MS-PS4-2
Develop and use a model to describe that waves are reflected, absorbed, or transmitted through various materials.
- Animals
Is it possible to be invisible?
Fiction is full of characters with the power to vanish. But some animals have real-life ways to become nearly invisible.
- Fossils
Here’s why ammolite gems have a rainbow shimmer
The fossils’ fabulous colors arise from delicate assemblies of crystal plates.
- Materials Science
Scientists Say: Tenebrescence
Under ultraviolet light, some minerals adopt long-lasting new hues.
- Humans
Scientists Say: Chronohygiene
Artificial lights and other aspects of modern life can confuse our body’s internal sleep clock. But a few minor changes may grant us much-needed control.
- Physics
Here’s how to levitate something without magic
Levitation may seem like fantasy. But all it takes is a little physics — and sound waves, magnetism or electricity.
- Animals
Rudolph’s red nose could glow through bioluminescence
Simple chemistry could give the reindeer his iconic red snout. But physics would make it look different colors to anyone who spied Rudolph from the ground.
- Physics
Scientists Say: Blue whirl
Four types of smaller flames create the perfect firestorm of elegantly efficient combustion.
- Physics
This microphone picks up sounds by watching them
This microphone can “hear” by viewing the tiny vibrations made in everyday objects as sound waves strike them.
- Psychology
Listening to slightly different sounds in each ear may boost focus, teen finds
While “binaural beats” may boost attention, his research shows video game music is distracting.
- Space
Scientists caught a black hole ringing like a bell
Two black holes merged, creating a new, bigger one. This event triggered the clearest ripples in spacetime ever observed.
- Physics
How polarized and UV-blocking sunglasses protect our eyes
Their filters can cut glare to help us see more clearly. The best ones also filter out the sun’s UV rays — even on cloudy days — to limit eye damage.
- Physics
Much of the sun’s light is green. Why does it look yellow?
Sunlight's peak intensity is at a green wavelength. Here’s why it doesn’t appear that way to us.
