Earth History Test 1
Quiz by Lisa Hall
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14 questions
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- Q1Look at the picture to the right. Some students are using acid to test rock samples they collected. Rock A formed bubbles and rock B didn’t. What can students say about the rocks after completing this test?Rock B is harder than rock ARock B could be limestone, and rock A contains calciteRock A could be limestone and rock B does not contain calcite.Rock A contains calcite and is probably shale30s
- Q2Where are large cobbles most likely to be found in a stream?at the top of the streamat the middle of the streamat the bottom of the stream30s
- Q3Where would clay most likely be found in a stream?at the top of the streamat the middle of the streamat the bottom of the stream30s
- Q4Which explanation best describes how a boulder can turn into silt as it moves down a river?Water washes over it until it is silt-sized.It deposits into silt in the basinIt hits other rocks or objects and breaks apart.It moves down the river until it lands in a basin and becomes silt.30s
- Q5What is humus, and how does it form?Humus is rock material in soil that forms when plants and animals eliminate wasteHumus is organic matter in soil that forms when plants and animals decay or eliminate waste.Humus is organic matter in soil that forms when rocks break downHumus is rock material in soil that forms when broken bits of rock wash into the soil.30s
- Q6The Colorado River started eroding the Grand Canyon 6 million years ago. Of the layers shown at Location X, which two layers did the Colorado River erode away first?Bright Angel Shale and Tapeats SandstoneAll layers are eroded at the same time by the Colorado RiverRedwall Limestone and Muav LimestoneKaibab Formation and Toroweap Formation30s
- Q7Explain which layers erode first in the Grand Canyonthe layers in the bottomthe layers at the topthe layers in the middle30s
- Q8A friend dug up two soil samples and forgot to record where they came from. What are several characteristics of soil that you could use to match them to the locations where they were collected?The relative amounts of sand/silt/clay (texture)All of these reasonsamount of organic material (plant roots) and the color of the soilthe amount of moisture30s
- Q9. You nd some soil that is mostly made of clay and silt, but no sand. How might this soil have formed?Slow-moving water carried the sand downstream and left behind the silt and clayMuddy water stood for a while, and the silt and clay settled out.A fast-moving stream dropped sand, silt, and clay in this placeWind blew all the sand away, leaving behind the silt and clay particle30s
- Q10_______________ is a large, nearly level area of land that is higher than the surrounding areacliffplateauhillmountain30s
- Q11Flat deposits of rock that cover a large area are called ________depositssedimentmineralslayers30s
- Q12When geologists work to find a relationship or connection between rock layers from two or more locations, we say that they are making astatementtheoryguesscorrelation30s
- Q13Abrasion and ice wedging are forms of ______________ weatheringchemicalphysical30s
- Q14Clay, sand, silt, and pebbles are all kinds of _________________.rocksmineralssediments30s
