Which phrase describes the element carbon-14?
decays at an unknown rate
found in an organism’s remains
forms from the breakdown of nitrogen-14
is measured to determine the age of sedimentary rocks

Often, caries will develop in an area of the tooth that's not readily accessible. which cavity preparation form defines this? a. retention b. resistance c. outline d. convenience

In which situations is the principle of cross-cutting relationship useful in determining relative age?

You and a group of friends are spending your vacation hiking through the mountains. it is cold in the mountains. you will be expending a lot of energy while hiking and you will need plenty of energy to keep you warm. you should pack foods high in to provide the most energy or kilocalories per gram of food. a) carbohydrates b) lipids (fats) c) proteins d) sugars