[ Vocabulary ]
__________ is a technique in which scientists calculate the age of a sample based on the amount of remaining radioactive isotopes it contains
A. isotope dating
B. retroactive dating
C. radioactive dating
D. index fossilization

Random Topics:
Gerund or InfinitivesAbstract NounsFuture Tense - will and going toWill and Going toCompliment, Congratulation, and HopeRelative Pronouns with PrepositionsSimple Present and Past TensesFormal & Informal WordsNouns as AdjectivesSimple and Progressive Verb TensesOther quiz:
Past Modals › ViewDavid is in jail. He _________ robbed a bank.
A. should have
B. shouldn’t have
Conjunction › View
I think you shouldn’t go to the party ______it’s raining heavily
A. Because
B. But
C. Already
D. For
Homonyms › ViewHe had no food, the poor ___.
a. retch
b. wretch
Vocabulary › View
Agreement between two or more sides in which each side gives up some of what it wants.
A. compromise
B. cabinet
C. bicameral
D. amendment
