Layers of sedimentary rock lay in Badlands National Park in South Dakota. The rocks appear red because they contain hematite, which is formed when iron reacts with oxygen. Explain how this event is related to weathering. Be specific.

What are the similarities and differences in the way geologists and biologists approximate the age of the earth? justify your response in two or more complete sentences.

What events caused the united states to intervene in southwest asia?

Which of the following statements best characterizes changes to agriculture in the united states since 1900? a. increased mechanization has reduced the need for labor.b. increased mechanization has increased the need for water, thereby increasing the need for labor.increased mechanization has increased the use of land, thereby increasing the need for labor.d. increased mechanization has increased food production, thereby increasing the need for labor. select the best answer from the choices provided.