2nd 9 weeks Final Study guide

What is a question they could you the teacher to determine if a wave is electromagnetic or mechanical?

• What is the wavelength of the wave?
• Can the wave travel through a solid, liquid, and gas?
• Does the wave speed increase or decrease as it moves from a solid to a liquid?
• What is the amplitude of the wave?

Tags

NGSS.MS-PS4-2

If the observer is stationary and the plane accelerates constantly from point A to D and the engine produces a constant sound during this trip, at which point will the observer hear the highest frequency?

• a
• b
• c
• d

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

Two students are standing along a sidewalk and observe a passing firetruck with its siren blaring. Which statement is correct?

• Observer B will hear a higher pitch sound because the wavelength is larger.
• Obersver B will hear a lower pitch sound because the wavelength is larger.
• Observer A will hear a higher pitch sound because the wavelength is larger.
• Observer A will hear a lower pitch sound because the wavelength is smaller.

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

Which type of wave must the teacher be describing and why? 1. The wave travels fastest through air 2.The wave has an amplitude of 2nm 3. The wave is self-propogating

• Electromagnetic wave because it has a very high speed and can travel using electric and magnetic fields
• Electromagnetic wave because it has a low amplitude
• Mechanical wave because it has a very high speed and is traveling through air; EM waves cannot travel through air.
• Mechanical wave because it has a low amplitude

Tags

NGSS.MS-PS4-1

/the drawing below shows a person sitting on a sofa in front of a fireplace. Which of the following are the primary modes of heat transfer from the fire in the fireplace to the person?

• radiation and convection
• radiation and condensation
• convection and conduction
• conduction and condensation

Much of the heat producted by a fireplace is carried up the chimney by rising air. Which of the following processes is responsible for this loss of heat energy to the outside environment?

• conduction
• convection
• evaporation
• radiation

The graph below compares three states of a substance. Which of the following choices is the best label for the y-axis?

• molecular density
• molecular motion
• molecular size
• molecular conductivity

Tags

NGSS.MS-PS1-4

This table shows the specific heat of four substances. If each substance is exposed to the same amount of energy for one minute, which substance will get the hottest?

• lead
• iron
• glass
• ice

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

The graph below represents a substance being heated from -30oC to 110oC. If 50 kJ of heat are removed from the substance when it is at 50oC, what will be the state and temperature of the substance?

• gas at 70oC
• gas at 0oC
• liquid at 100oC
• liquid at 10oC

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

The primary reason an ice cube feels cold to the touch is that

• conduction causes coldness to leave the ice
• radiation from the hand enters the ice
• conduction causes heat to leave the hand
• convecation currents leave the hand