Below is a drawing of a fossil that is millions of years old. This fossil was just taken out of the ground, and no one knows wha
t kind of organism it is. One way scientists identify a fossil of an animal with bones is to compare the bones of the fossil to the bones of other animals. Do any of these fossil’s bones look like bones of other animals? Describe your thinking.
These fossils looks as if they belong to a whale or a tiger you can tell by the skull structure. but alas look at a hippopotamus skull. they look dangerous.
Solar energy is the original source of energy in most ecosystems. There must be a continual supply, due to energy only flowing in one direction in an ecosystem. Energy that is lost to heat must be replaced by more energy.
