Page 360 - Laboratory Manual in Physical Geology

ACTIVITY ACTIVITY

13.1 Cryosphere Inquiry 13.3 Continental Glaciation of

THINK | What is the cryosphere, and how do North America
About It changes in the cryosphere affect other THINK |
parts of the Earth system? How do glaciers affect landscapes?
About It
OBJECTIVE Analyze global and regional

components of the cryosphere, and then infer how OBJECTIVE Analyze features of landscapes aff ected
they may change and ways that such change may by continental glaciation and infer how they formed.

affect other parts of the Earth system.
PROCEDURES
PROCEDURES 1. Before you begin , read the Introduction, Glaciers,
1. Before you begin , do not look up defi nitions and and Glacial Processes and Landforms. Also, this is
information. Use your current knowledge, and what you will need :
complete the worksheet with your current level of ____ Activity 13.3 Worksheet (p. 351 ) and pencil
ability. Also, this is what you will need to do the
2. Then follow your instructor’s directions for
activity:
completing the worksheets.
____ pen
____ Activity 13.1 Worksheets (pp. 347–348 ) and
pencil
2. Complete the worksheet in a way that makes Dynamic Cryosphere
sense to you.
The total amount of ice on Earth’s surface is ever-
3. After you complete the worksheet , be prepared changing due to annual variations in global patterns
to discuss your observations and classifi cation of air circulation and regional variations in things
with other geologists. like ground temperature, ocean surface temperature,
and the weather (daily to seasonal conditions of the
atmosphere, such as air temperature and humidity,
ACTIVITY wind, cloud cover, and precipitation). Global
and regional amounts of ice are also affected by
13.2 Mountain Glaciers and climate —the set of atmospheric conditions (like air
Glacial Landforms temperature, humidity, wind, and precipitaion) that
prevails in a region over decades. A region’s climate

THINK | is generally determined by measuring the average
conditions that exist there over a period of years or
About It How do glaciers affect landscapes?
the conditons that normally exist in the region at a
particular time of year.

OBJECTIVE Analyze features of landscapes aff ected
by mountain glaciation and infer how they formed. Climate Change
PROCEDURES A region’s climate is based on factors like latitude,
altitude, location relative to oceans (moisture
1. Before you begin , read the Introduction, Glaciers,
and Glacial Processes and Landforms. Also, this is sources), and location relative to patterns of global

what you will need : air and ocean circulation. Climate change refers to
a significant change in atmospheric conditions of a
____ ruler, calculator region or the planet. This can occur due to natural
____ Activity 13.2 Worksheets (pp. 349–350 ) and factors like changing patterns of global air circulation,
pencil
variations in volcanic activity, and changes in solar
2. Then follow your instructor’s directions for activity. It can also occur due to human factors
completing the worksheets. like construction of regional urban centers (adding
regional sources of heat energy) and deforestation
where ice permanently covers the ground (glaciers and (removing a transpiration source of atmospheric water
ice caps, ice sheets), to places where ice covers parts of vapor; adding soot and gases to the atmosphere as the
the ocean (ice shelves, sea ice). The ice in your freezer forest is burned).
may last for days or months, but ice in some of Earth’s
ice caps is thousands of years old.

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