Arizona Science Standards — Grade 8


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8.ESS1

No performance objectives at this grade level

8.ESS2

No performance objectives at this grade level

8.ESS3

No performance objectives at this grade level

8.HNS1.1

Identify how diverse people and/or cultures, past and present, have made important contributions to scientific innovations (e.g., Watson and Crick [scientists], support Strand 4; Rosalind FranK.Lin [scientist], supports Strand 4; Charles Darwin [scientist], supports Strand 4; George Washington Carver [scientist, inventor], supports Strand 4; Joseph Priestley [scientist], supports Strand 5; Sir Frances Bacon [philosopher], supports Strand 5; Isaac Newton [scientist], supports Strand 5).

8.HNS1.2

Evaluate the effects of the following major scientific milestones on society: Mendelian Genetics Newtons Laws

8.HNS1.3

Evaluate the impact of a major scientific development occurring within the past decade.

8.HNS1.4

Evaluate career opportunities related to life and physical sciences.

8.HNS2.1

Apply the following scientific processes to other problem solving or decision maK.Ing situations: observing questioning communicating comparing measuring classifying predicting organizing data inferring generating hypotheses identifying variables

8.HNS2.2

Describe how scientific knowledge is subject to change as new information and/or technology challenges prevailing theories.

8.HNS2.3

Defend the principle that accurate record K.Eeping, openness, and replication are essential for maintaining an investigators credibility with other scientists and society.

8.HNS2.4

Explain why scientific claims may be questionable if based on very small samples of data, biased samples, or samples for which there was no control.

8.IP1.1

Formulate questions based on observations that lead to the development of a hypothesis. (See M08-S2C1-01)

8.IP1.2

Use appropriate research information, not limited to a single source, to use in the development of a testable hypothesis. (See W08-S3C6-01, R08-S3C1-06, and R08-S3C2-03)

8.IP1.3

Generate a hypothesis that can be tested.

8.IP2.1

Demonstrate safe behavior and appropriate procedures (e.g., use and care of technology, materials, organisms) in all science inquiry.

8.IP2.2

Design a controlled investigation to support or reject a hypothesis.

8.IP2.3

Conduct a controlled investigation to support or reject a hypothesis.

8.IP2.4

Perform measurements using appropriate scientific tools (e.g., balances, microscopes, probes, micrometers)

8.IP2.5

K.Eep a record of observations, notes, sK.Etches, questions, and ideas using tools such as written and/or computer logs. (See W08-S3C2-01 and W08-S3C3-01)

8.IP3.1

Analyze data obtained in a scientific investigation to identify trends. (See M08-S2C1-08)

8.IP3.2

Form a logical argument about a correlation between variables or sequence of events (e.g., construct a causeand-effect chain that explains a sequence of events).

8.IP3.3

Interpret data that show a variety of possible relationships between two variables, including: positive relationship negative relationship no relationship

8.IP3.4

Formulate a future investigation based on the data collected.

8.IP3.5

Explain how evidence supports the validity and reliability of a conclusion.

8.IP3.6

Identify the potential investigational error that may occur (e.g., flawed investigational design, inaccurate measurement, computational errors, unethical reporting).

8.IP3.7

Critique scientific reports from periodicals, television, or other media.

8.IP3.8

Formulate new questions based on the results of a previous investigation.

8.IP4.1

Communicate the results of an investigation.

8.IP4.2

Choose an appropriate graphic representation for collected data: line graph double bar graph stem and leaf plot histogram (See M08-S2C1-03)

8.IP4.3

Present analyses and conclusions in clear, concise formats. (See W08-S3C6-02)

8.IP4.4

Write clear, step-by-step instructions for conducting investigations or operating equipment (without the use of personal pronouns). (See W08-S3C3-01)

8.IP4.5

Communicate the results and conclusion of the investigation. (See W08-S3C6-02)

8.LS1

No performance objectives at this grade level

8.LS2.1

Explain the purposes of cell division: growth and repair reproduction

8.LS2.2

Explain the basic principles of heredity using the human examples of: eye color widows peak blood type

8.LS2.3

Distinguish between the nature of dominant and recessive traits in humans.

8.LS3

No performance objectives at this grade level

8.LS4.1

Explain how an organisms behavior allows it to survive in an environment.

8.LS4.2

Describe how an organism can maintain a stable internal environment while living in a constantly changing external environment.

8.LS4.3

Determine characteristics of organisms that could change over several generations.

8.LS4.4

Compare the symbiotic and competitive relationships in organisms within an ecosystem (e.g., lichen, mistletoe/tree, clownfish/sea anemone, native/non-native species).

8.LS4.5

Analyze the following behavioral cycles of organisms: hibernation migration dormancy (plants)

8.LS4.6

Describe the following factors that allow for the survival of living organisms: protective coloration beak design seed dispersal pollination

8.PS1.1

Identify different K.Inds of matter based on the following physical properties: states density boiling point melting point solubility

8.PS1.2

Identify different K.Inds of matter based on the following chemical properties: reactivity pH oxidation (corrosion)

8.PS1.3

Identify the following types of evidence that a chemical reaction has occurred: formation of a precipitate generation of gas color change absorption or release of heat

8.PS1.4

Classify matter in terms of elements, compounds, or mixtures.

8.PS1.5

Classify mixtures as being homogeneous or heterogeneous.

8.PS1.6

Explain the systematic organization of the periodic table.

8.PS1.7

Investigate how the transfer of energy can affect the physical and chemical properties of matter.

8.PS2.1

Demonstrate velocity as the rate of change of position over time.

8.PS2.2

Identify the conditions under which an object will continue in its state of motion (Newtons 1st Law of Motion).

8.PS2.3

Describe how the acceleration of a body is dependent on its mass and the net applied force (Newtons 2nd Law of Motion).

8.PS2.4

Describe forces as interactions between bodies (Newtons 3rd Law of Motion).

8.PS2.5

Create a graph devised from measurements of moving objects and their interactions, including: position-time graphs velocity-time graphs

8.PS3

No performance objectives at this grade level

8.SP1.1

Analyze the risk factors associated with natural, human induced, and/or biological hazards, including: waste disposal of industrial chemicals greenhouse gases

8.SP1.2

Analyze possible solutions to address the environmental risK.S associated with chemicals and biological systems.

8.SP2.1

Propose viable methods of responding to an identified need or problem.

8.SP2.2

Compare solutions to best address an identified need or problem. PO 3. Design and construct a solution to an identified need or problem using

8.SP2.3

Design and construct a solution to an identified need or problem using simple classroom materials

8.SP2.4

Compare risK.S and benefits of the following technological advances: radiation treatments genetic engineering (See Strand 4 Concept 2) airbags (See Strand 5 Concept 2)