(7th grade question) (urgent!) Sediment is formed through what process?

A cooling and crystallization
B extreme pressure and heat
C melting
D weathering

Last week i was assigned a thematic. we have groups of three but the people i was assigned with haven't been in school for days. i would appreciate if anyone can me with my thematic . i highlighted most of the important steps and i circled my thematic topic. in desperate need : ( its due on february 19

Which equation is used to calculate the magnetic force on a charge moving in a magnetic field

What kind of bond is created by the attraction between atomic particles of opposite charge? ionic bond hydrogen bond covalent bond nuclear bond