Which is true about physical changes but not chemical changes? a. new substances are sometimes formed b. no new substances are formed c. there is rarely visible evidence of the change d. the change is not easily reversed

Which of these sequences lists the correct order for the creation of sedimentary rock from sediment? a. deposition, burial, compaction, cementation b. burial, deposition, compaction, cementation c. compaction, deposition, burial, cementation d. cementation, deposition, burial, compaction

For ai it's atomic number is 13 and it's mass number is 27 how many neutrons does it have

Electric charge is what ? a. kinetic energy b. radiation c. discovery d. electricity