EM Spectrum EOU Assignment

Directions:

• Complete the paper End-of-Unit assignment that was passed out on Friday, April 4

• Use the Quizizz lesson to check and correct your paper assignment

  • Make sure that you used the correct code for your block, and that you typed your first and last name for your username

• Submit a screenshot of your highest Quizizz score

  • Your Quizizz score will be the grade for this assignment

  • You may complete the assignment more that once. Your screenshot score, after verified, will be your entered in the gradebook

Review: Scientific Inquiry Review

• independent variable (IV) - factor changed (cambiado) by the scientist (cientifico) 

• dependent variable (DV) - factor observed and measured (medido) 

• control - you COMPARE (COMPARAS) the results (resultados) to this variable or group  

• constants (constantes) - the factors that must stay the same (deben permanecer igual) 

Students investigated how visible light is reflected and absorbed by different colors.
For their experiment, they filled four beakers with water. Then they wrapped four breakers with paper; each wrapped in different colored. The students placed the beakers outside on a sunny day.

​The Experiment

Multiple Choice

Select the independent variable (IV).

• the liquid in the beaker

• the color of the paper

• the final temperature of the water

• a beaker without paper

Multiple Select

Select two constants.

• the liquid in the beaker

• the color of the paper

• the final temperature of the water

• size of the beakers

Multiple Choice

What should the students use for a control?

• a beaker with apple jouce

• a smaller beaker

• a beaker without paper

Match

Analyze the data from the experiment.

• highest temperature (59.4^oC) - absorbed the most energy

• second highest temperature (52.7^oC)

• lowest temperature (29.6^oC) - reflected the most energy

• second lowest temperature (33.1^oC)

breaker covered in black paper

beaker covered in blue paper

beaker covered in white paper

beaker covered in yellow paper

• breaker covered in black paper

• beaker covered in blue paper

• beaker covered in white paper

• beaker covered in yellow paper

Open Ended

Share how could you apply this experiment to your life.

Check & Correct: EOU Assignment

Multiple Choice

#1 A scientist is conducting investigations with electromagnetic waves that have the highest frequency and shortest wavelength. What kind of waves is the scientist studying?

• UV

• Gamma

• Visible

• Radio

Multiple Choice

#2 color of visible light that has the highest frequency

• red

• yellow

• blue

• violet

Multiple Choice

#3 Light waves can do all of the following except be

• transmitted

• compressed

• reflected

• absorbed

Multiple Choice

#4 A convex mirror spreads light rays and produces an image that is

• upright and smaller

• upright and magnified

• inverted and smaller

• inverted and magnified

Multiple Choice

#5 What happens when sunlight hits a black object?

• All wavelengths of visible light are absorbed.

• All wavelengths of visible light are reflected.

• Only one visible light wavelength, black, is reflected.

Multiple Choice

#6 Which diagram shows the refraction of light as it enters water from the air?

Open Ended

#7 Explain refraction in your own words.

Multiple Choice

#8 color of visible light that has the least energy

• Red

• Blue

• Violet

• Yellow

Multiple Choice

#9 Why does a ball on a playground look green?

• It is absorbing all light wavelengths except green.

• It is reflecting all light wavelengths except green.

Multiple Select

#10 Select all the statements that accurately describe electromagnetic radiation.

• travels in a straight path

• travels in longitudinal waves

• travels faster than sound

• travels in transverse waves

• travels slower than sound

Multiple Choice

#11 When a white light was shined at a prism, a rainbow appeared on the other side.

• It is only composed of red and violet.

• It cannot bend then separate into different wavelengths.

• It is actually composed of all the colors of the rainbow.

• It is created by a prism.

Multiple Choice

#12 A student used technology to discover that X-rays pass a specific point in a given amount of time more often than microwaves pass a specific point in a given amount of time. Based on the data, the student can conclude that

• X-rays have a higher amplitude than microwaves

• microwaves have the same wavelengths as X-rays

• microwaves reflect more radiant energy than X-rays

• X-rays have a higher frequency than microwaves

Dropdown

#13 Visible light is best absorbed by ​

Select answer

and best reflected by ​

Select answer

.

Multiple Choice

#14 visible light wave (color) that has the shortest wavelength

• red

• green

• indigo

• violet

Multiple Choice

#15 visible light wave (color) that has highest energy

• red

• green

• indigo

• violet

Multiple Choice

#16 Which electromagnetic radiation is highly dangerous, but is used in the medical field to treat cancer?

• Radio waves

• Ultraviolet waves

• Infrared waves

• Gamma waves

Multiple Choice

#17 On the electromagnetic spectrum, which waves have a lower frequency than infrared waves and are used by Doppler radar to track severe weather?

• Ultraviolet waves

• Gamma rays

• Microwaves

• X-rays

Multiple Choice

#18 What do cameras, telescopes, binoculars, and microscopes use to change the path of light rays and produce a specific type of image?

• use mirrors to refract visible light rays

• use lenses to refract visible light rays

• use lenses to reflect visible light rays

Multiple Choice

#19 What energy transformation most commonly occurs when the Sun gives off energy which is converted after it is absorbed by matter?

• Nuclear → Radiant → Thermal

• Thermal → Nuclear → Radiant

Multiple Choice

#20 the electromagnetic wave that has the lowest-energy wave

• visible light

• infrared

• microwave

• radio

Match

#21 Radiant energy travels in straight lines until it strikes an object. Match the diagrams to the correct wave behavior.

Transmission

Reflection

Absorption

• Transmission

• Reflection

• Absorption

Multiple Choice

#22 A person close to a make-up mirror sees an upright, larger reflection. However, a person far from the mirror sees an inverted, smaller reflection. What type of mirror is a make-up mirror?

• concave mirror

• convex mirror

Multiple Choice

#23 How does visible light bend as it enters a lens?

• toward the thinnest part of the lens

• directly at the middle of the lens

• toward the thickest part of the lens

Multiple Choice

#24 When a bird tries to catch a fish that is swimming in the water, what must the bird account for?

• reflection of the Sun can cause a bending of light

• refraction can occur at surfaces between the air and water

• all light travels in straight lines through all materials

Multiple Choice

#25 In the PhET simulation titled Bending Light, students can observe how light refracts when shone through different substances. Select the answer best explains why the angle of refraction changes.

• the frequency of light changes when it enters a different medium 

• the speed of light changes when it enters a different medium

• the type of wave changes when it enters a different medium

Multiple Choice

#26 Which is NOT an example of how infrared radiation is used?

• During the COVID 19 pandemic, body temperatures were checked often using thermometers aimed at foreheads that detect heat.

• Signals are sent between the television and the remote control to change the channel.

• Night vision goggles help soldiers see in the dark.

• Air traffic controllers depend on Doppler radar to keep planes safe.

Multiple Select

#27 Select all the correct answers that describe concave lenses.

• forms a small, upright image

• forms a small invert image

• a magnifying glass is an example

• a door peephole is an example

Extra Review: Mirrors and Lenses

​The next set of slides and questions are an extra review of mirrors and lenses.

Please review and study your completed and corrected End-of-Unit assignment to prepare for your test.

MIRRORS
Mirrors REFLECT visible light rays to form an image.

reflect = bounce back

Multiple Choice

According to the law of reflection the angle of incidence is ____________ the angle of reflection.

• less than

• greater than

• equal to

Multiple Choice

Convex mirrors cause light to spread out, and form an image that is

• upright and smaller

• inverted and magnified

Multiple Choice

The bowl (inside) of a shiny spoon is similar to a ____ mirror.

• convex

• concave

• plane

Multiple Choice

The bowl (inside) of a shiny spoon can form a

• real image

• smaller, inverted image

• smaller, upright image

Multiple Choice

Type of mirror used as a side mirror on a vehicle to provide a wide angle view and more for the surroundings

• Plane

• Convex

• Concave

Multiple Choice

type of mirror found in a bathroom, which produces an upright, life-sized image

• Plane

• Convex

• Concave

LENSES

Lenses REFRACT visible light rays to form an image.

refract = bend

Multiple Choice

____ are thick in the middle and thin at the edges.

• Convex lenses

• Concave lenses

Multiple Choice

Concave lenses form small, upright images, because

• the light rays diverge - are spread in many directions

• the light rays converge - focus to a single point

Multiple Choice

In a microscope, the convex lens produces an image that is

• inverted (upside down)

• upright

Multiple Choice

Which of the following does not refract light?

• prism
• convex lens
• concave lens
• mirror

Multiple Choice

The concave lens of a telescope produces images of far-away objects by ____ light rays.

• bending (refracting)

• absorbing
• reflecting

Multiple Choice

Why are the angles of refraction different when light travels through different media?

• light changes frequency as it travels through different substances

• light changes speed as it travels through different substance

• light changes a different type of wave as it travels through different substances

Multiple Choice

Which model best represents a concave lens?

​Next Steps:

• Complete the lesson again, if you are not please with your score

• Submit a screenshot of your highest score

• Study for your test, using your packet and your paper EOU assignment