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ITEM SAMPLERS ARE NOT SECURE TESTMATERIALS. THIS ITEM SAMPLER TEST BOOK
MAY BE COPIED OR DUPLICATED.
Minnesota Comprehensive Assessments-Series III
24 Point
Science Item SamplerGrade 8
State of Minnesota© Copyright Minnesota Department of Education
Roseville, MN 55113-4266
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Science TestGeneral Directions
• This test contains two segments.
• You may write in this test book or use scratchpaper.
• All answers must be marked in this test book.
• This test has four kinds of questions.
• Answer each multiple-choice question bycircling your answer. The sample below showshow to do this.
Sample Question Answered in Test Book:
A. Apply fertilizer right before planting
What should a farmer do to prevent too muchfertilizer from being put on a field?
B. Apply fertilizer and water at the sametime
C. Measure the ammount of minerals thesoil needs
D. Measure the amount of water in thesoil
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• For some diagram questions, you will need towrite the label letters (A, B, C, etc.) in theboxes. The sample below shows how to do this.
Sample Question Answered in Test Book:
This diagram shows the process of photosynthesis.Identify the parts of the photosynthesis process involved in this ecosystem.
Each word is labeled A, B, C, D, E, or F. Write the letter of the correct word in each empty box. Four of the words will be used.
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• For some diagram questions, you will need tocircle the word you want to select as youranswer. The samples below show how to do this.
Sample Question Answered in Test Book:
Two characteristics of pintial ducks are listed. Identify the characteristics that are the same and different in pintail ducks.
On the diagram, circle the word you want to select. You may only circle 1 word for Same and 1 word for Different.
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• For some graphing equations, you will need towrite a “+” above each bar, where the top of the bar should be. The sample below shows how to do this.
Sample Question Answered in Test Book:
Choose 2 different adaptations that make this duck more suited to feed on water plants than other kinds of birds.
On the diagram, circle the 2 adaptations. You may only circle 2 adaptations.
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Sample Question Answered in Test Book:
Read the water level in the beakers. Make a graphof this data.
Write a “+” above each bar where the top of the bar should be.
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• When you finish a segment of the test, stop and check your answers. Then use the stickergiven to you to seal it. Once you seal a segment, you cannot go back to it. Eachsegment must be sealed before you move on to the next segment.
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On this test, do your own best work to show whatyou know and can do.
• Do not accept help finding answers to testquestions.
• Do not give answers to other students.
• Do not tell others what is on the test.
• There may be consequences if you do notfollow directions or if you behave dishonestly.
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Segment 1You will be told when to beginthis segment.
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1Science Test – Segment 1
LakeSuperior
ITEM SAMPLER. MAY BE DUPLICATED.
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ITEM SAMPLER. MAY BE DUPLICATED.
About 10,000 years ago, the last glaciers meltedaround the Lake Superior area and filled the lakewith water. For the past few hundred years,agricultural and manufacturing developments havecaused pollution in the lake.
Wisconsin
Minnesota
Michigan
LakeSuperior
Ontario
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ITEM SAMPLER. MAY BE DUPLICATED.
1. Which observation suggests that Minnesota wascovered by glaciers in the past?
A.
B.
C.
D.
Rocks have fossils.
Rocks show wind erosion.
Rocks show chemical weathering.
Rocks have scrapes and striations.
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1
ITEM SAMPLER. MAY BE DUPLICATED.
To learn more about the pollution in Lake Superior,scientists travel in a boat to collect samples fromdifferent areas of the lake. Before going out on thelake, the scientists must study the local weather inorder to safely travel on the lake.
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1
ITEM SAMPLER. MAY BE DUPLICATED.
2. Based on the air pressure data, which 2 weatherpredictions will most likely be accurate?
Circle the 2 weather predictions you want toselect.
Time of Day Air Pressure(millibars)
6 a.m. 978
Noon 1,010
6 p.m. 1,010
Midnight 1,010
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1
ITEM SAMPLER. MAY BE DUPLICATED.
Weather Predictions
Stratusclouds
Heavyrain
Cirrusclouds
Strongwinds
Fairweather
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ITEM SAMPLER. MAY BE DUPLICATED.
The scientists on the boat discover many pollutantsin the lake sediment.
Sedimentsample
Sedimentsample
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1
ITEM SAMPLER. MAY BE DUPLICATED.
Pollutants Found in Lake
Superior Sediments
Arsenic
Cadmium
Chromium
Copper
Lead
Mercury
Pesticides
Zinc
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1
ITEM SAMPLER. MAY BE DUPLICATED.
3. Based on the data collected, which testablequestion are the scientists trying to answer?
A.
B.
C.
D.
What is the source of the pollution?
Which pollutants are found in the lake?
Which pollutants have been in the water thelongest?
What effect does the pollution have on thelake ecosystem?
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1
ITEM SAMPLER. MAY BE DUPLICATED.
Mercury is 1 pollutant found in Lake Superior. Thelargest source of mercury pollution comes fromburning coal in power plants. Data shows that aircurrents can carry pollutants from power plants thatare hundreds of miles away.
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1
ITEM SAMPLER. MAY BE DUPLICATED.
4. Show how these factors would most likelychange if people began to use less energy.
Each change is labeled A, B, C, D, E, or F. Writethe letter of the correct change into each box.You may use each letter 1 time. Three of thelabels will be used.
Amount ofMercuryReleased
Changes When Less Energy is Used
decreases
increases
C.
Amount ofCoal Burned
decreases
increases
A.
B. D.
Condition ofthe Lake
declines
improves
E.
F.
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Segment 2You will be told when to beginthis segment.
Put
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2
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2
Science Test – Segment 2
Pea PlantExperiment
ITEM SAMPLER. MAY BE DUPLICATED.
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2
ITEM SAMPLER. MAY BE DUPLICATED.
A student plants pea seeds in containers. Eachcontainer has the same type of soil and receives thesame amounts of water and light. The pea seedsgrow into mature plants.
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2
ITEM SAMPLER. MAY BE DUPLICATED.
5. What 2 substances do plants take in to makesugars during photosynthesis?
A.
B.
C.
D.
Soil and light
Water and oxygen
Soil and carbon dioxide
Water and carbon dioxide
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2
ITEM SAMPLER. MAY BE DUPLICATED.
The student collects the seeds from the mature peaplants. Some of the seeds are green and some areyellow. The student records the data about seed colorin a table.
Number of Pea Seeds
Green245
255YellowGreenYellow
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2
ITEM SAMPLER. MAY BE DUPLICATED.
6. Which graph best shows the information fromthe table?
A.
B.
Pea Seeds
Greencolor255
Yellowcolor245
Pea Seeds
Color of Seeds
Nu
mb
er
of
Seed
s 255245235
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2
ITEM SAMPLER. MAY BE DUPLICATED.
C.
Pea Seeds
Yellowcolor255
Greencolor245
D.
Pea Seeds
Number of Seeds
Co
lor
of
Seed
s
255245235
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2
ITEM SAMPLER. MAY BE DUPLICATED.
7. Reproduction is important for a species tosurvive. Select one factor that might affect aspecies. Then select the most likely outcome ofthat factor.
Each factor is labeled A, B, or C, and eachoutcome is labeled D, E, or F. Write the letter ofthe correct factor and the outcome into eachempty box. Use one letter for the factor and oneletter for the outcome.
negative changein environment
small numberof organisms
large amount ofgenetic diversity
Factor
no chance ofspecies survival
increased chance ofspecies survival
decreased chance ofspecies survival
Outcome
A.
B.
C.
D.
E.
F.
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2
ITEM SAMPLER. MAY BE DUPLICATED.
The student uses yellow pea seeds for a differentexperiment. The student divides these seeds into 2 groups. One group of yellow pea seeds receiveshalf as much water as the other group. After 1 month, the group of plants that received less wateris shorter than the other group of plants.
Less waterMore water
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2
ITEM SAMPLER. MAY BE DUPLICATED.
8. Several types of variables are found in thisexperiment. Identify each of the 4 variablesshown as changed, measured, or kept the same.
Each variable is labeled A, B, C, or D. Write theletter of the correct variable or variables in eachempty box. Use each letter 1 time.
Variable(s)Changed
Variable(s)Measured
Variable(s)Kept the
Same
Pea Plant Experiment
Size ofcontainer
Amountof light
Height ofplant
Amountof water
Amountof water
A.
Amountof light
B.
Height ofplant
C.
Size ofcontainer
D.
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2Satellites
ITEM SAMPLER. MAY BE DUPLICATED.
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2
ITEM SAMPLER. MAY BE DUPLICATED.
Satellites are natural or artificial objects that orbit aplanet or star. The Moon and Earth are both naturalsatellites. For thousands of years, humans have usednatural satellites and stars to determine the time ofday and predict the change of the seasons.
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2
ITEM SAMPLER. MAY BE DUPLICATED.
9. Satellites move in regular, predictable patterns.Identify which 2 properties keep satellitesmoving in regular, predictable patterns.
Circle 2 properties you want to select.
Properties
Density
Friction
Gravity
Inertia
Magnetism
Speed
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2
ITEM SAMPLER. MAY BE DUPLICATED.
The first artificial satellite, Sputnik, was launched in1957. Since then, many other countries, includingthe United States, have launched artificial satellites.These satellites are powered by an energy sourcesuch as batteries or the Sun.
Sputnik
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2
ITEM SAMPLER. MAY BE DUPLICATED.
Modern Artificial Satellite
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ITEM SAMPLER. MAY BE DUPLICATED.
10. Scientists use rockets to launch satellites fromEarth. Identify which energy types are involvedin launching a rocket.
Each energy type is labeled A, B, C, or D. Writethe letter of the correct energy type in eachempty box. Three of the energy types will beused.
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2
ITEM SAMPLER. MAY BE DUPLICATED.
Launching a Rocket
Energy ofmoving rocket
Energy stored infuel cells
Energy releasedinto atmosphere
Energy Types
A.
B.
C.
D. mechanical
electrical
heat
chemical
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2
ITEM SAMPLER. MAY BE DUPLICATED.
Scientific research also uses artificial satellites.Scientists use images from satellites to observechanges in the sizes of glaciers.
Satellite Image of Glacier, 1960
= Glacier
= Land
= Water
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2
ITEM SAMPLER. MAY BE DUPLICATED.
Satellite Image of Glacier, 1980
= Glacier
= Land
= Water
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2
ITEM SAMPLER. MAY BE DUPLICATED.
Satellite Image of Glacier, 2000
= Glacier
= Land
= Water
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2
ITEM SAMPLER. MAY BE DUPLICATED.
11. The glacier in the satellite image appears whiteand the land appears brown. Which statementexplains why objects appear to be differentcolors?
A.
B.
C.
D.
Objects reflect all wavelengths of light.
Objects refract all wavelengths of light.
Objects reflect some wavelengths of lightand absorb others.
Objects refract some wavelengths of lightand absorb others.
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2
ITEM SAMPLER. MAY BE DUPLICATED.
12. As the glacier melts, the volume of water in thelake near the glacier increases. Every 3 squarekilometers of ice that melts adds 1,000,000 litersof water to the lake.
Assume the glacier melts at the same ratethrough 2020. Graph the volume of water in thelake from 1980 to 2020.
You can use the calculator to help you answerthis question.
Write a “+” above each bar where the top of thebar should be.
Glacier Size Over Time
Year 1960 1980 2000
Area(km2) 9 6 3
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2
ITEM SAMPLER. MAY BE DUPLICATED.
22201816141210864
Lake Water Volume
Year
Vo
lum
e (
mil
lio
ns
of
L)
1960 1980 2000 2020
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2
ITEM SAMPLER. MAY BE DUPLICATED.
Communication is a common use of artificialsatellites. They receive and send electromagneticwaves to transmit radio, telephone, and televisionsignals.
Artificial satellite
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2
ITEM SAMPLER. MAY BE DUPLICATED.
13. Internet services use satellite signals. People canuse the Internet in homes to replace some oldertechnologies. Identify which items people canreplace by using the Internet.
Circle the names of the items you want to select.
Items
Refrigerator
Stove
BooksLamp
Newspapers
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2
ITEM SAMPLER. MAY BE DUPLICATED.
14. Which statement describes why sound wavescannot travel beyond Earth’s atmosphere to thesatellites?
A.
B.
C.
D.
Sound waves need light to move.
Sound waves cannot travel in air.
Sound waves need particles to move.
Sound waves cannot travel fast enough.
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The global positioning system, known as GPS, usesartificial satellites. People can use a GPS device toget directions to a location.
ITEM SAMPLER. MAY BE DUPLICATED.
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2
15. A compass and a GPS device have similarfeatures and different features. Identify whichfeatures are similar and which are different.
Each feature is labeled A, B, C, or D. Write theletter of each feature in the correct box. You willuse each letter 1 time.
Compass GPS device
Similar Different
A.
Shows which
directionis north
Cost
B.
Number offunctions
C.
Includes amap
D.
Go on to the next page.ITEM SAMPLER. MAY BE DUPLICATED.
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Grade 8
24 point
1106191 ISD155601 2 3 4 5 A B C D E Printed in the USA
Science Item Sampler
ITEM SAMPLERS ARE NOT SECURE TESTMATERIALS. THIS ITEM SAMPLER TESTBOOK MAY BE COPIED OR DUPLICATED.
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