What type of evidence is needed for a hypothesis to be supported or not supported? O demonstrative evidence
O observational evidence
O physical evidence
O circumstantial evidence

Which of the following is part of the explanation or description of electromagnetic waves? (select all that apply) a. electrically charged molecules in a medium transfer their energy to nearby electrically charged molecules. b. a changing electric field causes a changing magnetic field. c. magnetic molecules in a medium transfer their energy to nearby magnetic molecules. d. a changing magnetic field causes a changing electric field.