Why do geologists think Earth's core contains mostly iron?
A. The entire core is a solid mass.
B. The crust also contains mostly iron.
C. Comets contain more iron than Earth's crust does.
D. Iron is the lightest element.

Now it's your turn to investigate human impact around the world. grab your virtual lab coat and put on your environmental science hat. you will be taking a trip around the globe to explore three locations. at each location, you will investigate the cause and effect relationships of deforestation, desertification, and urbanization. you will also gather evidence of how these factors have impacted the environment over time

Which statement best describes a typical difference that could be found between the “analysis” and “conclusion” sections of a lab report?

Anormal strand of dna is shown below, followed by the same strand of dna after mutations have occurred.