An acid is any chemical compound which when dissolved in water gives a solution with a hydrogen ion activity greater than in pure water.2<span>A </span>base<span> is an aqueous substance that can accept hydrogen ions.</span>
Well fossils can tell you a lot about the age of the rock it was found in, and an index fossil are used to used to define periods of geologic time.
They are essential for autotrophic processes, basically allowing plant life to thrive off of self-made nutrients/food
A molecular clock is a method used by researchers that uses mutation rates in DNA to estimate the length of time that two species have been evolving independently. This provides evidence of evolutionary descent because it can link to common ancestors.
No map can accurately and proportionally represent every country’s size in proportion to another. For example, most maps the USA shows Texas as the largest states, but on a globe, Alaska is by far bigger. Hope this helps!
