13. If a fossil originally had 456 g of radium which had a half-life 3 years. How many half-lives would have occurred when there was only 7.1 g of radium left? How old is the
fossil? Fill out the parent/daughter table to help

In attempt to solve the working problems created by the industrial revolution, the united states and many countries in europe considered and/or adopted

Match the type of adaptation to the correct example, structural adaptation functional adaptation behavioral adaptation example type of adaptation elephants live in herds to protect their young leaves of a rain forest plant species have a pointed tip that enables rainwater to drain off easily. camels have nostrils that they can close snakes produce venom to kill prey and defend themselves. earthworms coil when touched, as part of a defense mechanism. human skin darkens with increased exposure to sunlight.

Fossils can only be formed when? if mud, silt or tar is in the area to preserve the fossil ierosion does not occur and allows the fossil to form oxygen and microorganisms cannot decay the bones the area is dry and does not contain mud or silt