Atoms of carbon-14 are radioactive. The decay into atoms of the element nitrogen. Suppose that a sample of rock is taken from a fossil. The sample has 1000 of carbon-14 and 1000 atoms of nitrogen. If carbon-14 has a half-life of 5700 years, how old is the fossil ?

A. 2850 years old
B. 5700 years old
C. 17,100 years old
D. 11,400 years old

Predator instincts is what causes it

The type of rock she find is a sediment rock

By water evaporation from the leaves is created a negative pressure at the top of the tree that promotes the ascension  of the water through channels that are called xylem. there are also two molecule forces that are involved: the intra-water molecules cohesion (water molecules stick to each other) and the adhesion when the water molecules stick to the channels they are running in. this is what enables water to go from the roots to the top of a tall tree.