Geologists obtain indirect evidence about earth’s interior by a. measuring pressure differences at earth’s surface. b. estimating temperature inside earth. c. directly looking under the many layers. d. recording and studying seismic waves. select the best answer from the choices provided

Asolid that forms and separates from a liquid mixture is called

How do dying stars contribute to the formation of planets

The picture represents the process that produces most of the energy used by living organisms on earth. which process is represented in the picture? a) the magnetic attraction between two hydrogen nuclei. b) the fusion of hydrogen nuclei to produce a helium nucleus in the core of the sun. c) the fission of hydrogen nuclei to produce a helium nucleus in the core of the sun. d) the chemical reaction between hydrogen nuclei to produce a helium nucleus in earth's atmosphere.