Gravity is caused by mass. Everything causes gravity but the bigger it is and more mass it has the more pull is felt by its gravity. So you are pulling the earth towards you and the earth is pulling you. The earth is much bigger and has more mass, so it pulls much more. Gravity gets weaker the further away you get from its source.
The earths crust does not have the same mass all over, so some areas have slightly less gravity than others. The differences between areas are very very small.
The moon has only a quarter the mass of the earth, so gravity on the moon is a quarter of earths gravity.
Not sure what you mean by "change gravity"; a nebula has mass, therefore it exerts a gravitational force.
weight
No, gravity does not change throughout the day. It remains constant, exerting a consistent force on objects.
No, it gives you weight. Mass does not change in the presence of gravity.
Weight. The force of weight experienced by an object can change when the acceleration due to gravity changes. Weight is directly proportional to the acceleration due to gravity, so an increase or decrease in gravity will result in a corresponding change in weight.
no
As compared to Earth, you mean? If an object doesn't change its shape, the center of mass doesn't depend on gravity - and the center of gravity hardly does so.
A situation where gravity causes a change in velocity is when an object is dropped from a height. As the object falls, gravity acts on it, causing it to accelerate towards the ground. The change in velocity happens because gravity exerts a constant force on the object, causing it to increase its speed over time.
Yes. Weight is directly proportional to the force of gravity.
the air pressure is different where if the gravity substances were to change it will be normal
No, acceleration due to gravity does not change the weight of an object. Weight is determined by the mass of the object and the acceleration due to gravity in that location. The acceleration due to gravity affects the force with which an object is pulled toward the center of the Earth, leading to its weight.
no =)