What is the definition of endothermic and exothermic? pls help on a timer will give brainlist

It is advised not to hold the thermometer by the bulb while reading it

Difference between natural and artifical magnet

Scientists discovered fossils in several layers of the earth you see here. they found fossils of algae, snails, and clams in layer d. given that information, where do you think they found fossil evidence of simple land plants and amphibians?