| Radioactive dating | Used by scientists to estimate ages of rocks, fossils and the earth; contrary to misconception, it is not used to date rocks at millions of years old. |
| Radioisotope dating | Primary dating method scientists use for determining the age of the earth |
| Radioactive decay | Some isotopes of certain elements are unstable; they can spontaneously change into another kind of atom. |
| Radiohalos | Result from physical damage caused by radioactive decay of uranium and intermediate daughter atoms of polonium |
| RATE group | Radioisotopes and the Age of The Earth; investigated the assumptions made in standard radioisotope dating practices |
| Recolonization Theory | Theory by some creationists in UK and Europe that fossil record is a record not of catastrophe but of processes during recolonization. |
| Red in tooth and claw | Features that animals possess to kill prey or defend themselves |
| Relative morality | There is no God to whom we have to give an account. |
| Ruin-reconstruction | Another name for Gap Theory |
| Robert Plot | Made the first discovery in 1677 of what later were called dinosaurs |
| Richard Owen | Coined the term “dinosaur” from Greek words meaning “terrible lizard.” |
| Exercises
created by Atty. Gerry T. Galacio. You
can freely use these exercises, but you must not upload them to any website
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gtgalacio@yahoo.com
Exercises created with freeware Hot Potatoes v. 6.3 from the University of Victoria in British Columbia, Canada.
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