In order to ascertain useful dates on rock units to determine the age of major events. your mission is to date what is thought to be a very old fossil with a volcanic ash layer immediately above the fossil. we do know the fossil is at least more than 300 million years old. should we use carbon 14 to date the fossil, or uranium 238 to date the volcanic ash layer, and why?

What does a particular point on a line of a phase diagram represent? o a. the maximum temperature a substance can exist at without bonds breaking b. the pressure created by the kinetic energy of molecules at a particular temperature c. the melting point or boiling point of a substance at a specific pressure d. the conditions in which temperature and pressure have equal effects on a substance

Drag each label to the correct location on the chart. classify each reaction as endothermic or exothermic.

When water dissociates, each water molecule splits into a hydroxide ion and a) h 3 o + b) a hydrogen atom c) a hydrogen ion d) h 2 o e) oh —