SCIENCE Flashcards
4 LAYERS OF THE EARTH
CRUST
MANTLE
OUTER CORE
INNER CORE
Crust and Mantle make up?
Lithosphere
The lithosphere is broken into?
Tectonic Plate
Below the lithosphere is the? which is about 180 km thick and contains hot, molten rocks or magma.
Asthenosphere
The tectonic plate move due to? (The 2 forces)
Driving forces
Resisting forces
It is comprise of the Lithosphere.
Crust
The Crust- It makes up the continents called___________ and is about 40 to 70 km thick
Continental Crust
The crust is made up of light granitic rocks made up mostly________?
Aluminum Silicates
is composed of major and minor blocks, called tectonic plates- that interact and create the tectonic activities on Earth.
Lithosphere
The asthenosphere can deform and reshape driven by heat energy, which circulates as?
Convection Currents
Therefore, this heat transfer mechanism helps drive the movement of tectonic plates, which manifested as?
Earthquakes.
TRUE OR FALSE?
Scientists believe that tectonic plates move because of convection currents that flow up from the core of the Earth and circulate under the asthenosphere
TRUE
underlies the ocean floor called the?
Oceanic cRUST
the Oceanic Crust has an average thickness of ?
5Km
Oceanic Crust is composed of?
dense Basaltic rocks and Magnesium Silicates
An English astronomer and mathematician, theorized that Earth is hallow
Edmund Halley
TRUE OR FALSE?
Harry Hess said the core was about the size of Mercury and that these layers were also inhabited.
FALSE
(IT WAS EDMUND HALLEY)
TRUE OR FALSE?
science confirms that the outer core of Earth is even bigger than Mercury.
TRUE
Based on seismological data, Earth’s outer core has a radius of?
3400 km
Based on seismological data, Mercury has a radius of?
2440km
Age of continental plates?
3.8 to 4 billion yrs old
Age of Oceanic plates?
less than 200 million years old
Coverage of Continental plates in the Earth’s surface?
71%
Coverage of oceanic plates in the Earth’s surface?
29%
It is a semi-solid, rocky and very hot layer.
Mantle
Mantle is composed of?
Ferro-magnesium silicates rocks
It is composed of Ferro-magnesium silicates rocks
Mantle
measures about 2900 km thick that makes up 80% of Earth and carries most of its mass.
Mantle
The temperature of the top layer of mantle?
900 C (900 degree celsius)
As goes deeper into mantle , temperature increases from?
1000 to 3700 C (degree celsius)
only layer that is liquid which made up of molten nickel and iron.
Outer Core
Outer core is made up of?
molten nickel and iron.
It is about 2270 km thick and has temperature ranges from 3700 to 4300 ᴼC.
Outer core
The inner core has a diameter of?
1220km
TRUE OR FALSE?
The inner core is composed of mostly solid iron.
TRUE
is extremely hot; it’s temperature is recently estimated about 6000 ᴼC.
Inner core
The 3 INTERFACES MARK THE BOUNDARIES BETWEEN LAYERS:
The Mohorovicic Discontinuity
The Gutenburg Discontinuity
The Lehman Discontinuity
It marks the boundary between the lower mantle and the outer core.
The Gutenburg Discontinuity
It is the interface between the crust and the upper mantle.
The Mohorovicic Discontinuity
It is located between the liquid outer core and solid inner core.
The Lehman Discontinuity
These features can be sources of different minerals or can used for agricultural
purposes. For instance, we have the majestic and renowned What Volcano?
Mayon Volcano
found in the northeast coast of Luzon, we have thefound in the northeast coast of Luzon, we have the__________ mountain range which is a home to many endemic species of flora and fauna.
Sierra Madre
A theory that suggests that Earth’s Crust is made up of plates that interact in various ways, thus producing earthquakes, mountains, volcanoes, and other geologic features.
PLATE TECTONICS
TRUE OR FALSE?
iT IS SUGGEST THAT PLATES ARE MOVING AND LEAD TO THE CHANGE IN THE SURFACE
TRUEE
A German Meteorologist, proposed a theory “The Continental Drift” that about 200 million years ago, the continents were once one large landmass.
ALFRED WEGENER (1912)
What did Alfred Wegener called this landmass?
Pangaea
“Pangaea’ a Greek word means?
“All Earth”.
A theory that states that the Continents are moving
Continental Drift Theory
Was Wegener Theory that the continents were once joined together was accepted?
NO
(It was not accepted and he was not able to explain how this drifting took place)
During WHAT YEAR, new techniques and modern gadgets enabled scientists to make better observations and gather new information about the ocean floor.
1960s
With the use of __________, scientists had a clearer view of the ocean floor.
(They have discovered underwater features deep within the ocean.)
sonars and submersibles
He proposed a theory of the “SEAFLOOR SPREADING”
HARRY HESS (1960s)
He stated that oceans have tectonic Activity
HARRY HESS (1960s)
It is a hot, less dense materials below the Earth’s crust rises towards the surface at the mid-ocean ridge.
SEAFLOOR SPREADING
Where the deformation of Lithosphere is happening.
PLATE BOUNDARIES
PLATE BOUNDARIES IS ALSO KNOWN AS?
ZONE OF INTERACTION
THE MOST DESTRUCTIVE
-SUBDUCTION ZONE
Convergent BOUNDARY
The 3 types of convergent Boundary
Oceanic - continental (O-C) Convergent Boundary
Oceanic- Oceanic (o-O) Convergent Boundary
continental-Continental (C-C) Convergent Boundary
It produces mountain ranges
Oceanic - Continental (O-C) Convergent Boundary
iT CREATES ISLANDS
Oceanic- Oceanic (O-O) Convergent Boundary
It produces tall mountain ranges
continental-Continental (C-C) Convergent Boundary
nEITHER PLATES SUBDUCT
continental-Continental (C-C) Convergent Boundary
OCEANIC PLATES SUBDUCT
Oceanic - continental (O-C) Convergent Boundary
Older plates subduct
Oceanic- Oceanic (o-O) Convergent Boundary
CONSTRUCTIVE Boundary
DIVERGENT BOUNDARY
It is CONSERVATIVE
TRANSFORM FAULT BOUNDARY
it produces RIFTS
DIVERGENT BOUNDARY
It creates faults and fracture zones
TRANSFORM FAULT BOUNDARY
The movement of plates is influenced by two types of forces
Driving forces
Resisting forces
Push tectonic plates forward or toward one another or pull them apart
Driving Forces
Core rising toward the mantle
Mantle Convection
drive the plates away from one another, this heat dissipates and creates a current due to the difference in temperature.
Convection Current
-OPPOSITE OF MANTLE DRAG
-takes place when a subducting slab sinks into the hot mantle because of a difference in temperature
- The rest of the plate to which the slab is attached to is pulled in as well.
Slab pull
occurs two colliding plates, one subducting underneath the other, whereby convection currents in the upper mantle suck both plates down.
Slab suction
when the lithosphere is pushed up by the asthenosphere because of convection currents from the mantle.
Gravity pushes the plate down the ridge and a new crust is formed.
Ridge Push
Act against the driving forces of plate tectonics
Resisting forces
FORCE that resists all the forces associated with plate movement in subduction zones.
- Plates collide of a plate boundary
SLAB RESISTANCE
occurs when a heavy plate is pulled into the mantle but resists subduction because of friction.
Collisional Resistance
-This force opposes the slab pull
Collisional Resistance
is the frictional force due to the opposing MOVEMENT OF PLATES MOVING PAST ONE ANOTHER BETWEEN TWO SPREADING CENTERS.
-“ZONE OF ATTRACTION”
Transform fault resistance
Resist movement of lithospheric or in atmospheric plates
drag force
WHAT ARE THE 4 DRIVING FORCES?
Mantle convection
Slab pull
slab suction
Ridge push
WHAT ARE THE 4 RESISTING FORCES?
slab resistance
collisional resistance
transform fault resistance
drag force
POGI BA SI JHARED YES OR YES
YES!!!!