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What is an era?
A period of time considered to be dinstinctive
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What are the four geologic eras?
- *Cenozoic
- *Mesozoic
- *Paleozoic
- * Precambrian
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Which era is the earliest?
Precambrian
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What are two important facts about the precambrian era?
- *Era of mountain building
- *Canadian shield formed of the three different kinds of rock
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Which era is the ancient?
Paleozoic
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Name three important facts about paleozoic era?
- *Sediments from shield deposited from shallow seas
- *living organisms in seas at first, then insects and amphibians
- *Plant/forests first appeared
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Which era was created in the middle?
Mesozoic
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Name three important facts about mesozoic era
- *Pangaea began to break up
- *Dinosaurs
- *Plates collided, mountains formed
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Which is the most recent
cenozoic
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Name four important facts about cenozoic
- *Ice ages, may not be the last one
- * age of mammal and humans
- *Our impact, in a short period of time and has been enormous
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What are three kinds of rock
- *Igneous
- *Metamorphic
- *Sedimentary
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What is a Igneous Rock
Hardened molten lava
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what is Metamorphic
Heated/ pressurized Igneous rock
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What is sedimentary rock
Broken down rock
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What is Pangaea?
Pangaea is the name of the continents when they were joined together forming a super continent; Pangaea.
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What are the three main parts of the earth?
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How many plates is the earth made up of?
20!
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What does the movement of the plates cause?
- *Volcanoes
- *Earthquakes
- * mountains
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The cracks formed in the earths crust created by earthquakes are called:
Faults
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Hot rock called _______ may force it's way to the surface.
magma
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Magma is called______when above the crust. It builds up layer after layer causing a_____to be formed.
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The earths crust can be changed by:
erosion
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The four main elements of erosion are:
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Glaciers covered parts of north america ___ million years ago.
2
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What are the three main areas of Canada?
- Lowland
- Highland
- Canadian Shield
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What is another name for the Canadian shield?
Precambrian shield because it was formed in the Precambrian era
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Canadian shield has rock which is over___million years old.
350
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What are the two kinds of rock that make up most of this region?
Igneous and metamorphic
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The hudson bay and arctic lowlands are covered by flat____ and some forest.
swamp
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What kind of rock does it have
Sedimentary
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Great lakes and st. lawrence lowlands has a______-landscape carved by_______.
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What kind of rock does it have?
Sedimentary
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What does the shield have a great resource of which gives it another name, what are some of thses metal?
- Canada's storehouse of metallic metals
- because contains valuable minerals
- great quantities
- lead, gold, nickel, copper, zinc
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