PS4-2 task five quiz

What makes electromagnetic waves different from other kinds of waves?

• They have very short wavelengths.

• They can travel through solids, liquids and gasses.

• They are the only kind of waves that don't need matter to move.

• They do not transfer energy.

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

When a sound wave passes from air into water, what happens to the speed of its transmission?

• The speed increases.

• The speed decreases.

• There is no change.

• The wave changes direction.

Tags

NGSS.MS-PS4-2

Which wave example is carrying the most energy?

• The top wave

• There is no way to tell

• The bottom wave

• The amplitudes are the same

Tags

NGSS.MS-PS4-1

Why would the amplitude of an echo be lower than the original sound?

• Wave interference cancels part of the wave out.

• The frequency of the echo increases as it bounces off the surface causing the echo.

• Part of the energy carried by the sound is transferred into whatever surface it struck

• Wave interference increases the amount of energy carried by the echo.

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

Stealth technology makes an aircraft invisible to radar because...

• The aircraft flies higher than the radar can reach.

• The surface of the aircraft absorbs the radar signal so it doesn't return its origin.

• The aircraft reflects the radar signal away from its origin.

• Radar waves are sound waves and stealth aircraft fly faster than the speed of sound.

Tags

NGSS.HS-PS4-3

NGSS.HS-PS4-5

A blue painted surface is seen as blue because...

• The pigment in the paint is the color blue.

• Blue is the only wavelength of light that is absorbed by the paint pigment.

• It is easier to see the blue wavelengths of light compared to the other wavelengths.

• Blue is the only wavelength that is reflected off of the painted surface.

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

How is an oscilloscope able to display a sound wave?

• The energy in the sound wave is transformed to an electric signal, which is visible on the oscilloscope screen.

• Sound waves transfer their energy into the oscilloscope.

• Sound waves travel through wire inside the oscilloscope and appear on the screen.

• The oscilloscope increases the amplitude of the sound wave to the point where it can be seen.

Tags

NGSS.MS-PS4-1

Why do you see lightning before you hear the clap of thunder that accompanies the lightning?

• Thunder happens after lightning strikes.

• Light waves travel at a faster speed than sound waves.

• Thunder is a sound wave and needs to travel through particles to reach a person's ears.

• Lightning is energy but thunder is just sound.

Radio waves can be detected from objects in outer space. How can this be true? Select two correct answers.

• Space aliens communicate through radio technology.

• Radio waves are electromagnetic waves and can travel through the vacuum of space.

• Sound waves transform into radio waves when they leave the surface of a planet or star.

• Radio waves are released by any object that releases energy.

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-3

Why do you think that some kinds of sunglasses are both tinted and reflective?

• Reflective surfaces transmit less energy and dark surfaces absorb energy instead of transmitting it.

• Reflective surfaces are more effective in bright light and tinted surfaces work better in darker, cloudy situations.

• Reflective and tinted surfaces absorb more wavelengths of light than either surface would alone.

• Reflective surfaces are better at concealing a person's eyes than tinted lenses.

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2