Soil & Rocks
This soil layer contains less organic material and more minerals than topsoil.
What is subsoil?
The main agent of chemical weathering.
What is water?
The phase of the moon between first quarter and full moon.
What is waxing gibbous?
Living factors in an ecosystem are called these. The non-living factors are called these.
What are biotic factors?
What are abiotic factors?
The shallow underwater plain bordering continents.
What is the continental shelf?
This sedimentary rock contains rough, angular fragments.
What is breccia?
The temperature at which air becomes saturated.
What is the dew point?
A star that suddenly becomes much brighter.
What is a nova?
This process splits large atomic nuclei into smaller nuclei.
What is nuclear fission?
This type of volcano has broad, gentle slopes and fluid lava.
What is a shield volcano?
This sedimentary rock is made mostly of calcite.
What is limestone?
This atmospheric layer reflects radio waves back to Earth.
What is the ionosphere?
The point directly overhead on the celestial sphere.
What is the zenith?
This alcohol fuel is made from corn or grains.
What is ethanol?
This autonomous underwater vehicle operates without outside guidance.
What is an AUV?
These scratches in rock are caused by glaciers moving over Earth’s surface.
What are striae?
The first visible sign that a tornado may be forming.
What is a wall cloud?
This effect causes light from stars moving toward Earth to shift blue.
What is blueshift?
This concept means using resources responsibly while preserving them for future generations.
What is sustainable development?
This fault occurs when rocks move horizontally.
What is a strike-slip fault?
This blue gemstone is corundum with traces of iron or titanium.
What is sapphire?
This instrument measures wind speed.
What is an anemometer?
The technique of combining radio telescope signals to improve resolution.
What is interferometry?
These compounds are the primary cause of ozone depletion.
What are CFCs (chlorofluorocarbons)?
Natural ridges along rivers formed from deposited sediment.
What are natural levees?