問題一覧
1
continental and oceanic crusts are both formed by _____ during _______.
magma during volcanic eruption
2
what is the age's of the oceanic crust?
up to 200 million years old
3
tectonic plates vary in size, averaging around _____ in thickness.
100 km (62 mi)
4
name the 2 types of crusts
continental crust and oceanic crust
5
name the layers of the earth..
crust, moho, upper mantle, lower mantle, D" layer, outer core, liquid-solid boundary, inner core
6
the oceanic crust is denser than the continental crust because it is made of?
basalt
7
tectonic plates are the rigid sections of the lithosphere that ________.
moves as a unit
8
the earth's crust is the _____ of the lithosphere.
upper layer
9
movements of ______ causes earthquakes and volcanoes..
tectonic plates
10
what are the two particular major plates that are found along the philippine archipelago?
philippine sea plate and eurasian plate
11
the earth's lithosphere is broken into numerous rigid segments called? composed of the _____ and _____.
tectonic plates, crust and upper mantle
12
_____ is the outer portion of the earth's layer.
crust
13
earth's lithosphere consists of layers, the _____ and the ______.
crust and the upper mantle
14
what do you call the 2 scientist that studies the earth?
geologists and seismologists
15
the continental crust is less denser than the oceanic crust because it is made of?
granite
16
what is the age's of the continental crust?
up to 4 billion years old
17
the type of the plates that comprise the bulk of the continents and the pacific ocean is called _____.
major plates
18
the continental crust is older than oceanic crust because it is..
thicker
19
there are also two other important layers which are?
lithosphere and asthenosphere
20
oceanic crust is rich in?
sima (silicon and magnesium)
21
tectonic plates can be categorized based on their size... what are those called?
primary (major), secondary (minor), tertiary (microplates)
22
give me the 3 types of solid rocks that can be found at crusts
igneous, sedimentary, metamorphic
23
name the three main layers that the earth is made up of?
crust, mantle, core
24
continental crust is rich in?
sial (silicon and aluminum)