All the uranium in the core and mantle to decay to the point it could not keep their convection cells in motion and the core and mantle froze solid. But don't worry that will take longer than the 6 billion years we have before the sun expands to a red giant and envelops the earth, burning it up.
the orbit
Earthquakes are a common natural disaster that occur on tectonic plate boundaries. The movement of tectonic plates along faults can cause sudden release of energy, resulting in violent shaking of the Earth's surface.
No, plate tectonics would not work with a solid rock mantle. The movement of tectonic plates is driven by the flow of semi-fluid rock in the mantle. If the mantle were solid, there would be insufficient convection currents to drive plate movement.
The length of a day would increase and the number days in a year would decrease.
The days would be longer
plate movement and plate tectonics
the orbit
Earthquakes are a common natural disaster that occur on tectonic plate boundaries. The movement of tectonic plates along faults can cause sudden release of energy, resulting in violent shaking of the Earth's surface.
Along plate edges is where a lot of earthquakes occur. If you were to live along a plate boundary you would be putting yourself in danger of an earthquake.
No, plate tectonics would not work with a solid rock mantle. The movement of tectonic plates is driven by the flow of semi-fluid rock in the mantle. If the mantle were solid, there would be insufficient convection currents to drive plate movement.
The movement of continents due to plate tectonics would occur over the longest amount of time, taking millions of years for significant changes to happen. This process is responsible for the drift and collision of continental plates, leading to the formation of mountains and ocean basins.
The length of a day would increase and the number days in a year would decrease.
The days would be longer
If the movement of the plates brought all the continents together again, a single continent would form. At the moment plate movements are not heading in that direction.
Without plate movements on Mars, earthquakes and volcanic activity would not occur like they do on Earth. The lack of plate tectonics also means that Mars does not have the same kind of geological processes shaping its surface, such as mountain building or the creation of deep ocean basins. Additionally, without plate movements, Mars does not experience the recycling of materials through subduction zones like on Earth.
Days and nights would be twice as long.
The movement along plate boundaries would cause an earth quake, a tsanami, or either the building of a mountain.