Scientists use meteorites that hit earth to provide evidence of the composition of earth’s interior because they hypothesize that

meteorites are made of the same material as peridotite and lava
meteorites are made of the original material from which earth formed
meteorites have the same p and s wave speeds as rock samples
meteorites contain a smaller percentage of iron than earth’s crust

Use your vocabulary words to complete the sentences below. more of the world's population is now concentrated in heavily populated urban areas known as a this is quite a contrast from the past when or native groups were either farmers or — hunters and gatherers who moved between places in search of food. advanced technology has led to the integration of world economics and cultures, in the world's more developed countries. this integration requires , the responsible use and management of natural resources.

What major factors play a role in global warming? 1. human activity and normal climate conditions 2. natural factors and human activity 3. normal climate conditions and abnormal human activities 4. abnormal human activities and natural factors

What first caused people to consider that the continents were once one large landmass?