Test 1 Flashcards
How do you measure density?
mass / volume = density
What’s the formula for temperature of a mixture?
T1V1 + T2V2 = TmVm
What evidence supports plate tectonics?
glacial deposits, rock and mountain formations, jigsaw continents, fossils, and seafloor magnetic banding
Find the density of a glass of unknown liquid with a mass of 25g and a volume of 13mL.
1.9g/mL
What mechanisms drive plate tectonics?
convection cells and slab pull / plate push
What features can be found at subduction zones?
trenches and volcanoes
How are buoyancy and density related?
Denser objects support lighter objects. If the buoyant force (up) is greater than the force due to gravity (down), then the object floats.
What are the layers of the Earth in order of decreasing density?
inner core, outer core, mantle, oceanic crust, continental crust
What types of plate boundaries result in trenches, violent volcanoes, and deep earthquakes?
convergent O:O, convergent O:C
How is magnetism related to Earth’s structure?
The liquid outer core has a lot of iron. Because it is an iron-filled liquid that is moving (convection), this generates a magnetic field.
What is the one plate boundary type that cannot create a volcano?
transform
What is the difference between oceanic and continental crust?
Continental crust is less dense; oceanic crust is denser and thinner.
A piece of metal has a volume of 20.0mL and a mass of 67.8g. What is the density?
3.39g/mL
How many significant figures does 100 cm have?
It depends! If it’s just given to you like “100 cm” you must assume one. However, if you measured something and you know you are accurate within 1 cm, then it has three sig figs.
What’s the difference between continental drift and plate tectonics?
CD: a hypothesis that has been discarded. Never became a theory because it couldn’t explain why the continents moved.
PT: a scientific theory supported by multiple lines of evidence that explains how the Earth’s tectonic plates move.
