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