Student 1 claims that energy can only be transferred by particles inside a medium. Student 2 does not agree with Student 1.
Which statement should Student 2 use as evidence that Student 1 is INCORRECT?

• Light energy can travel without a medium.
• Sound energy can travel without a medium.
• All types of energy can travel without a medium.
• Mechanical energy can travel without a medium.

Tags

NGSS.MS-PS3-5

NGSS.MS-PS4-1

Mario shined a flashlight on a mirror in his dark bedroom.  He observes that a spot of light is formed on a wall opposite the mirror.
Which of the following can Mario use to describe this situation.

• absorption
• diffraction
• refraction
• reflection

Tags

NGSS.MS-PS4-2

As children get older, his/her voice changes from higher pitch to lower pitch.  Which of the following BEST explains why this happens?

• Vocal cords get longer and vibrate with a higher frequency.
• Vocal cords get longer and vibrate with a lower frequency.
• Vocal cords get shorter and vibrate with higher frequency.
• Vocal cords get shorter and vibrate with a lower frequency.

Tags

NGSS.HS-PS4-1

What type of wave has the most energy?

• a low-frequency wave
• a high-frequency wave
• a wave length with Hertz
• a wave with a magnetic field

Tags

NGSS.MS-PS4-1

What kind of waves do not require a medium to transport the wave's energy and travel through a vacuum instead.

• mechanical
• sound
• electromagnetic
• seismic

What characteristic do all waves share?

• All waves move matter.
• All waves transfer energy.
• All waves can move through a vacuum.
• All waves travel at 3.0 x 10⁸ m/s.

Tags

NGSS.HS-PS4-5

Loosening the strings of a guitar will cause the pitch to become

• softer
• louder
• lower
• higher

While swimming underwater, Jonathan heard the voices of his friends outside the pool, but he could not understand the words they were speaking.  Which of the following explains this?

• Sound waves increase in frequency when they strike water.
• Sound waves change speed when moving from air to water.
• Sound waves are absorbed by water molecules.
• Sound waves cannot pass through water and are reflected.

Tags

NGSS.MS-PS4-2

Coach Campbell told his students that sound waves are longitudinal waves.  Through which of the following will sound waves NOT travel.

• a balloon
• a lake
• a vacuum
• a door

Tags

NGSS.MS-PS4-2

The human eye could not see the green color of a leaf without

• red light being reflected from the leaf's surface.
• red light being absorbed by the leaf's surface.
• green light being reflected by the leaf's surface.
• green light being refracted by the leaf's surface.

Tags

NGSS.MS-PS4-2