No force makes the Earth move. It has enough momentum to continue moving through space.
None. The Earth remains the same size because it does not lose or add material (except for meteorites, which are negligable. Tectonic forces move the -parts- of the Earth around, moving the water out of the way as needed, but nothing is added to or taken from the Earth's size.
Earth's gravity forces the moon into an orbit
Gravity and Inertia
Nitrogen levels and surface radiation.
"Balanced forces" doesn't mean that an object doesn't move. "Balanced forces" means that the vector sum of forces on an object is zero. Now, according to Newton's First Law, if no force is acting on an object, if that object is at rest it will continue being at rest; if it is moving, it will continue moving with the same velocity. In other words, there will be no CHANGE in velocity; that doesn't mean that the velocity must necessarily be zero.
An object has a general tendency to keep moving - that's how our Universe works. No force is required to keep an object moving - unless there is another force that slows it down. Here on Earth, there are usually frictional forces that slow objects down, and therefore a force is required to counteract the frictional forces.
To keep moving in a straight line. This is rather hard to show because the gravitational pull of the Earth is hard to escape without a rocket.
gravity
That's true. Plus ... even if the forces on an object are BALANCED, it can keep moving forever.
None. The Earth remains the same size because it does not lose or add material (except for meteorites, which are negligable. Tectonic forces move the -parts- of the Earth around, moving the water out of the way as needed, but nothing is added to or taken from the Earth's size.
As long as the forces remain the same or do not change direction
slow moving plate tectonics
Earth's gravity forces the moon into an orbit
If something is moving, no force is required for that something to continue moving. That doesn't mean there are no forces acting on Earth; for example, the Sun attracts Earth towards it. But that's not what keeps the Earth moving.
No, inertia is trying to keep the moon moving in a straight line, which would be away from Earth. Gravity is pulling the moon towards Earth. The result when these two forces are combined is the moon maintaining a constant orbit of Earth.
If an object is moving, no force is required to keep it moving. Forces are required to CHANGE its motion, for example, to speed it up, or to slow it down.
Because your legs keep moving