Increasingly detailed models of Earth’s interior demand more accurate measurements of density, sound velocity, and melting temperature of earth materials at relevant conditions, whereas the fast-past discovery of super-Earths challenges experimentalists to expand the pressure-temperature range to probe material properties under extreme conditions. A combination of static and dynamic compression data allows us not only to improve the accuracy of data but also to expand pressures over terapascal. Here I present new measurements of density, melting, and sound velocity of iron alloys and mantle silicate by static and dynamic compression methods. The results will be discussed in the content of our current understanding of the composition of the Earth’s core and the internal structure of super-Earths.