When layered into a single column, which water will sink to the bottom?

a.
cold water with no salt

b.
warm water with no salt

c.
warm, salty water

d.
cold, salty water

Compare and contrast physical changes with chemical changes.

Define dew point. i am writing this part to be able to ask the question

Skills of homo sapiens were found an excavation. the skulls were preserved because the bodies were frozen. so, these fossils are (blank) fossils. the image shows the evolution of skulls beginning 2 to 3 million years ago. based on the image, modern human skulls(blank) ape skulls.