[ 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:
Conjunctions and Commas › ViewSelect the sentence that uses a preposition correctly.
A. The book is on the table.
B. The book is on table.
C. The book is on in the table.
D. The book is on under the table.
Present Continuous Tense › View
We _______ (not go) to the beach today because of the rain.
A. is not going
B. are not going
C. am not going
D. not going
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
