Answer:
Either (1.) Fossils or (2) Radiometric dating.
Explanation:
Fossils are an obvious answer to this, but radiometric dating is the method most scientists use to find the age of rocks. Radioactive isotopes break down predictably, so the farther along this process is, the older the rock is.
Answer:
diffusion and osmosis
Explanation:
diffusion is the movement of molecules across the membrane from an area of high concentration to an area of low concentration occurring with or without the help of membrane protein. Osmosis is the diffusion of water molecules.
