Chapter 6- Landforms Flashcards
What is the evidence of the continental drift theory
Some fossils of the same species were found in different parts of the world, over oceans. Countries look like they could fit together (africa+south america). Appalachian mountains are same age and size as those in greenland.
Continental drift theory
A theory that the continents were at one time united in a super continent called pangaea and have slowly moved apart over millions of years.
What happens when plates meet?
When two olates meet, one is forces over top of the other causing the top plate to fold, crack and break. The plates will slide over each other and rhe friction will cause extremely hot temperatures. This causes magma to form below the cracks and explode through the cracks to form VOLCANOES.
Island arc
A curved line a volcanoes.
Ring of fire
A pattern of volcanoes along the pacific boundaries.
shield
the base of an ancient mountain region where formerly high mountains have been worn away; the foundations of our contients.
plains
a flat, barren area, often plenty in grain. they are former sea bottoms.
valley
a dip in the land that is usually V or U shaped. it is usually caused by running water, moving ice, or movemet of the land around faults.
what is the most mountainous region of canada?
the western cordillera
fold mountains
mountains formed when plates meet and the stronger one pushes the smaller one down, and the stronger one gets pushed above and then bends and rises up.
name the 8 landform regions in canada
western cordillera, interior plains, canadian shield, hudson bay lowlands, st. lawrence low lands, appalachian region, artic lowlands, innuitian region
name one characteristic of the innuitian region and one characteristic for the artic lowlands
innuitian regions= coldest landform region in canada
artic lowlands= cold and low
name one characteristic of the western cordillera and one characteristic of the interior plains.
western cordillera= mountainous
interior plains= flat
name one characteristic of hudson’s bay lowlands and one characteristic of the st.lawrench low lands.
hudson’s bay lowlands= marshy/swampy
st. lawrence lowlands= warmest and most populated
name one characteristic of the Appalachian mountains and one characteristic of the canadian shield
Appalachian Region= bumpy (low mountains)
Canadian shield= formed by volcanic activity
