Which statement best describes an index fossil?
a. a fossil that can be used to establish the absolute age of a rock layer
b. a fossil which is formed in a soft sediment by the movement of an animal
c. a fossil of an insect captured in amber
d. a fossil of an animal captured in ice

C3h8o3 - glycerol major species present when dissolved in water

Use the periodic table to complete this equation that represents nuclear fission processesun - ba c 3 n

Alidded glass container is filled with a colored gas. after a period of time, it is observed that the gas is uniformly spread throughout the box and that the movement has slowed considerably. next, a warm iron plate is carefully placed under the box. why is there resumed movement of the gas in the container?