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Science 7 Planet Earth Flashcards | StudBud
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Science 7 Planet Earth
Science 7 Planet Earth
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#alberta #geology #mantle #crust #volcano #earthquake #tectonic #formation #rocks #minerals #boring
Flashcards
21 cards
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Questions
21
Answers
1
Rocks that form when lava cools on the surface are ___. Rock formed when magma hardens below Earth’s surface is ___.
igneous, sedimentary
intrusive, extrusive
sedimentary, igneous
extrusive, intrusive
2
Compared to the other layers of the Earth, the crust is...
thicker than the upper mantle.
thicker than the lower mantle.
thinner than any other layer.
thicker than any other layer.
3
On a field trip to the foothills, the students noticed a tree’s roots growing through rock. This is...
mechanical weathering.
chemical weathering.
biological weathering.
a sign that a volcanic eruption will soon occur. Those kids are goners.
4
André tested the effects of acidic water on the natural rock samples found in his schoolyard. This can cause...
mechanical weathering.
the police to investigate André for acts of terrorism.
chemical weathering.
biological weathering.
5
Metamorphic rock is formed as a result of...
rapidly decreasing temperatures.
high temperature and pressure.
extreme temperature fluctuations.
lower pressure and moisture.
6
This factor might be the best way to determine the age of a mountain.
anticline
syncline
kinds of rock
shape of peak
7
When an organism falls into soft sediment, its hard parts dissolve, leaving a cavity called a...
cast.
trace.
chamber.
mould.
8
Sedimentary rock is a type of rock that....
forms below Earth's surface.
has changed form.
forms in layers.
is only found near a volcano.
9
Minerals can be identified by several clues. The way a mineral breaks is called its...
cleavage
colour
streak
lustre
10
Cubic, tetragonal, hexagonal, orthorhombic, monoclinic and triclinic describe systems of...
synthetic materials.
crystal structures.
mineral hardness.
cleavage types.
11
Earth's inner core is ______; its outer core is _______.
liquid, gas
solid, liquid
gas, solid
liquid, solid
12
Tectonic plates move relative to one another by all of the following except...
diverging.
thrusting.
converging.
sliding.
13
Alfred Wegener’s theory that the continents once fit together was called…
continental drift.
plate tectonics.
converging plates.
sea floor spreading.
14
What was the name given to the supercontinent made of all current existing continents?
Panago
Pangaea
Calradia
Genestland
15
Naturally occurring mixtures of hydrocarbons in sedimentary basins are called...
oil wells.
petrochemicals.
oil sands.
petroleum.
16
In radiometric dating, the daughter material of a rock is 75% and the parent material is 25%. It has undergone...
2 half lives
3 half lives
1 half life
4 half lives
17
When we know the age of certain fossils, we can use them to determine the age of others. These known fossils are...
index fossils.
intensified fossils.
parent fossils.
petrified fossils.
18
Magma under the Earth’s surface creates convection currents that are responsible for moving tectonic plates.
True
False
None of your business
19
Tony poured water into a crack in a rock and froze it, then allowed it to thaw. The crack widened. This is...
chemical weathering.
mechanical weathering.
stupid. Why doesn't Tony get a real hobby?
biological weathering.
20
Volcanoes erupt when they become active. Until an eruption occurs, volcanoes are described as...
plugged.
extinct.
dormant.
stagnant.
21
The source of an earthquake, the ____, can be determined by recording the interval time between the
p
waves and
s
waves.
foci
epicenter
shadow zone
focus
