Where did most of the heat of the Earth come from at its formation? A Seismic waves
B Radioactive decay
C Planetesimals crashing into each other
D peridotite xenoliths

Aperson who uses a computer at a desk does not have to worry about safety in the workplace. true or false

Regarding most of the narrator’s story, which word best describes the tone?

Ascientist is conducting an investigation that involves water, silver, carbon dioxide, and oxygen gas which group of statements best describes all of the materials he is using in the investigation?