Magma, if underground, and Lava, if above the ground
Mercury is the only metal that is a liquid at room temperature, despite it's high density.
At room temperature, water is in a liquid state because it has a high boiling point, as compared to gases that have relatively low boiling points.
Of course not,it is not liquid.IT is in gas state
All metals can be made liquid if they reach a high enough temperature. Mercury is the only metal to be liquid at STP and room temperature though; the others require much higher temperatures.
Liquid silver is worth the same amount as solid silver. This is not its natural state, and it would have be kept at an extremely high temperature to remain liquid.
By keeping it at an extremely low temperature (−183 °C) or at an extremely high pressure
Gold melts at a temperature of 1064 degrees Celsius (1947 degrees Fahrenheit), turning into a liquid state. This process is known as melting. Once the temperature decreases, gold solidifies back into a solid form.
No , a high temperature high pressure ( gas )
Calcium is typically a solid at room temperature, though it can be melted to a liquid state with enough heat. It exists as a gas at very high temperatures.
When a liquid is heated, its temperature increases causing the particles within the liquid to move more quickly. Eventually, if the temperature is high enough, the liquid may reach its boiling point and transition into a gas state through the process of vaporization.
(I suppose that you mean supercritical state of fluid.)Supercritical state of liquid-gas is a state that liquid state and gas state stop to exist at particular temperature and pressure.There is only just fluid state which has both liquid and gas property and if you change the pressure or temperature just a bit, it will change to one of the state.How to achieve supercritical state ?The supercritical state is done at HIGH TEMPERATURE and PRESSURE.For example, the famous CO2 fluid (used to separate caffeine from the coffee bean) is acquired at 304.1 Kelvin and 72.8 atm.
To make oxygen a liquid, it must be cooled to a temperature below its critical temperature of -118.57 degrees Celsius and be subjected to high pressure. This will cause the oxygen molecules to come close together and transition from a gas to a liquid state.