Gravity, easy!
Gravity
The Earth is similar to a bar magnet because a magnet holds other magnets or metal objects to it. The same concept goes for the Earth. Gravity from Earth holds all objects down unless another force acts upon it.
Gravity
the gravitational force holds its atmosphere together
Gravity keeps water on Earth. Note that if you consider water is just the liquid substance, this seems obvious, but if you consider it is also a gas (water vapour), which can move away from the surface of the Earth with the air , then it isn't so obvious. Nonetheless, water vapour, the molecule H2O, is still too heavy to escape the Earth's gravitational pull. As a contrast, consider Mars or the Moon, where water will not stay on the surface, and escapes into space, such that there is none left on those bodies. Other gases do escape, such as hydrogren or helium.
It's the mutual forces of gravitational attraction between the Earth and each object.
Gravity
gravity
Gravitational force formed the earth and holds all things on its surface - including us!
The gravitational force between the Earth and the atmosphere holds the atmosphere close, just like it holds you close to the Earth. (ground)
The Earth is similar to a bar magnet because a magnet holds other magnets or metal objects to it. The same concept goes for the Earth. Gravity from Earth holds all objects down unless another force acts upon it.
Weight is a force equal to the product of an object's mass and gravity. Gravity in this context is not a force but an acceleration. Near the Earth's surface, that acceleration is 9.8 m/s², regardless of the mass.
No. Earth's gravity holds us on Earth's surface. It is directed towards the center of the planet. Only powerful engines are strong enough to remove objects, and us, from the surface.
gravity
Gravity!
Gravity
The mutual force of gravitational attraction between the sun and the earth.