Discovering New Worlds
If a moon is further away from the planet its orbiting, its orbital velocity is what?
Slower
Due to human impact, and an increase of carbon in the atmosphere, the carbon cycle is what?
Unbalanced
The name of the plate boundary where crust is pulled apart is what?
Divergent boundary
This solution to natural hazards involves greenery on top of buildings.
Green roofs
What is the name of the event that introduced oxygen to our atmosphere?
Oxygen Revolution
The Doppler redshift theory proves the universe is currently what?
Expanding
The melting of glaciers brings freshwater to the Arctic Ocean, which decreases what in the water?
Salinity
Subduction zones occur at this type of plate boundary.
Convergent
This is a type of energy source that will not run out.
Renewable
The gas that was added to the atmosphere because of photosynthetic organisms is what?
Oxygen
If a star is moving away from earth, its spectrum is what?
Redshifted
The name of the process plants use to make food, which affects the amount of carbon dioxide in the atmosphere, is what?
Photosynthesis
This describes the cycling of magma within Earth's interior as it cools and heats up.
Convection currents
Coal is this type of energy source.
Nonrenewable
Billions of years ago, oxygen escaped from this Earth system into the atmosphere.
Hydrosphere
As distance from an orbiting body increases, gravitational forces what?
Decrease
When the effect is amplifying the cause, such as glaciers melting leading to rising sea levels which causes more glaciers to melt, it is an example of what?
Positive feedback
This plate boundary involves two plates rubbing against each other horizontally.
Transform
This describes a metropolitan area that is significantly hotter than its surrounding regions.
Urban heat island
The property of Earth that makes liquid water possible is what?
Distance from the sun
This law describes whether an orbital period will increase or decrease depending on the distance from an orbiting body.
Kepler's Third Law
An increase of carbon from this Earth system has caused the carbon cycle to become unbalanced.
Geosphere
At mid-ocean ridges, magma rises and forms what in the ocean?
New crust
This energy source is expensive to build, but it is very cost-effective and cheap to maintain compared to coal.
Nuclear
The name of the photosynthetic bacteria that first introduced oxygen to our planet is what?
Cyanobacteria