Question

name: _____________________ period: ___
em spectrum stations – student guide
instructions: rotate through all 6 stations. at each one, read the prompt, complete the short task, and record your
answers in the space provided. use your senses, think critically, and observe carefully!
station 1: ultraviolet (uv) – hidden light
task: use the uv flashlight to shine on the object in the jar. notice how it glows under uv light.
prompt: what do you see when the uv light hits the object? why do scientists use uv light to study things we can’t see
with our eyes? consider the prompt questions above - your notes:

station 2: infrared (ir) – heat vision
task: use the kitchen thermometer to test the temperature of different objects (your hand, desk, cold water, book).
prompt: which object was warmest? which was coolest? why is infrared helpful in space exploration?
consider the prompt questions above - your notes:

station 3: radio waves – tuning in
task: use the radio to test fm, am, and static stations. listen to how the sound changes.
prompt: which station had the clearest sound? which traveled farthest? why are radio waves useful for space
communication? consider the prompt questions above - your notes:

station 4: microwaves – heating up – out of order

station 5: infrared remote – invisible beam
task: press a remote control while watching the front of it through a camera screen (teacher - assisted)
prompt: what do you notice on the camera that you can’t see with your eyes? why might scientists use infrared in space
tools? consider the prompt questions above - your notes:

station 6: visible light – split the sun
task: use a prism outside to break sunlight into a rainbow. use white paper to catch the colors.
prompt: what colors do you see? which one bends the most? what can star color tell us about a star’s temperature?
consider the prompt questions above - your notes:

Answer:

To answer the questions for each station, we analyze the tasks and prompts:

Station 1: Ultraviolet (UV) - Hidden Light

• Task: Shine UV light on an object in a jar.
• Prompt Questions:
• What do you see when UV light hits the object?

Expected Observation: The object may glow (fluoresce) with colors like blue, purple, or green, depending on the object (e.g., certain dyes, minerals, or security markings).

• Why use UV to study invisible things?

UV light reveals properties (e.g., fluorescence, contaminants) not visible to the naked eye, helping identify materials, detect counterfeits, or study biological samples (e.g., DNA, proteins).

Station 2: Infrared (IR) - Heat Vision

• Task: Measure temperatures of objects (hand, desk, cold water, book) with a kitchen thermometer.
• Prompt Questions:
• Which object was warmest? Coolest?

Expected Observation: Your hand (warmest, due to body heat), cold water (coolest, due to its low temperature).

• Why is infrared helpful in space exploration?

IR detects heat (thermal radiation) from celestial bodies, even in dark environments, helping map temperatures of planets, stars, or dust clouds.

Station 3: Radio Waves - Tuning In

• Task: Test FM, AM, and static radio stations.
• Prompt Questions:
• Which station had the clearest sound? Farthest?

Expected Observation: FM stations often have clearer sound (higher fidelity), while AM stations can travel farther (better at long-range/through obstacles).

• Why are radio waves useful for space communication?

Radio waves have long wavelengths, so they travel long distances with little attenuation, making them ideal for transmitting data between Earth and space probes.

Station 5: Infrared Remote - Invisible Beam

• Task: Press a remote control while viewing it through a camera screen.
• Prompt Questions:
• What do you notice on the camera?

Expected Observation: A flashing light (IR beam) from the remote, invisible to the naked eye but visible on camera (which detects IR).

• Why use infrared in space tools?

IR tools detect heat signatures of celestial objects, map thermal environments, or communicate (e.g., remote controls for spacecraft) without visible light interference.

Station 6: Visible Light - Split the Sun

• Task: Use a prism to split sunlight into a rainbow.
• Prompt Questions:
• What colors do you see? Which bends the most?

Expected Observation: Colors of the rainbow (red, orange, yellow, green, blue, indigo, violet). Violet bends the most (shortest wavelength), red the least (longest wavelength).

• What can star color tell us about temperature?

Cooler stars appear red, warmer stars appear blue-white (e.g., red dwarfs are ~3,000–4,000 K; blue giants are ~10,000+ K).

Station 4: Microwaves - Heating Up (Out of Order)

No task is active, but microwaves are used for heating (e.g., food) and communication (e.g., radar, satellite links) due to their ability to transfer energy or carry data.

Final Notes (Example Structure)

Station	Observation/Answer
Station 2	Hand (warmest), cold water (coolest); IR detects heat in space.
Station 3	FM (clearest), AM (farthest); Radio waves travel long distances.
Station 5	Flashing IR light on camera; IR detects heat/maps environments in space.
Station 6	Rainbow (ROYGBIV); Violet bends most; Star color indicates temperature (red = cool, blue = hot).

These observations and explanations align with the properties of electromagnetic waves (UV, IR, radio, visible light) and their applications in science/exploration.