Plants
Physics explains how rose petals get their iconic shape
Scientists thought they knew what was behind rose petals’ geometry. They were wrong.
By Sarah Wells
HS-PS2-5
Plan and conduct an investigation to provide evidence that an electric current can produce a magnetic field and that a changing magnetic field can produce an electric current.
More Stories in HS-PS2-5
- Space
Spacecraft need an extra boost to travel between stars
Star Wars makes space travel look easy by breaking the laws of physics. Off-screen, the technology for spacecraft to reach other worlds doesn’t exist yet.
- Materials Science
Scientists Say: Superconductor
At cold enough temperatures, these materials can conduct electricity with no resistance.
- Materials Science
A bit of electricity can glue hard metals to soft materials
Using this method to stick and unstick metals from soft materials could one day create new types of batteries.
- Tech
Magnetic fields melt and re-form new shape-shifting devices
Miniature machines made of gallium and magnetic particles can switch from solid to liquid and back.
- Physics
Scientists Say: Magnetism
Magnetism is an aspect of one of the four fundamental forces of nature: electromagnetism.
- Agriculture
Native Amazonians make rich soils — and ancient people may have too
Modern Amazonians make nutrient-rich soil from ash, food scraps and burns. The soil strongly resembles ancient “dark earth” found in the region.
- Earth
Scientists Say: Pole
A pole is either of two opposite ends of a molecule, magnet, battery, planet or other object.
- Physics
Scientists Say: Force
When an object experiences a force, its change in motion — or acceleration — depends on its mass.
- Physics
Staying grounded in space requires artificial gravity
On TV, people in space walk around like they’re on Earth. How can science give real astronauts artificial gravity? Spin right round, baby.
