EMS Review

Parallel rays of light hit a surface, bounce off, and scatter the rays at different angles.  Which of the following is this an example of? 

• reflection

• refraction

Tags

NGSS.MS-PS4-2

Which of the following is an accurate statement about the electromagnetic spectrum?

• Longer wavelengths with lower frequencies make up the visible light spectrum.

• The portion of the spectrum that we can see is called the infrared spectrum.

• There are a number of tools that allow us to communicate and create images using the spectrum.

Our eyes detect light that lies only within a small region of the electromagnetic spectrum. This region is called visible light. Which of these statements describes the visible spectrum of light as seen by the human eye?

• The lowest frequency appears red, and the highest frequency appears violet.

• The lowest frequency appears green, and the highest frequency appears red.

• The lowest frequency appears blue, and the highest frequency appears orange.

Electromagnetic radiation from the sun comes in all forms. Scientists have found ways to use the electromagnetic waves to study different characteristics of objects in space.

Which of the following correctly pairs an electromagnetic wave with a way that it is used in space exploration?

• Radio waves are used to evaluate the motion of planets throughout our Solar System.

• Visible light waves are used to evaluate the temperature of planets throughout our Solar System.

• Infrared waves are used to evaluate the mountain heights of planets throughout our Solar System.

• Gamma rays are used to evaluate the thickness of atmospheres of planets throughout our Solar System.

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

You see lightning before you hear thunder because:

• light waves can travel through a vacuum.

• sound waves cannot travel through the air.

• light waves travel faster than sound waves.

• sound waves travel faster than light waves.

A class took a field trip to a music studio. The students watched through thick glass as the musicians played music inside the studio. The students could only hear the music when the studio door was open.  The glass separating the musicians from the students is made with two layers of thick glass. The space between the glass layers has had all the air removed, creating a vacuum. 

Which statement best explains why the students were able to see the musicians even while they were unable to hear them?

• The frequency of light is much greater than the frequency of sound.

• Light travels through glass while sound does not.

• Sound requires matter to travel through, while light does not.

Red light waves and yellow light waves travel through air and strike the surface of glass. Only the yellow light waves travel through the glass as shown in the figure below. Which of these phrases best describes the glass?

• reflects red light (red light bounces off)

• opaque for yellow light (blocks yellow light)

• transparent for yellow light (lets yellow light through)

• translucent for red light (lets red light through)

Tags

NGSS.MS-PS4-2

Which phase of matter would transmit light waves the fastest, and why?

• The solid would transmit the fastest because the particles are closest together.

• The liquid would transmit the fastest because the particles are the most freely moving.

• The gas would transmit the fastest because there are the fewest particles to interfere with the waves.

Tags

NGSS.MS-PS4-2

Sound travels fastest through:

• empty space

• cool water

• warm air

• a metal spoon

Tags

NGSS.MS-PS4-2

Imagine a scientist detects an electromagnetic wave with a higher frequency than that of gamma-ray waves. The scientist calls these waves' delta rays. Which of these statements would be true of delta rays?

• Delta rays would travel slower than gamma rays.

• Delta rays would have more energy than gamma rays do.

• Delta rays would have the same wavelength as gamma rays.

• Delta rays would have a longer wavelength than gamma rays have.

Tags

NGSS.HS-PS4-1