Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
UNIT 2
| Question | Answer |
|---|---|
| Alfred Wegener | formed the hypothesis that the continents were all connected as one landmass but have moved to their present day location. |
| Pangaea | supercontinent; all land |
| Continental Drift | the idea that the world's land masses are slowly moving over time. |
| Mesosaurus | freshwater reptile found on the tip of South America & Africa |
| Glossopteris | tropical fern that was found on several continents including Antarctica |
| Fossil Evidence | Fossils of the same species are only found on the matching coastlines of continents now separated by oceans |
| Harry Hess | Naval geologists that discovered that the continents move because the ocean floor is getting wider |
| Sonar | technology that uses sound waves to determine the depths and sizes of objects |
| Mid-Ocean Ridge | long underwater mountain range where magma rises up from the mantle |
| Magma | molten material in earth |
| Seafloor Spreading | seafloor slowly grows outward from mid-ocean ridges as new crust is formed, pushing the continents along for the ride |
| Continent | any of the world's main continuous expanses of land |
| Continental Shelf | ocean floor nearest the edges of continents, gentle slope, water over |
| Continental Slope | lies between the continental shelf & rise, sharp drop to ocean floor |
| Continental Rise | a wide gentle incline from a deep ocean plain to the continental shelf |
| Seamount | volcanic mountain range on the ocean floor |
| Abyssal Plain | flat, wide area that forms most of the ocean floor |
| Ocean trench | deep canyon that forms where one plate subducts under another |
| cross section | a view or drawing that shows what the inside of something looks like after a cut has been made across it |
| model | usually small copy of something that is too small or too large to see with the eye. |
| age of rocks | rocks get older at equal rates the farther away from the mid-ocean ridge |
| magnetosphere | a vast, comet-shaped bubble, which has played a crucial role in our planet's habitability. |
| magnetic striping | stripes on the ocean floor are identical on both sides of a mid-ocean ridge. The polarity of the magnetosphere is record in the iron |
| Mountain evidence | mountain ranges end on one coastline and pick back up on another. Rock patterns match up |
| Climate evidence | Deposits of coal show tropical plants used to grown in cold areas and evidence of past glaciers are found in places that are too hot today. |
| What did Pangaea break into? | Laurasia & Gondwanaland |
| Why was Wegener's hypothesis rejected? | He could not explain how the continents moved |
| claim | a proposed answer to a question about the natural world |
| evidence | information about the claim that is used to support |
| reasoning | explain "how" or "why" the evidence supports the claim |
| Oceanic Crust | thinner, more dense, younger |
| continental crust | thicker, less dense, older |
| Mantle | largest layer of earth |
| Mantle | 60% of Earth's total volume |
| Outer Core | Liquid iron & nickel |
| Inner Core | Solid iron & nickel due to extreme pressure |
| As Earth rotates the liquid outer core spins around the solid inner core and creates ___________ | Magnet field - Magnetosphere |
| Largest plate | Pacific plate |
| Which plate do we live on? | North American plate |
| Which plate contains Europe? | Eurasian |
| What is the order of the layers of the Earth? | Crust, Mantle, Outer Core, Inner Core |
| Lithosphere | rigid outer part of earth, consisting of the crust & upper mantle |
| Asthensophere | plastic like area below the lithosphere- solid rock where extreme pressure and heat |
| What marks the boundary of the major plates? | Mid-Ocean ridges |
| What is below Earth's outer layer under land and water? | Under both soil and ocean, Earth's outer layer is solid rock |
| Where is the Ring of Fire located? | Around the Pacific plate |
| Why is the area around the Pacific plate called the Ring of Fire? | The plate is bumped into different directions which causes a great amount of tectonic movement thus creating many earthquakes & volcanoes |
| What type of boundary are the plate moving toward each other? | Convergent |
| What type of boundary are plates scraping past each other? | Transform |
| Which type of boundary do earthquakes occur? | all 3 boundaries |
| What boundary do plates move away from each other? | Divergent |
| Which boundary would you find a mid-ocean ridge? | Divergent |
| Which boundary would you find a rift valley? | Divergent |
| Which boundary would you find a volcano? | Convergent |
| Which boundary would you find mountains? | Convergent |
| What is happening when one plate goes under another plate? | Subduction |
| What is the main force responsible for plate motion? | Convection currents in the mantle |
| What are the driving forces of plate motion? | ridge push-slab pull-convection currents |
| Describe how a convection current works? | material heats up-rises-cools down-sinks |
| How did Hawaii form? | Hot Spots |
| Hot spots are volcanoes that _________________________. | DO NOT form along plate boundaries. |
| Relative Dating | not an exact date older; younger |
| Absolute dating | specific date, numbers |
| What determines an end of an era? | A mass extinction |
| What is a gap in the rock record known as? | An Unconformity |
| Which law states that sediments are deposited in flat layers? | Law of Original Horizontality |
| Which law states the anything that cuts across a layer of rock is younger? | Law of Cross Cutting |
| Which law states that fragments of a rock are older than the entire sample? | Law of Inclusion |
| What is rock strata? | a column of rock |
| How is a fault represented on a rock strata diagram? | solid line |
| How is an unconformity represented on rock strata diagram? | wavy line |
| What are the characteristics of an index fossil? | widespread & short lived |
| What is radioactive decay? | process of an atom losing one or more particles in the atom's nucleus |
| What is an isotope | two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nucleus. |
| What is a half-life? | time needed for half of a sample of a radioactive element to undergo radioactive decay and form daughter isotopes. |
| What do you call the radioactive isotope? | Parent element |
| What do you call the stable part of an isotope? | Daughter element |
Created by:
Ney8
Popular Science sets