School Improvement in Maryland

Answer Key Science Grade 8 Public Release Items - 2007

MSA Item Number Answer Grade Objectives Assessed
1 C 7 3.A.1.a Provide examples and explain that organisms sorted into groups share similarities in external structures as well as similarities in internal anatomical structures and processes which can be used to infer the degree of relatedness among organisms
/toolkit/vsc/assessment_items/msa_science_7_001.xml
2 C 8 2.D.3.b Recognize and describe that as Earth orbits the sun, the tilt of Earth's axis causes
/toolkit/vsc/assessment_items/msa_science_8_001.xml
3 A 6 6.B.1.b Recognize and describe how environmental change in one part of the world can have consequences for other parts of the world.
/toolkit/vsc/assessment_items/msa_science_6_001.xml
4 A 7 4.A.1.c Provide evidence from the periodic table, investigations and research to demonstrate that elements in the following groups have similar properties.
/toolkit/vsc/assessment_items/msa_science_7_002.xml
5 D 8 4.A.1.a Describe how elements form compounds and molecules.
/toolkit/vsc/assessment_items/msa_science_8_002.xml
6 B 8 4.C.1.b Describe what the temperature of a solid, or a liquid, or a gas reveals about the motion of its atoms and molecules.
/toolkit/vsc/assessment_items/msa_science_8_003.xml
7 8 5.A.1.c Compare accelerated and constant motions using time, distance, and velocity.
/toolkit/vsc/assessment_items/msa_science_8_004.xml
8 C 8 2.E.3.a Identify and describe weather patterns associated with high and low pressure systems and the four frontal systems using appropriate data displays including weather maps.
/toolkit/vsc/assessment_items/msa_science_8_005.xml
9 B 8 2.E.3.a Identify and describe weather patterns associated with high and low pressure systems and the four frontal systems using appropriate data displays including weather maps.
/toolkit/vsc/assessment_items/msa_science_8_006.xml
10 C 8 2.E.1.c Identify and describe how the temperature and precipitation in a geographic area are affected by surface features and changes in atmospheric and ocean content.
/toolkit/vsc/assessment_items/msa_science_8_007.xml
11 D 8 5.A.1.a Observe, describe, and compare the motions of objects using position, speed, velocity, and the direction.
/toolkit/vsc/assessment_items/msa_science_8_008.xml
12 A 8 5.A.1.c Compare accelerated and constant motions using time, distance, and velocity.
/toolkit/vsc/assessment_items/msa_science_8_009.xml
13 A 8 1.A.1.h Use mathematics to interpret and communicate data.
/toolkit/vsc/assessment_items/msa_science_8_010.xml
14 B 6 3.D.1.c Explain that in any particular environment individual organisms with certain traits are more likely than others to survive and have offspring.
/toolkit/vsc/assessment_items/msa_science_6_002.xml
15 C 8 6.B.1.a Based on data from research identify and describe how natural processes change the environment.
/toolkit/vsc/assessment_items/msa_science_8_011.xml
16 A 8 1.B.1.b Explain that what people expect to observe often affects what they actually do observe and that scientists know about this danger to objectivity and take steps to try to avoid it when designing investigations and examining data.
/toolkit/vsc/assessment_items/msa_science_8_012.xml
17 B 8 4.B.1.a Use appropriate tools to gather data and provide evidence that equal volumes of different substances usually have different masses.
/toolkit/vsc/assessment_items/msa_science_8_013.xml
18 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_003.xml
19 C 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_014.xml
20 B 8 1.A.1.e Explain that if more than one variable changes at the same time in an investigation, the outcome of the investigation may not be clearly attributable to any one of the variables.
/toolkit/vsc/assessment_items/msa_science_8_015.xml
21 A 6 5.C.2.a Research and identify various energy sources and the energy transforming devices used to produce electrical energy
/toolkit/vsc/assessment_items/msa_science_6_004.xml
22 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_016.xml
23 C 8 5.A.1.c Compare accelerated and constant motions using time, distance, and velocity.
/toolkit/vsc/assessment_items/msa_science_8_017.xml
24 C 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_018.xml
25 C 7 3.B.1.c Based on research and examples from video technology explain that the repeated division of cells enables organisms to grow and make repairs.
/toolkit/vsc/assessment_items/msa_science_7_003.xml
26 C 6 6.A.1.c Identify and describe how the natural change processes may be affected by human activities.
/toolkit/vsc/assessment_items/msa_science_6_005.xml
27 D 7 6.B.1.b Identify and describe that different individual people or groups of people are affected by an issue in different ways.
/toolkit/vsc/assessment_items/msa_science_7_004.xml
28 A 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_006.xml
29 D 8 1.C.1.e Explain how different models can be used to represent the same thing. What kind of a model to use and how complex it should be depend on its purpose. Choosing a useful model is one of the instances in which intuition and creativity come into play in science, mathematics, and engineering
/toolkit/vsc/assessment_items/msa_science_8_019.xml
30 C 6 6.A.1.d Identify and describe problems associated with obtaining, using, and distributing natural resources.
/toolkit/vsc/assessment_items/msa_science_6_007.xml
31 A 7 3.C.1.a Investigate and explain that in some kinds of organisms, all the genes come from a single parent, whereas in organisms that have sexes, typically half of the genes come from each parent.
/toolkit/vsc/assessment_items/msa_science_7_005.xml
32 C 6 3.F.1.a Explain that populations increase or decrease relative to the availability of resources and the conditions of the environment.
/toolkit/vsc/assessment_items/msa_science_6_008.xml
33 B 6 3.F.1.a Explain that populations increase or decrease relative to the availability of resources and the conditions of the environment.
/toolkit/vsc/assessment_items/msa_science_6_009.xml
34 C 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_033.xml
35 C 6 4.D.1.b Based on data gathered, identify and describe various processes used to separate mixtures.
/toolkit/vsc/assessment_items/msa_science_6_011.xml
36 A 7 3.E.1.c Investigate and describe the processes that enable plants to use the energy from light to make sugars (food) from carbon dioxide and water.
/toolkit/vsc/assessment_items/msa_science_7_006.xml
37 B 6 5.D.1.b Measure and describe the wavelength, frequency, and amplitude of waves using:
/toolkit/vsc/assessment_items/msa_science_6_012.xml
38 C 6 5.D.1.c Measure and describe the relationship between the frequency and the wavelength of a wave.
/toolkit/vsc/assessment_items/msa_science_6_013.xml
39 B 6 5.D.1.c Measure and describe the relationship between the frequency and the wavelength of a wave.
/toolkit/vsc/assessment_items/msa_science_6_014.xml
40 6 3.D.1.b Explain that in all environments-freshwater, marine, forest, desert, grassland, mountain, and others-organisms with similar needs may compete with one another for resources, including food, space, water, air, and shelter.
/toolkit/vsc/assessment_items/msa_science_6_015.xml
41 B 6 4.C.1.c Analyze data gathered and formulate a conclusion on the effects of temperature change on most substances.
/toolkit/vsc/assessment_items/msa_science_6_016.xml
42 D 8 2.E.3.b Identify and describe the atmospheric and hydrospheric conditions associated with the formation and development of hurricanes, tornadoes, and thunderstorms.
/toolkit/vsc/assessment_items/msa_science_8_020.xml
43 B 8 6.B.1.b Identify and describe how human activities produce changes in natural processes:
/toolkit/vsc/assessment_items/msa_science_8_021.xml
44 B 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_007.xml
45 C 6 6.B.1.a Identify and describe a range of local issues that have an impact on people in other places.
/toolkit/vsc/assessment_items/msa_science_6_017.xml
46 B 8 4.A.1.c Based on data from investigations and research compare the properties of compounds with those of the elements from which they are made.
/toolkit/vsc/assessment_items/msa_science_8_022.xml
47 D 6 5.C.3.b Investigate and explain ways to change the strength of a simple electromagnet by varying the number of coils wrapped, the amount of electricity in the wire, the number of batteries used, and whether or not an iron core is used.
/toolkit/vsc/assessment_items/msa_science_6_018.xml
48 D 8 4.D.2.b Use information gathered from investigations using indicators and the pH scale to classify materials as acidic, basic, or neutral.
/toolkit/vsc/assessment_items/msa_science_8_023.xml
49 D 8 1.B.1.d Describe the reasoning that lead to the interpretation of data and conclusions drawn.
/toolkit/vsc/assessment_items/msa_science_8_024.xml
50 C 8 6.B.1.b Identify and describe how human activities produce changes in natural processes:
/toolkit/vsc/assessment_items/msa_science_8_025.xml
51 B 8 6.B.1.b Identify and describe how human activities produce changes in natural processes:
/toolkit/vsc/assessment_items/msa_science_8_026.xml
52 B 7 3.C.1.e Identify evidence to support the idea that there is greater variation among offspring of organisms that reproduce sexually than among those that reproduce asexually.
/toolkit/vsc/assessment_items/msa_science_7_008.xml
53 A 8 1.B.1.a Verify the idea that there is no fixed set of steps all scientists follow, scientific investigations usually involve the collection of relevant evidence, the use of logical reasoning, and the application of imagination in devising hypotheses and explanations to make sense of the collected evidence.
/toolkit/vsc/assessment_items/msa_science_8_027.xml
54 C 7 4.A.1.e Cite evidence to explain that all living and non-living things can be broken down into elements.
/toolkit/vsc/assessment_items/msa_science_7_009.xml
55 B 6 6.B.1.c Identify and describe that ecosystems can be impacted by human activities.
/toolkit/vsc/assessment_items/msa_science_6_019.xml
56 B 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_020.xml
57 D 8 2.B.1.b Cite evidence to confirm that thousands of layers of sedimentary rock reveal the long history of the changing surface of the Earth.
/toolkit/vsc/assessment_items/msa_science_8_028.xml
58 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_021.xml
59 D 8 2.D.2.c Identify and explain the cause of the phases of the moon.
/toolkit/vsc/assessment_items/msa_science_8_029.xml
60 D 7 3.C.1.b Investigate and explain that in sexual reproduction, a single specialized cell from a female (egg) merges with a specialized cell from a male (sperm) and the fertilized egg now has genetic information from each parent, that multiplies to form the complete organism composed of about a trillion cells, each of which contains the same genetic information.
/toolkit/vsc/assessment_items/msa_science_7_010.xml
61 B 8 1.A.1.c Explain and provide examples that all hypotheses are valuable, even if they turn out not to be true, if they lead to fruitful investigations.
/toolkit/vsc/assessment_items/msa_science_8_030.xml
62 A 6 4.D.1.a Investigate and identify ways to describe and classify mixtures using the observable and measurable properties of their components.
/toolkit/vsc/assessment_items/msa_science_6_022.xml
63 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_031.xml
64 C 8 4.C.1.b Describe what the temperature of a solid, or a liquid, or a gas reveals about the motion of its atoms and molecules.
/toolkit/vsc/assessment_items/msa_science_8_032.xml