Earthquakes and volcanoes are most likely found in which locations? 

• at plate boundaries
• in oceans
• in the middle of continents
• in the middle of plates

Transform boundaries are most likely to produce what phenomenon?

• volcanoes
• deep sea trenches
• underwater mountain ranges
• earthquakes

What drives tectonic plate movement? 

• gravity
• coriolis effect
• convection currents
• the earth's magnetic core

According to Wegener's hypothesis of continental drift, 

• Earth's surface is made up of seven major landmasses
• the continents DO NOT move
• Earth is slowly cooling and shrinking
• the continents were once joined together in a single landmass

Most geologists rejected Alfred Wegener's idea of continental drift because...

• it did not agree with their current theory
• Wegener was interested in what Earth was like millions of years ago
• Wegener used several different types of evidence to support his hypothesis
• Wegener could not identify the force that moved the continents

In Seafloor Spreading, molten material rises from the mantle and erupts or flows out 

• along the edges of all the continents
• along mid-ocean ridges
• in the deep ocean trenches
• in the north and south poles

Over the past 200 years, the level of carbon dioxide in the atmosphere has

• decreased slightly
• increased until recently, and then decreased
• increased steadily
• stayed about the same

This prevents damaging ultraviolet radiation from the sun from reaching the earth.

• Stratosphere
• Hemisphere
• Ozone Layer
• Ionosphere

Which is a natural source of greenhouse gases?

• aerosols
• deforestation
• volcanic eruptions
• burning fossil fuels

What do greenhouse gases do?

• absorb Earth's outgoing infrared radiation
• reflect Earth's incoming infrared radiation
• magnify ultraviolet radiation in the atmosphere
• block the Sun's infrared radiation