Reviewing the Standards ( morning work )

Which of these illustrates that sound waves can travel through a liquid?

• Voices can be heard as people speak to one another

• Whales and porpoises signal each other by making sounds

• Astronauts can’t hear each other in space unless they use a radio

• Footsteps can be heard through the ceiling as someone walks on the roof

Collars that emit radio waves are sometimes placed on animals to find their location. Which is the BEST reason for using radio waves as a method of tracking the animals?

• Radio waves are invisible

• Radio waves have a high frequency

• Radio waves spread in all directions.

• Radio waves have the shortest wavelength.

Which characteristic is common to both sound and light waves?

• They transfer energy
• They are transverse
• They can travel through a vacuum
• They are longitudinal

Using a remote control, you can show that electromagnetic radiation _____________________

• diffracts and accelerates in air
• is a longitudinal wave
• possesses energy inversely proportional to its frequency
• transfers energy without transferring mass

A spoon is placed in a beaker of water. When observed from the side it appears bent. This phenomenon is due to ____________.

• Dispersion
• Refraction
• Reflection
• Diffraction

What kind of image is produced by a plane mirror?

• Virtual and upright
• Real and upright
• Real and inverted
• Virtual and inverted

Light rays are refracted by a lens. Which of the following allows the two rays to form a real image?

• totally reflected inside the lens
• converge to a single point
• travel parallel to each other
• diverge

Which of the following waves in the electromagnetic spectrum has the highest energy?

• Radio Waves
• Ultraviolet Rays
• xrays
• Infrared Waves

As wavelength decreases in the electromagnetic spectrum the frequency _____. 

• decreases
• stays the same
• increases
• doubles

The following is a picture of what type of mirror? 

• Convex Mirror
• Concave Mirror
• Plane Mirror
• Flat Mirror