Space
Scientists Say: Spacetime
Weaving together the concepts of space and time allows scientists to understand gravity and more.
HS-PS2-4
Use mathematical representations of Newton's Law of Gravitation and Coulomb's Law to describe and predict the gravitational and electrostatic forces between objects.
More Stories in HS-PS2-4
- Plants
Magnets mimic gravity’s guiding hand for plants growing in space
Without constant gravity, plants waste energy twisting and coiling, trying to reach toward the sun. Teen ISEF finalists might have found a solution.
- Physics
Eyelashes help fling water from our eyes
The “micro-ratchet” structure and curvature of eyelashes could help keep eyes clear of rain, sweat and tears.
- Earth
It’s electric! Long-sought new field found in Earth’s atmosphere
This ambipolar electric field is weak. Yet it’s still strong enough to control the evolution of Earth’s upper atmosphere — and maybe life as we know it.
- Physics
Forests could help detect ‘ghost particles’ from space
If trees could act as natural antennas, one physicist proposes that they just might pick up signals of hard-to-spot ultra-high energy neutrinos.
- Physics
Scientists Say: Force
When an object experiences a force, its change in motion — or acceleration — depends on its mass.
- Environment
Explainer: Gravity and microgravity
The force of gravity holds us on the ground, keeps planets in orbit and extends throughout space. A very weak gravitational pull is called microgravity.
- 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.
- Physics
This high-tech sweeper is designed for super-clingy moon dust
An electron beam is the newest tool being developed to remove sticky and damaging lunar dust from surfaces.
- Physics
How physics lets a toy boat float upside down
Buoyancy’s upward force keeps objects afloat even in unusual conditions.
