Do you think united states should take control of the rest of North America? ? Why

What are economic systems and how do they differ?

Marine exptoration of oil uses seismic waves to locate oil in the seabed. what is a negative impact from seismic waves on the aquatic ecosystem of the ocean? a.seismic waves kill microoganisms b.seismic waves disrupts the sand and causes seafloor erosion c.seismic waves have virtually no adverse affects on marine life d.seismic waves damage the sonar that dolphins and whales use to orient themselves underwater

In 150-200 words, name three advancements made by the egyptians and tell how they impacted the culture.