Usually but it depends which mountain
Any mountain much higher than that would crush, due to its own weight.
because more stress would be exerted on the bottom of the mountain hence leading it to crush
Is 1.0 half or more than a kilometer
Objects which height is less than 2000 are hills and objects which height is more than 2000 feet are mountains so mountains are higher.
Yes - 1 kilometer is 1,000 meters.
Although there is no universal size limit, oceanographers call such a submerged mountain a "seamount." Many features will have names similar to non-nautical mountains, such as massif and ridge.
Mile
The best measure to use is the meter. A kilometer would be well beyond the height of a desk or house.
Meters are used. So far, even the tallest building is less than a kilometer high.
No because 1,000 meters = 1 kilometer
A mountain is taller than a hill. A hill must attain a certain height to be considered a mountain. This height requirement varies from culture to culture. There is no standardized height or a world-wide definition for the word "mountain".
Olympus Mons is substantially taller than Mt. Everest by any standard of measurement (height above datum, height above surrounding plains, height above lowest surface point).