Idk

Question 1

Determining the age of Geological sample by calculating radioactive decay and its position in relation to other samples

Answer 1

Absolute dating

Question 2

Determining the age of geological sample by composing it’s positions of other samples

Answer 2

Relative dating

Question 3

Downward movement into the asthenosphere of a lithospheric plate

Answer 3

Subduction

Question 4

Area at which a lithospheric plate is descending into the asthenosphere. The zone is characterized by linear folds (trenches) in the ocean floor and strong deep focus earthquakes

Answer 4

Subduction Zone

Question 5

An instrument that detects and records earth movement associated with earthquakes and other disturbances

Answer 5

Seismograph

Question 6

The junction between diverging plates at which new ocean floor is being made; also called spreading zone

Answer 6

Spreading Center

Question 7

Secondary wave; a transverse wave that is associated with an earthquake and that cannot move through liquid

Answer 7

S wave

Question 8

Theory that new ocean crust forms at spreading centers, most of which are on the ocean floor and pushes the continents aside. Power is thought to be provided by convection currents in earths upper mantle

Answer 8

Sea floor Spreading

Question 9

Low frequency wave generated by the forces that cause earthquakes. Some kinds of seismic waves can pass through Earth. See also P waves;S wave

Answer 9

Seismic Waves

Question 10

Logarithmic measure of earthquake magnitude. A great earthquake measures above 8 on the scale

Answer 10

Richter Scale

Question 11

One of about a dozen rigid segments of Earths lithosphere that move relative to each other and are driven by convection currents in the mantle. Most volcanic and seismic activity occurs at plate margin

Answer 11

Plate

Question 12

The theory that Earths lithosphere is fractured into plates that move relative to each other and are driven by convection currents in the mantle. Most volcanic and seismic activity occurs at plate margins

Answer 12

Plate Tectonics

Question 13

Disintegration do unstable forms of elements, which releases subatomic particles and heat

Answer 13

Radioactive Decay

Question 14

Primary wave; a compressional wave that is associated with an earthquake and that can move through both liquid and rock

Answer 14

P wave

Question 15

The zone of seismic and volcanic activity that encircles the Pacific Ocean

Answer 15

Pacific Ring of Fire

Question 16

The “fossil” ow remanent, magnetic field of a rock

Answer 16

Paleomagnetism

Question 17

Given name by Alfred Wegener to the original “protocontinent” The break up of blank gave a rise to the Atlantic Ocean

Answer 17

Pangea

Question 18

Ascending columns of superheated mantle originating at the core mantle boundary

Answer 18

Mantle

Question 19

The outermost solid surface of Earth beneath ocean floor sediments, composed primarily of basalt

Answer 19

Oceanic crust

Question 20

The hot, plastic layer of the upper mantle below the lithosphere, extending to 350-650 kilometers (220-400) below the surface. Convection currents within he power plate tectonics

Answer 20

Asthenosphere

Question 21

Relatively heavy crustal rock that forms the sea beds composed, mostly of oxygen silicone magnesium and iron

Answer 21

Basalt

Question 22

The ability of an object to float in a fluid by displacement of a volume of fluid equal to it in mass

Answer 22

Buoyancy

Question 23

The transfer of heat through matter by the collision of one atom with another

Answer 23

Conduction

Question 24

The solid masses of the continents, composed mainly of granite

Answer 24

Continental Crust

Question 25

The theory that the continents move slowly across the surface of earth

Answer 25

Continental Drift

Question 26

Movement within a fluid resulting from differential heating and cooling of the fluid. Produces mass transport or mixing of the fluid

Answer 26

Convection

Question 27

A single closed- flow circuit of rising warm material and falling cool material

Answer 27

Convection current

Question 28

Region where plates are pushing together and where a mountain range, island arc, and/or trench will eventually form; often a site of much seismic and volcanic activity

Answer 28

Convergent plate boundary

Question 29

Innermost layer of Earth, composed primarily of iron, with Nickel and heavy elements. The inner core is thought to be solid sphere and the outer core a liquid mass

Answer 29

Core

Question 30

Mass per unit volume of a substance, usually expressed in grams per cubic centimeter

Answer 30

Density

Question 31

Formation of layer in a material, with each deeper layer being denser (weighing more per unit of volume) than the layer above

Answer 31

Density Stratification

Question 32

The field that looks at interactions among human systems and in those found in nature

Answer 32

Environmental Science

Question 33

Region where plates are moving apart and where new ocean or rift valley will eventually form. A spreading center forms the junction

Answer 33

Divergent plate boundary

Question 34

Sudden motion of earths crust resulting from waves in earth caused by faulting of the rocks or by volcanic activity

Answer 34

Earthquake

Question 35

Time required for 1/2 of all the unstable radioactive nuclei in a sample to decay

Answer 35

Half life

Question 36

Fracture in Rock mass along which movement has occurred

Answer 36

Fault

Question 37

Relatively light crustal rock composed mainly of oxygen silicone and aluminum that forms the continents.

Answer 37

Granite

Question 38

A surface expression of a plume of magma rising from a stationary source of heat in the mantle

Answer 38

Hotspot

Question 39

Balanced support of the lighter material in a heavier, displaced supporting matrix; analogous to buoyancy in a liquid

Answer 39

Isostatic Equilibrium

Question 40

The brittle, relatively cool outer layer of Earth, consisting of the oceanic/continental crust and the outermost, rigid layer of the mantle

Answer 40

Lithosphere

Question 41

Molten rock capable of fluid flow called lava above ground

Answer 41

Magma

Question 42

The wideband of earths surface 105° to 143° away from an earthquake in which seismic waves or nearly absent. P waves are absent because they are refracted by earths liquid outer core; S waves are immediately absent from this band

Answer 42

Shadow zone