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Eskers are glacial features formed when

deposit sand and gravel

one characteristic of glacial movement is that

accumulation and wastage

In a following glacier

uppermost layer is more brittle

a star s thought to be born when

nuclear fusion

which of the following is true of a rock that has the property of paleomagnetism

magnetic poles

according to the whole-mantle model of mantle convection

mantle plumes

which of the following is NOT evidence of sea-floor spreading

ice sheets across the planet

evidence about ancient climates indicate

India and Australia

which of the following statements about soil formation is true?


which of the following is true about stromalites?

precambrian algae

why is radiometric dating on sedimentary rock usually unsuccessful?

form from older rock particles

abyssal plains are very flat features that form when

turbity currents

the continental margins of the pacific ocean are


most oceanic gas hydrates form when

bacteria break down organic matter

index fossils allow geologists to

match rocks of the same age in different regions

the fact that mercury has no atmosphere is evidence that it


which of the following is true about asteroids?

recent impact craters

sinkholes can form when

carbon dioxide

which of the following is NOT a source of meteoroids?

rocky chunks

balance in the water cycle means that

average annual precipitaion equals ammount of water that evaporates

base level is what?

lowest point where a stream can erode its channel

limiting development on floodplains is effective because it what?

absorb floodwaters with little harm

a drainage basin is what?

land that contributes water to a stream

which of the following is one difference between the way terrestrial planets and Jovian planets formed

terrestrials were from metals and silicate minerals

scientists know the universe is expanding because of the

red shift of distant galaxies

according to the information recieved from radio telescopes, where is our sun positioned in our milky way?

within one of the spirals

approximately how long is a lightyear?

9.5 trillion km

the sun can continue to exist in the present stable state for about another?

15.5 billion years

why is chromatic aberration a problem for astronomers?

it weakens the images of stars

which type of spectrum does the radiation from most stars produce

absorption spectrum

a star's spectrum can tell astronomer's

the star's chemical composition

abrasion changes the desert surface by

cutting and polishing

springs form where

water table intersects the ground surface

which of the following results when divergence occurs within the oceanic lithosphere?

seafloor spreading

since humans have been present, the ammount of sediments carried by rivers has?

increased by 2.7

laterite soils contain high ammounts of?

iron oxide

pedalfer soils would be most likely be found

in the eastern half of the unites states

what kind of soil is found in the c horizon of a sol profile

partially weathered parent material

in which of the following areas will soil be greatest?

flat area in a warm, wet climate

the main source of organic matter in soil is?


which of the following weathering process involves the constant freezing and thawing of water?

frost wedging

radio telescopes measure the galaxy's distribution of

hydrogen from which stars are formed

which of the following is NOT a factor that affects the rate of weathering in rocks?


rock features such as the sculpted pinnacles seen in Bryce Canyon National Park are the result of what?

differental weathering

one major tectonic event that characterizes the late carboniferous period is

the formation of the supercontinent pangaea

radiocarbon dating is used to date

75,000 years ago

soil that forms on unconsoildated depsoits is called what?

transported soil

in general, the largest componet of bog soils is what?

organic matter

which of the following areas is NOT one of the three main regions of the ocean floor

continental rock

scientists use satellites to measure the

sea-surface height

what does sonar equipment measure?

the depth of the ocean floor

the densities of the Jovian planets are

not more than about 1.5

which of the following areas does NOT contain major deposits of energy resources

hudson bay

hydrogenous sediment is made up of

minerals that crystallize

from which type of material does biogenous material sediment form

once-living organisms

the principle of fossil succession states that different types of fossil organisms

succeed one another in a definite order

during the cenozoic era, tectonic movement and thus, major geogrpahic formations took place

in western north america

which of the following does NOT occur at a subduction zone?

leading edges are bent downward

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