Which term names traces or remains of organisms that lived in the past? a. adaptations b. mutations c. traits d. fossils

Why is alternating current more effective at long–distance travel than direct current? a. the power lines are made out of conductors. b. transformers increase or decrease voltage as needed. c. the ac generator is more efficient. d. ac has lower voltage than dc.

The discovery of the electron as a subatomic particle was a result of

Convection occurs when thermal energy is transferred by the movement of