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A scarce oxygen molecule in which 3 oxygen atoms are bonded together.
Ozone
Most common form of precipitation.
Rain
The true brightness of a star.
Absolute Magnitude
Amount of water vapor in the air.
Humidity
Layered balls of ice that form in strong thunderstorms; most common in spring and summer.
Hail
The distance from the sun to Proxima Centauri
4.2 Light Years
Vertical movements of air are called__.
Updrafts or Downdrafts
This cloud produces lightning, thunder, and heavy rain.
Cumulonimbus
When a meteorological drought affects an area's groundwater, streams, lakes, and reservoirs.
Hydrological Drought
This means to rotate backwards from east to west.
Retrograde
When molecues of a liquid lose enough energy to become "locked" in a fixed postion.
Freezing
The troposphere contains what percent of the air in the atmosphere by mass?
75%
An asteroid-sized object that is made of rock and frozen materials and forms a bright tail.
Comet
During a blizzard, the large amounts of snow and wind can reduce visibility to almost zero, causing a ___.
Whiteout
Term astronomers use to explain a "sun-centered" theory.
Heliocentric
These air masses form over deserts and bring hot, dry weather; these are the hottest air masses recognized.
Continental Tropical Air Mass
Astronomers classify galaxies by what two things?
Shape & Symmetry
Visible part of the sun.
Photosphere
High altitude winds that are concentrated in narrow, winding bands of rapidly moving air.
Jet Streams
Rapidly rotating neutron star that emits directional beams of radio waves.
Pulsar
These are flat, sheet-like clouds that look similar to stratus clouds, except they are lighter in color and do not produce precipitation.
Altostratus
These air masses form over oceans of frigid regions, such as the northeastern and northwestern coasts of North America.
Maritime Polar Air Mass
The warmest part of the day occurs at what time over land?
3 P.M.
This "sphere" plays a very important role in radio communications and acts like a giant mirror, bouncing certain types of radio waves back down toward the ground.
Ionsphere
What are the two moons of Mars?
Phobos and Deimos