APPPROXIMATELY_______ OF EARTH'S PERSISTENT
ICE COVER FLOATS AS SEA ICE
What is 2/3
100
SNOW FORMS AS A RESULT OF _________OF TINY WATER DROPLETS INTO FEATHERY ICE CRYSTALS IN CLOUDS, AT VERY LOW TEMPERATURE
What is CRYSTALLIZATION
100
THE PART OF THE EARTH'S SURFACE THAT REMAINS PERENNIALLY FROZEN
What is THE CRYOSPHERE
100
SOME GLACIERS EXPERIENCE EPISODES OF UNUSUAL BEHAVIOR MARKED BY RAPID MOVEMENT AND DRAMATIC SIZE IN FORM, SUCH AN EVENT IS CALLED
What is A SURGE
200
a Cirque glacier that expands outward and downward
What is a Valley Glacier
200
THE FIRST ICE TO FORM CONSIST OF SMALL CRYSTALLINE PLATELETS AND NEEDLES UP TO 3 OR 4 mm IN DIAMETER
What is FRAZIL ICE
200
THE CRYSTAL STRUCTURE OF SNOW IS OPEN AND_______, BUT WHEN DEPOSITED AS PRECIPITATION IT SETTLES AND BECOMES COMPACTED
What is POURUS
200
HUGE CONTINENT SIZE _____ ______ OVERWHELM NEARLY ALL THE LAND SURFACE WITHIN THEIR MARGINS
What is ICEE SHEETS
200
______% OF AN ICEBERGS MASS LIES BELOW SEA LEVEL
What is 90
300
A WARM GLACIER
What is A TEMPERATE
300
SCIENTIST COMMONLY CATEGORIZE SEA-ICE AS BEING EITHER_______ OR_______
What is PERENNIAL OR SEASONAL
300
A SOLID FORM OF H20
What is ICE
300
A COLD GLACIER IS COMMONLY CALLED A
What is POLAR GLACIER
300
IN 1912 THE S.S. TITANIC SUNK AFTER HITTING THIS MASS OF ICE
What is AN ICEBERG
400
THE DROWNED SEAWARD END OF A GLACIER CARVED BEDROCK TROUGH
What is A FJORD GLACIER
400
ICE HAS A HIGH__________ WHICH MEANS THAT AN ICE-COVERED SURFACE REFLECTS INCOMING SOLAR RADIATION RATHER THAN ABSORBING IT
What is A HIGH ALBEDO
400
FORMS BY THE ACCUMULATION, COMPRESSION AND RECRYSTALLIZATION OF SNOW
What is GLACIER ICE
400
THE ADDITIONS AT THE END OF A YEAR OF A GLACIERS MASS BALANCE IS CALLED_________
What is ACCUMULATION
400
THE PROGRESSIVE BREAKING OFF OF ICEBERGS FROM THE FRONT OF A GLACIER THAT TERMINATES IN DEEP WATER
What is FRONTAL CALVING
500
A PERSITENT BODY OF ICE
What is A GLACIER
500
THE CONTRASTING GEOGRAPHY OF EARTH'S_______ AND________REGIONS LEADS TO IMPORTANT DIFFERENCES TO THE DISTRIBUTION OF SEA ICE
What is NORTH AND SOUTH POLAR REGIONS
500
ICE IS ONE OF THE FEW SOLIDS IN NATURE THAT HAS A _________ LESS THAN ITS COUNTERPART WATER
What is DENSITY
500
COVER MOUNTAIN HIGHLANDS OR LOW LYING LAND AT HIGH LATITUDES AND GENERALLY FLOW RADIALLY OUTWARD FROM THEIR CENTER
What is ICE CAPS
500
PERIODS AT WHICH THE AVERAGE TEMPERATURE AT EARTH'S SURFACE DROPS BY SEVERAL DEGREES AND STAYS LOW LONG ENOUGH FOR ICE SHEETS TO GROW LARGER (AND FOR NEW ONES TO FORM) ARE CALLED