The predominant gas in the Earth's atmosphere is

a.

Helium

b.

Oxygen

c.

Methane

d.

Water vapor

e.

Nitrogen

How do the mechanisms of plate motion influence geological features

Which of the following is a possible consequence of ozone layer depletion on living organisms a. increased exposure to ground-level ozoneb. decreased levels of ultraviolet radiation in the tropospherec.

What are the two main driving forces of the rock cycle? O A. Heat and density O B. Plate tectonics and water O C. Cleavage and fracture O D. Lahars and sand dunes

Which is generated by movements of tectonic plates? A. seismic waves B. earth's magnetic field C. ocean currents D. volcanoes

Which example BEST shows the global impact of the internet? A. An American writer uses the internet to conduct research for a report. B. A Chilean reporter shares live footage of an earthquake on the Web. C.

Choose the state and capital that border the east coast of the United States.

Trees in deciduous forest do what? A. Shed leaves during one season B. Grow in a warm Mediterranean climate C. Have needlelike leaves D. Grow in a climate that is cold year round

How many miles long is the great wall of china

What landforms are created at convergent boundaries?

In which direction does the Sun appear to move across the sky? Ofrom west to east from east to west from north to south from south to north