chapter 14

Question 1

true or false: By volume, most of the ice on Earth is in the form of sea ice.

Answer 1

false

Question 2

define non tabular ice berg

Answer 2

An iceberg with any shape other than tabular.

Question 3

define tabular ice berg

Answer 3

Flat-topped, steep-sided iceberg with a length greater than five times the height.

Question 4

define polyna

Answer 4

An area of persistent open water in areas otherwise covered with ice.

Question 5

define pack ice

Answer 5

Free-floating ice floes.

Question 6

define sea ice

Answer 6

Ice formed by the freezing of seawater.

Question 7

define ice field

Answer 7

An area covered by ice floes.

Question 8

define frazil

Answer 8

Small, needle-like crystals in the first stages of sea ice formation

Question 9

define ice floe

Answer 9

A relatively large piece of floating sea ice

Question 10

define iceberg

Answer 10

A large mass of glacial ice floating in the ocean that was formed on or adjacent to land.

Question 11

define brinicle

Answer 11

Downward-growing vertical hollow tube formed by supercooled brine.

Question 12

define firn

Answer 12

The granular transitional state between snow and ice within a glacier.

Question 13

define grease ice

Answer 13

An accumulation of frazil to create a slushy consistency in sea ice formation.

Question 14

define pressure ridge

Answer 14

Jagged ridge created from colliding and buckling ice floes.

Question 15

define glacial ice

Answer 15

Ice formed from the accumulation and compression of snow into glaciers.

Question 16

define fast ice

Answer 16

Large, solid ice sheets that are attached to land.

Question 17

define nilas

Answer 17

A thin surface sheet of sea ice.

Question 18

what is is the most important factor in deciding the pathway for sea ice formation?

Answer 18

winds and waves

Question 19

Polynyas that occur in the open ocean are known as
_________
polynyas and are thought to be the result of
__________
whereas polynyas that are formed near a barrier are known as
________
polynyas and
______
act to remove the newly formed ice.

Answer 19

sensible heat, upwelling, latent heat, and winds

Question 20

true or false: Most large icebergs are formed from sea ice.

Answer 20

false

Question 21

true or false:10 cm of fresh water glacial ice will support less weight than the same thickness of sea ice.

Answer 21

false

Question 22

The Arctic is warming faster, about twice as fast, than low-latitude regions, a phenomenon known as
________
. The primary driver appears to be ________

Answer 22

Arctic amplification and decline in sea ice

Question 23

true or false: Sea ice first forms at colder temperatures than fresh water ice.

Answer 23

true

Question 24

what is the correct order in the stages of sea ice formation:

Answer 24

frazil → grease ice → nilas → pancake ice → ice floe

Question 25

true or false:Most large icebergs are formed from sea ice.

Answer 25

false

Question 26

The floating chunks of sea ice are referred to as

Answer 26

pack ice

Question 27

Tabular icebergs are more common near:

Answer 27

antarctica

Question 28

what is/are correct regarding ice and climate change?

Answer 28

Arctic sea ice extent has been declining over the past few decades, Arctic sea ice extent has been declining over the past few decades, Some areas of Antarctica have been showing warming temperatures and declining ice, while other areas have cooled and showed increasing ice

Question 29

true or false: Sea ice is almost as salty as seawater.

Answer 29

false

Question 30

true or false:10 cm of fresh water ice will support more weight than the same thickness of sea ice

Answer 30

true

Question 31

define pancake ice

Answer 31

small, rounded, thin pieces of sea ice that will freeze together to form an ice floe

Question 32

what is a domed ice berg

Answer 32

iceberg with a rounded top

Question 33

what is a pinnicled ice berg

Answer 33

an iceberg with one or more tall spires

Question 34

what is a blocky ice berg

Answer 34

iceberg with a flat top and steep sides, but their length to height ratio is not as great as it is for a tabular iceberg

Question 35

what is a wedge ice berg

Answer 35

iceberg with a steep face next to a more gradually sloping sid

Question 36

what is a drydock ice berg

Answer 36

iceberg with a water-covered channel running through it

Question 37

what is a tabular ice berg

Answer 37

flat-topped, steep-sided iceberg with a length greater than five times the height