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8th Grade Science PSSA Flashcards | StudBud
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8th Grade Science PSSA
8th Grade Science PSSA
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Science review
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1
Two destructive processes that continually wear down and shape the Earth are ______
weathering & erosion
petrification & alienation
uniformitarianism & radioactivity
cross-cutting & superposition
2
The iron/nickel inner core is solid due to _____
molten lava
heat
amount of iron
pressure
3
Molten lava can reach the surface of the Earth in subduction zones because of ______
human activity
gravity and Earth's pull
pressure and weak crust
heat and friction
4
Two solids touching would best describe the type of thermal transfer called ______
conduction
solidification
hot glow
convection
5
The atmosphere that surrounds Earth is a mixture called air that has both _______ and _______
photons / waves
CO2 / radiation
mass / volume
poisons / pressure
6
Which of the following is NOT a type of heat transfer ?
radiation
collision
conduction
convection
7
Petrified wood, footprint tracks, casts, and molds, are all types of _______
carbon -14 dating
relative age dating
fossils
isotropic formations
8
In each atmospheric layer above Earth, 2 properties drastically change with altitude; they are
illumination / air density
temperature / wind direction
temperature / pressure
aurora's / currents
9
Most rocks that make up the Earth's crust are made of the elements ________ and ________.
calcium/sodium
silicon/oxygen
nickel/hydrogen
iron/aluminum
10
Moh's Scale is a system designed to compare the _________ of minerals .
color
crystal shape
hardness
value
11
Fossils provide evidence for an organism's _________________ .
change over time
value after death
true weight in pounds
rate of motion
12
Properties used to identify minerals include _____
color, luster, cleavage, streak
Moh's, Crystal Structure, Specific Value
color, hardness, streak, richness, shape
luster, hardness, temperature, strength
13
The Sierra Nevada mountain chain is an example of a __________ formation.
fault - block
cinder - block
folded
composite cone
14
An anemometer measures __________ , while a barometer measures __________
cloud type / Dew point
Jet Stream / rainfall
wind direction / humidity
wind speed / air pressure
15
The type of rock made from compacting and cementing is ____
metamorphic
igneous
sedimentary
plutonic
16
A process where energy provided by the sun continuously cycles water through earth’s systems is
subsurface currents
the deformation process
the water cycle
the jet stream
17
The sun is a ________ - sized star that is the central and largest body in our _________
large / planet
giant / galaxy
medium / solar system
small / universe
18
Crustal plates that diverge cause ________ and __________ .
earthquakes/tsunamis
mid ocean ridges/rift valleys
deep sea trenches/mountains
hotspots/volcanoes
19
Factors affecting climate in a region include ______
population, distance from water, cloud cover,
latitude, elevation, nightfall,
latitude, topography, elevation, winds,
distance from water, longitude, animal species
20
Evidence used to support the theory of continental drift include ________.
asteroid impacts and comet dust
Alfred Wegener's notebooks
satellite imagery
rocks, fossils, geological structures
21
A main characteristic of the molten material of Earth's mantle is that it is like _______
cool crispy wafers
hot thick oatmeal
fiery solid metal
thin onion skin
22
Our moon has a 27.3 day cycle. "Opposite" phases of our moon are _______
New moon / Waning crescent
Waning gibbous / Full moon
Waxing crescent / Waxing gibbous
1st Quarter / 3rd Quarter
23
Earthquakes, mountain building, and volcanic eruptions often occur at the ________
edges of the Earth
boundaries between plates
center of the crust
focus of faults
24
The position of the tilted Earth and strength of sun's rays in Spring and Fall give us _____
solstices
rain shadows
eclipses
equinoxes
25
Inorganic parts of soil include a mixture of _______
mature rock, nitrogen, plants, tunnels
weathered rock, fungi, CO2,
rock, minerals, water, air
bedrock, bacteria, humus, twigs
