Earth's core is made up of mostly what?

a.) silicate materials

b.) magnesium and iron

c.) iron and nickel

d.) light elements like hydrogen

What is the force that causes the Earth's lithospheric plates to move? is it a. convection currents. b. strikestripfault c. continental drift d. magnetism

Which action occurs at diverrgent plate boundaries? a - metamorphic rock formation b - seafloor spreading c - mountain building d - rock strata formation

19. Which of the following groups represents a nation without a state? Kurds Israelis Turks Germans Albanians

13. A questionnaire about movie preferences asks if you would rather watch a boring documentary or an exciting action movie?

The government of which of the following as covered in this unit is the best example of unitary system? A) athens B) united states C) united kingdom D) sparta

How high does the earth's atmosphere extend? A. 100 m B. 1,000 m C. 10 km D. 100km

How to grow plants in space?

Based on this map of oil imports, which nation imported the greatest number of oil barrels each day in the years before 2006? A. China B. Australia C. Canada D. the United States

How far will a P-wave travel in 9 min 20 sec?

The land in Mexico City is sinking. What is the primary cause of this problem? A. deforestation caused by cutting down trees B. too much water being taken from underground aquifers C. too many offices and towers being built in the city D.