSS.MS-PS4-2

Hamid is viewing an image of a bird produced by a set of concave lenses. What must be true about the image?

• It is a virtual image.

• It is upside down

• It is larger than the actual bird.

• It is capable of being projected.

Rosa writes a story in which the main character turns into a mouse. Which object could she include in her story so the character can see his own face and confirm he has really turned into a mouse?

• an ironed bedsheet

• a polished spoon

• a flat sheet of paper

• a painted cabinet door

A convex mirror is placed to the right of an object. The image formed by the mirror will be a

• real image that appears to be on the right of the mirror.

• real image that appears to be on the left of the mirror.

• virtual image that appears to be on the right of the mirror.

• virtual image that appears to be on the left of the mirror.

Which is one characteristic shared by electromagnetic and mechanical waves?

• Both have a crest and a trough.

• Both move due to particles bumping into each other.

• Both are formed by charged particles.

• Both occur as a result of a disturbance.

Which object reflects light with the longest wavelength?

• a violet flower

• a green leaf

• a yellow book

• a blue paper

Tags

NGSS.MS-PS4-2

Which types of electromagnetic waves have frequencies that are higher than those of ultraviolet light but lower than those of gamma rays?

• microwaves

• X-rays

• infrared light

• radio waves

Which type of electromagnetic waves make up the colors of a rainbow seen after a storm?

• infrared light

• ultraviolet light

• X-rays

• visible light

Which sound is most likely the most intense?

• a whisper

• a rock concert

• normal speech

• the sound of rain

Which sound would most likely have the lowest pitch?

• a bird chirping

• a vacuum-cleaner running

• a lawn mower running

• a dog barking