What's the hypothesis in the two sentences?​

Which is a chemical property of iron? a. it forms iron oxide (rust) when exposed to moisture and air. b. it is a gray–black metal that is hard to the touch. c. it has a melting point of 2795°f (1536°c). d. it is a good conductor of heat

Use the table to identify the phase and phase changes of the elements under the given conditions. write the name of the substance, phase, or phase change

In what environment would mineral formation caused by high pressures and high temperatures most likely occur?