Air has mass, and gravity pulls anything with mass. The gravity of the earth "pulls" air down towards it's center.
No, it's the other way around: atmosphere needs gravity to stay on a planet. Artificially, pressurized compartments can maintain atmosphere though. Such is the case on the International Space Station.
The Earth has an atmosphere because it has the gravity necessary to keep the gases from floating off into space. The more mass a planet has, the more gravity it has, and the more gravity it has, the thicker an atmosphere it can sustain.
Earth has gravity which creates a gravitational pull, allowing it to hold water on its surface. The force of gravity is strong enough to keep water molecules from floating off into space, ensuring that water remains on Earth's surface. Additionally, the planet's atmosphere helps maintain suitable conditions for water to exist in its liquid form.
Gravity hold the atmosphere to the Earth. But other factors do cause earth to loose some atmosphere to space continuously.
Earth is able to retain its atmosphere due to its gravity. The gravitational force of Earth is strong enough to hold on to the gases of the atmosphere, preventing them from escaping into space. This creates a stable environment that allows for life to exist on the planet.
Jupiter
Earth & Venus.
The planets orbit the Sun because of the force of gravity that keeps them there. Without gravity they would all move in straight lines.
Gravity holds the atmosphere around the planet. Gravity is the force that attracts a body toward the center of the planet. For most purposes Newton's laws of gravity apply, with minor modifications to take the general theory of relativity into account.
The gravitational force between the planet and the sun is what holds the planet in orbit around the sun. This force keeps the planet moving in a curved path around the sun, in balance with the planet's inertia.
Mars' surface pressure is around 0.7 kPa, around 0.7% of Earths surface pressure. The planet has a smaller mass and lower surface gravity than Earth, so it can only hold a thin atmosphere.
Saturn's gravity is about 10.4 m/s² at its surface, which is slightly weaker than Earth's gravity. This means that objects on Saturn would weigh slightly less than on Earth. Additionally, Saturn's gravity is strong enough to hold its rings and moons in orbit around the planet.
The gravity of a planet does not hold it in place, nor does any planet stay still. The planets are in constant motion as they orbit the sun.
gravity and temperature; It needs gravity so it can hold its atmosphere.
the bigger the planet the more gravity it has because it needs to hold it self together so it has more gravity than smaller planets who require a small amount of gravity to hold themselves toghther
Jupiter has enough gravity to hold on to most gases because it is the largest planet in our solar system. Its strong gravitational pull prevents gases from escaping into space, allowing it to maintain its thick atmosphere.
All objects with mass have gravity, so all planets have gravity. However, the strength of gravity depends on the mass of the planet. Earth's gravity is strong enough to hold objects to its surface, which is why we feel it as weight.