(Question)
Q: The uranium series is a chain constituting one what, which encompass naturally occurring isotopes of the heaviest elements? Choices: - nuclear decay family - gland decay family - fuel decay family - radioactive decay family A:
(Answer)
radioactive decay family

(Question)
Q: What is the term for something left behind by once-living organisms? Choices: - decay - waste matter - deposits - fossils A:
(Answer)
fossils

(Question)
Q: What is transmitted by moving electrons in an electric current? Choices: - potential energy - subsequent energy - stellar energy - electrical energy A:
(Answer)
electrical energy