Maps & Boundaries
What line divides Earth into Northern and Southern Hemispheres?
Equator
What is the most abundant gas in Earth’s atmosphere?
Nitrogen
What human activity causes the most soil erosion?
Deforestation
What is our galaxy called?
Milky Way
What is the point directly above an earthquake’s focus?
Epicenter
What line divides East and West Hemispheres?
Prime Meridian
What sphere of Earth contains life?
Biosphere
What can farmers do to reduce erosion?
Plant cover crops or rotate crops
What type of galaxy is it?
Spiral
What natural event forms folded mountains?
Convergent boundary compression
What boundary divides the crust into tectonic sections?
Plate boundary
What causes day and night?
Earth’s rotation
How does mining affect the environment?
Removes vegetation and causes pollution
What are collections of billions of stars called?
Galaxies
What type of plate interaction forms volcanic arcs?
Oceanic-continental subduction
What is the name for a map line connecting equal points of elevation?
Contour line
What layer of the atmosphere contains weather?
Troposphere
What does clear-cutting do to the lithosphere?
Increases erosion
What event began the universe?
Big Bang
What type of stress causes faults to slide past each other?
Shearing
What type of boundary recycles crust into the mantle?
Subduction zone
What is the approximate age of Earth?
4.6 billion years
What energy source reduces carbon emissions?
Solar or wind energy
What evidence supports expansion?
Redshift of light
How do volcanic eruptions affect global temperature?
Ash blocks sunlight, cooling climate