which statement does NOT describe the differences between Mechanical and ElectroMagnetic waves?


Mechanical waves must have a medium while EM waves do not


Mechanical waves form a spectrum while EM waves do not


Mechanical waves are longitudinal while EM waves are transverse


Both mechanical and EM waves experience reflection, refraction and absorbtion

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When a black brick is placed directly into the sun, its temperature rises. The rise in temp is BEST described by which statement?

Question 4 options:

the weight of the brick increases over time


mass from the sun is transferred into the brick as heat


the Sun exerts a magnetic force on the brick


energy from the sun is transferred by waves and absorbed by the brick
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A single beam of light is shown into a glass containing milky water. When the beam hits the glass it takes a sharp turn downward. Which statement BEST describes why the beam took the sharp turn downward?

Question 3 options:

the light is moving from air into another medium


the farther light is from the source, the slower it moves


the force of gravity affects the light


the milk blocks the passage of light into the water
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Collars that emit radio waves are sometimes placed on animals to find their location. Which is the best reason for using a radio wave to track these animals?

Question 2 options:

radio waves spread in all directions


radio waves have a high frequency


radio waves are created by the animals


radio waves are visible
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Radio waves can broadcast their signals over great distances. Which property allows a radio station signal to travel far from the source?

Question 1 options:

collision between air molecules


oscillations between the magnetic field of earth


flow of electrons through anteneas


generation of electromagnetic waves