While on a paleontological dig, you discover a trilobite fossil in a layer of sedimentary rock.

Approximately how long ago did the layer of rock
form? Explain how you reached your conclusion.

The is a particle with one unit of positive charge a. proton b. positron c. electron d. nucleus awnser quick it is a important science test!

The diagram shows the relationship between scientific disciplines.the names of some scientific disciplines have been removed from the boxes. which scientific discipline belongs in the blue box? a.physics b.biology c.chemistry d.metallurgy

Can someone me out on this question for my national 5 chemistry homework