What do both the Senate and the House of Representatives require of people running for election? They must be at least 30 years old.
They must be a resident of a US state.
They must have experience in state government.
They must have lived in the US as a citizen for 10 years.

Which of the following areas has the highest population density?

What volcanoes form on a divergent plate margin

1. crust 1 the metallic layer at the earth's center 2. inner core 3 the firm layer between the crust and the asthenosphere 3. lower mantle 2 the layer surrounding the inner core 4. asthenosphere 4 the semi-solid layer between the top layer and the upper mantle 5. upper mantle 5 the layer between the asthenosphere and lower mantle 6. top layer 6 the earth's outermost layer 7. outer core 7 the hottest part of the mantle