Answer: D. It can melt to a depth of a few meters in summer, then refreeze in winter.
Explanation:
Permafrost is ground which remains frozen for two or more years. Permafrost consists of soil, rock and sand fused together by ice. Mostly found in areas in high altitude, the Arctic, Antarctica, it is common in periglacial environments where temperatures are below freezing
.
The topmost layer of permafrost can melt in summer and refreeze in winter. This thawing and refreezing produces a ground pattern called columnar joints similar to the one formed when molten lava cools.
Answer:
Option B = No, it is not a rectangle because the sides of the parallelogram do not meet at right angles!
cumulus: fluffy cotton balls
stratus: overcast days, rainfall
cirrus: fair weather
fog: warm air over cold ground
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Answer:
<em>Catholic church:</em>
<em>The crusades contributed to increase the wealth of the church and the power of the papacy. The popes took over the enterprises authority and influence, by placing their hands, their armies and resources of Christendom and adapted the people to look at them as leaders.</em>
<em>Thousands of the crusaders, returning broken in spirits and in health sought an asylum in monasterie-retreats, and along with them were their wordly goods.</em>
<em>The Crusades:</em>
<em>The Crusades were military campaigns sanctioned by the Catholic Church in the Middle Ages.</em>
<em>Effects of the crusades:</em>
<em>The crusades kept all Europe in tumult for two centuries and cost Christendom several millions of lives. The holy wars affected indirectly and became an important factor in the history of the progress of civilization.</em>
