School Improvement in Maryland

Answer Key Science Grade 8 Public Release Items - 2010

MSA Item Number Answer Grade Objectives Assessed
1 A 6 5.C.2.b Cite examples that demonstrate the transformation of electrical energy into other forms of energy.
/toolkit/vsc/assessment_items/msa_science_6_088.xml
2 B 8 4.D.3.a Investigate and describe the occurrence of chemical reactions using the following evidence:
  • Color change
  • Formation of a precipitate or gas
  • Release of heat or light
/toolkit/vsc/assessment_items/msa_science_8_101.xml
3 C 8 3.D.1.b Recognize that adaptations may include variations in structures, behaviors, or physiology, such as spiny leaves on a cactus, birdcalls, and antibiotic resistant bacteria.
/toolkit/vsc/assessment_items/msa_science_8_102.xml
4 8 3.D.1.b Recognize that adaptations may include variations in structures, behaviors, or physiology, such as spiny leaves on a cactus, birdcalls, and antibiotic resistant bacteria.
/toolkit/vsc/assessment_items/msa_science_8_103.xml
5 D 8 2.D.2.a Identify and describe the relationships among the period of revolution of a planet, the length of its solar year, and its distance from the sun.
/toolkit/vsc/assessment_items/msa_science_8_104.xml
6 D 8 2.D.2.b Identify and explain the relationship between the rotation of a planet or moon on its axis and the length of the solar day for that celestial object.
/toolkit/vsc/assessment_items/msa_science_8_105.xml
7 A 8 2.D.3.b Recognize and describe that as Earth orbits the sun, the tilt of Earth's axis causes
  • Changes in the angle of the sun in the sky during the year
  • Seasonal differences in the northern and southern latitudes
/toolkit/vsc/assessment_items/msa_science_8_106.xml
8 C 7 3.A.1.c Use analogies, models, or drawings to represent that animals and plants have a great variety of body plans and internal structures that define the way they live, grow, survive, and reproduce.
/toolkit/vsc/assessment_items/msa_science_7_032.xml
9 C 8 6.B.1.a Based on data from research identify and describe how natural processes change the environment.
  • Cyclic climate change
  • Sedimentation in watersheds
  • Population cycles
  • Extinction
/toolkit/vsc/assessment_items/msa_science_8_107.xml
10 B 8 6.B.1.b Identify and describe how human activities produce changes in natural processes:
  • Climate change
  • Loss of habitat due to construction
  • Hunting and fishing
  • Introduction of nonnative species
  • Cycling of matter
/toolkit/vsc/assessment_items/msa_science_8_108.xml
11 A 8 1.C.1.b Interpret tables and graphs produced by others and describe in words the relationships they show.
/toolkit/vsc/assessment_items/msa_science_8_109.xml
12 C 6 2.C.2.b Recognize and explain that major geologic events (earthquakes, volcanic activity, sea floor spreading) occur along crustal plate boundaries.
/toolkit/vsc/assessment_items/msa_science_6_089.xml
13 A 8 1.C.1.a Organize and present data in tables and graphs and identify relationships they reveal.
/toolkit/vsc/assessment_items/msa_science_8_110.xml
14 D 8 1.C.1.b Interpret tables and graphs produced by others and describe in words the relationships they show.
/toolkit/vsc/assessment_items/msa_science_8_111.xml
15 D 8 1.A.1.g Give reasons for the importance of waiting until an investigation has been repeated many times before accepting the results as correct.
/toolkit/vsc/assessment_items/msa_science_8_112.xml
16 A 6 3.F.1.c Explain that within any environment organisms with similar needs may compete with one another for resources.
/toolkit/vsc/assessment_items/msa_science_6_090.xml
17 B 8 5.A.2.b Demonstrate and explain, through a variety of examples, that moving objects will stay in motion at the same speed and in the same direction unless acted on by an unbalanced force.
/toolkit/vsc/assessment_items/msa_science_8_113.xml
18 A 7 3.B.2.a Describe and explain that the complex set of systems found in multicellular organisms are made up of different kinds of tissues and organs which are themselves composed of differentiated cells.
/toolkit/vsc/assessment_items/msa_science_7_033.xml
19 D 8 4.A.1.a Describe how elements form compounds and molecules.
/toolkit/vsc/assessment_items/msa_science_8_114.xml
20 D 8 4.B.1.c Give reasons to justify the statement, "If the number of atoms stays the same no matter how the same atoms are rearranged, then their total mass stays the same."
/toolkit/vsc/assessment_items/msa_science_8_115.xml
21 8 5.A.1.c Compare accelerated and constant motions using time, distance, and velocity.
/toolkit/vsc/assessment_items/msa_science_8_116.xml
22 B 7 6.B.1.a Identify and describe a local, regional, or global environmental issue.
/toolkit/vsc/assessment_items/msa_science_7_034.xml
23 C 8 2.D.3.b Recognize and describe that as Earth orbits the sun, the tilt of Earth's axis causes
  • Changes in the angle of the sun in the sky during the year
  • Seasonal differences in the northern and southern latitudes
/toolkit/vsc/assessment_items/msa_science_8_117.xml
24 A 6 2.D.1.c Identify and describe the general pattern of movement of all objects in our solar system.
/toolkit/vsc/assessment_items/msa_science_6_091.xml
25 D 8 2.D.2.a Identify and describe the relationships among the period of revolution of a planet, the length of its solar year, and its distance from the sun.
/toolkit/vsc/assessment_items/msa_science_8_118.xml
26 C 6 6.A.1.e Identify possible solutions to problems associated with obtaining, using, and distributing natural resources.
/toolkit/vsc/assessment_items/msa_science_6_092.xml
27 A 8 1.B.1.e Question claims based on vague statements or on statements made by people outside their area of expertise.
/toolkit/vsc/assessment_items/msa_science_8_119.xml
28 B 6 6.A.1.c Identify and describe how the natural change processes may be affected by human activities.
  • Agriculture
  • Beach Preservation
  • Mining
  • Development/construction
  • Stream/river alteration
/toolkit/vsc/assessment_items/msa_science_6_093.xml
29 D 6 2.A.4.d Cite features that can be used as evidence to distinguish among the three types of rocks and relate these features to the processes that form each rock type.
/toolkit/vsc/assessment_items/msa_science_6_094.xml
30 D 8 3.D.1.b Recognize that adaptations may include variations in structures, behaviors, or physiology, such as spiny leaves on a cactus, birdcalls, and antibiotic resistant bacteria.
/toolkit/vsc/assessment_items/msa_science_8_120.xml
31 8 1.A.1.a Explain that scientists differ greatly in what phenomena they study and how they go about their work.
/toolkit/vsc/assessment_items/msa_science_8_121.xml
32 D 6 6.B.1.c Identify and describe that ecosystems can be impacted by human activities.
  • Protection of the Chesapeake Bay watershed
  • Resource acquisition and use
  • Land use decisions (agriculture, mining, and development)
  • Recycling
  • Use and disposal of toxic substances
/toolkit/vsc/assessment_items/msa_science_6_095.xml
33 A 6 5.D.1.a Cite examples to show that waves transfer energy from one place to another.
  • Light
  • Sound
  • Earthquake waves
/toolkit/vsc/assessment_items/msa_science_6_096.xml
34 B 7 3.B.2.b Select several body systems and explain the role of cells, tissues and organs that effectively carry out a vital function for the organism, such as
  • Obtaining food and providing energy (digestive, circulatory, respiratory)
  • Defense (nervous, endocrine, circulatory, muscular, skeletal, immune)
  • Reproduction (reproductive, endocrine, circulatory)
  • Waste removal (excretory, respiratory, circulatory)
  • Breathing (respiratory, circulatory)
/toolkit/vsc/assessment_items/msa_science_7_035.xml
35 A 8 5.B.1.a Based on observable phenomena, identify and describe examples of heat being transferred through conduction and through convection.
/toolkit/vsc/assessment_items/msa_science_8_122.xml
36 C 8 5.B.1.b Based on observable phenomena, identify examples to illustrate that radiation does not require matter to transfer heat energy.
/toolkit/vsc/assessment_items/msa_science_8_123.xml
37 A 8 5.B.2.a Identify and describe the various forms of energy that are transformed in order for systems (living and non-living) to operate.
  • Chemical - Flashlight battery-Light
  • Mechanical - Pulleys-Motion
  • Solar/Radiant - Solar calculator
  • Chemical - Plant cells
/toolkit/vsc/assessment_items/msa_science_8_124.xml
38 D 8 6.B.1.b Identify and describe how human activities produce changes in natural processes:
  • Climate change
  • Loss of habitat due to construction
  • Hunting and fishing
  • Introduction of nonnative species
  • Cycling of matter
/toolkit/vsc/assessment_items/msa_science_8_125.xml
39 C 7 6.A.1.a Based on data identify and describe the positive and negative impacts of an increasing human population on the use of natural resources
/toolkit/vsc/assessment_items/msa_science_7_036.xml
40 C 6 4.D.1.b Based on data gathered, identify and describe various processes used to separate mixtures.
  • Filtration
  • Evaporation
  • Paper Chromatography
/toolkit/vsc/assessment_items/msa_science_6_097.xml
41 D 8 4.D.3.a Investigate and describe the occurrence of chemical reactions using the following evidence:
  • Color change
  • Formation of a precipitate or gas
  • Release of heat or light
/toolkit/vsc/assessment_items/msa_science_8_126.xml
42 8 4.B.1.c Give reasons to justify the statement, "If the number of atoms stays the same no matter how the same atoms are rearranged, then their total mass stays the same."
/toolkit/vsc/assessment_items/msa_science_8_127.xml
43 B 8 6.B.1.b Identify and describe how human activities produce changes in natural processes:
  • Climate change
  • Loss of habitat due to construction
  • Hunting and fishing
  • Introduction of nonnative species
  • Cycling of matter
/toolkit/vsc/assessment_items/msa_science_8_128.xml
44 D 6 2.C.1.b Recognize and describe that the Earth's core
  • Is at the center of the Earth
  • Is very hot
  • Is dense and metallic
/toolkit/vsc/assessment_items/msa_science_6_098.xml