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Arkansas Grade 8 Science StandardsWeb Resources
NS.1.8.1
Justify conclusions based on appropriate and unbiased observations
NS.1.8.2
Evaluate the merits of empirical evidence based on experimental design:
• hypothesis
• replication
• sample size
• appropriate use of control
• use of standardized independent and dependent variables
NS.1.8.3
Formulate a testable problem using experimental design
NS.1.8.4
Analyze a set of scientific data using mean, median, mode, and range using SI units
NS.1.8.5
Suggest solutions to real world problems by analyzing scientific data in
• data tables/charts
• histograms
• circle graphs
• scatter plots
• stem and leaf plots
• line and double line
• graphs by approximating line of best fit
NS.1.8.6
Formulate inferences based on scientific data
NS.1.8.7
Communicate results and conclusions from scientific inquiry following peer review
NS.1.8.8
Develop and implement strategies for long-term, accurate data collection
NS.1.8.9
Generate questions that can and cannot be answered by science
NS.1.8.10
Explain the role of peer review, evidence, and modification in the development of a theory
NS.1.8.11
Evaluate the merit of hypotheses, laws, and theories
LS.2.8.1
Illustrate the hierarchical relationships of cells, tissues, organs, organ systems, and organisms
LS.2.8.2
Identify different types of single-celled organisms:
• protists
• bacteria
LS.2.8.3
Relate the effect of bacteria on oral health
LS.2.8.4
Describe and illustrate single-celled organisms found in pond water
LS.2.8.5
Use a dichotomous key to classify organisms found in pond water
LS.2.8.6
Compare and contrast characteristics of unicellular organisms and multi-cellular organisms
LS.2.8.7
Classify cells as eukaryotic or prokaryotic
 Prokaryotic & Eukaryotic Cells  Prokaryotic & Eukaryotic Cells
LS.2.8.8
Identify and describe similarities and differences among organisms of different, but closely related taxa (e.g., pine trees, big cats, rodents, ungulates)
LS.2.8.9
Investigate careers, scientists, and historical breakthroughs related to organisms
LS.3.8.1
Identify and explain why inherited characteristics of living things depend on genes
LS.3.8.2
Differentiate between dominant and recessive traits
LS.3.8.3
Observe and classify traits as dominant or recessive:
• tongue rolling
• detached earlobes
• widow's peak
• hitchhiker's thumb
• dimples
• unibrow
LS.3.8.4
Differentiate among observed inherited traits and acquired traits of plants and animals
LS.3.8.5
Interpret simple genetic crosses using Punnett Squares
LS.3.8.6
Predict patterns that emerge from simple genetic crosses
LS.3.8.7
Conduct investigations demonstrating that the phenotype of a genetic trait is the result of genotype
LS.3.8.8
Explain how genetic variation within a species is a result of dominant traits and recessive traits
LS.3.8.9
Compare and contrast patterns of embryological development for all vertebrates, including humans
LS.3.8.10
Distinguish between characteristics of plants and animals through selective breeding
LS.3.8.11
Investigate careers, scientists, and historical breakthroughs related to genetics
LS.3.8.12
Compare the theory of evolution to the characteristics of a scientific theory
LS.3.8.13
Identify basic ideas related to biological evolution:
• diversity of species
• variations within
species
• adaptations
• natural selection
• extinction of a species
LS.3.8.14
Explain that the fossil record provides evidence of life forms'
appearance, diversification, and extinction
LS.3.8.15
Explain the process of natural selection
LS.3.8.16
Identify genetic traits that make organisms more likely to survive and reproduce in a particular environment
LS.3.8.17
Investigate careers, scientists, and historical breakthroughs related to natural selection and the fossil record
LS.4.8.1
Analyze the effect of changes in environmental conditions on the survival of individual organisms and entire species
PS.5.8.1
Compare the atomic theory to the characteristics of a scientific theory
PS.5.8.2
Explain the structure of atoms
PS.5.8.3
Determine the number of protons, neutrons, and electrons in an atom
PS.5.8.4
Create atomic models of common elements
PS.5.8.5
Investigate scientists, careers, and historical breakthroughs related to the atomic theory
PS.6.8.1
Model how motion and forces change Earth's surface:
• compression
• tension
• weathering
• erosion
PS.6.8.2
Conduct investigations demonstrating the field force (lines of force) in magnetic fields
 Holy Cow Magnet
PS.6.8.3
Design and conduct investigations applying variables affecting the strength of an electromagnet
PS.6.8.4
Analyze and compare the relationship between electricity and magnetism
PS.6.8.5
Investigate careers, scientists, and historical breakthroughs related to motion and forces that change Earth's surface
PS.7.8.1
Construct open and closed electrical circuits:
• series circuits
• parallel circuits
PS.7.8.2
Describe and diagram open and closed series and parallel circuits
PS.7.8.3
Compare and contrast open and closed series circuits and parallel circuits
PS.7.8.4
Conduct investigations demonstrating the characteristics of a wave:
• wavelength
• frequency
• speed
• amplitude
 Waves on a Coiled Spring
PS.7.8.5
Conduct investigations of longitudinal and transverse waves to determine how they are different
 Waves on a Coiled Spring
PS.7.8.6
Explain how energy is transferred through waves:
• seismic waves
• sound waves
• water waves
• electromagnetic waves
 How Do Waves Travel?
PS.7.8.7
Describe how waves travel through different kinds of media
 How Do Waves Travel?
PS.7.8.8
Differentiate among reflection, refraction, and absorption of various types of waves
PS.7.8.9
Describe and diagram the electromagnetic spectrum
PS.7.8.10
Analyze the electromagnetic spectrum
 Star Light, Star Bright
PS.7.8.11
Investigate examples of real world uses of the electromagnetic spectrum
 Star Light, Star Bright
PS.7.8.12
Conduct investigations demonstrating the separation of white light into its spectrum using refraction
PS.7.8.13
Compare ways to transfer information:
• sound
• light
• radio
• microwave energy
PS.7.8.14
Investigate careers, scientists, and historical breakthroughs related to waves and the electromagnetic spectrum
ESS.8.8.1
Analyze the causes and predict the consequences of global warming on the following:
• weather
• temperature
• ocean water levels
 Global Warming
ESS.8.8.2
Investigate how global patterns of water currents influence local weather:
• Gulf Stream
• Atlantic Currents
• California Current
ESS.8.8.3
Conduct investigations to compare and contrast different landforms found on Earth:
• mountains
• plateaus
• plains
 Building Landforms
ESS.8.8.4
Synthesize and model the result of both constructive and destructive forces on land forms:
• deposition
• erosion
• weathering
• crustal deformation
 Where Did It Go?  Sedimentation Jars
ESS.8.8.5
Compare and contrast the different landforms caused by Earth's external forces:
• plains
• canyons
• deltas
• valleys
• swamps
 Building Landforms
ESS.8.8.6
Research local, regional, and state landforms created by external forces on Earth:
• Gulf Coastal Plain
• Arkansas River Valley
• Mississippi Alluvial Plain, including the delta region
• Crowley's Ridge
 Show Them What We're Made Of!
ESS.8.8.7
Use topographic maps to identify surface features of Earth
 Building Landforms
ESS.8.8.8
Demonstrate an understanding of the agents of erosion:
• gravity
• water
• ice
• wind
• animals, including humans
ESS.8.8.9
Using models of rivers, predict changes when variables, such as load, slope, amount of water, or the composition of a stream bed, are changed through erosion or deposition
 Where Did It Go?
ESS.8.8.10
Explain how weathering and erosion affect the oceans' salinity
ESS.8.8.11
Investigate careers, scientists, and historical breakthroughs related to external forces that change the Earth
ESS.8.8.12
Investigate the types of weathering involved in the breakdown of organic and inorganic components of Earth's surface
ESS.8.8.13
Illustrate soil profiles
ESS.8.8.14
Apply knowledge of soil profiles to local soil samples
ESS.8.8.15
Investigate the formation of soil types
ESS.8.8.16
Identify components of soil as inorganic or organic through investigations
ESS.8.8.17
Identify the basic nutrients needed by plants that are present in soils:
• nitrogen
• phosphorous
• potassium
ESS.8.8.18
Identify ways plants use organic and inorganic components in the soil
ESS.8.8.19
Investigate and analyze the composition of a variety of soils
ESS.8.8.20
Conduct investigations on soil permeability
ESS.9.8.1
Explain processes that have changed Earth's surface that have resulted from sudden events (e.g., earthquakes and volcanoes) and gradual changes (e.g., uplift, erosion, and weathering)
ESS.9.8.2
Analyze how rock sequences may be disturbed by the following:
• erosion
• deposition
• igneous intrusion
• folding
• faulting
• uplifting
ESS.9.8.3
Explain how scientists determine the relative ages of fossils found in layers of sedimentary rock:
• law of superposition
• law of cross-cutting
ESS.9.8.4
Apply geologic laws of superposition and cross-cutting to determine the relative age of rock in a cross section
ESS.10.8.1
Summarize the effects of gravity on bodies in space
ESS.10.8.2
Identify variables that affect the amount of gravitational force between two objects:
• mass of the objects
• distance between the objects
ESS.10.8.3
Relate the effects of the moon's gravitational force on Earth's ocean tides
ESS.10.8.4
Identify the causes of the following:
• high tides
• low tides
• spring tides
• neap tides
ESS.10.8.5
Define the terms galaxy and universe
ESS.10.8.6
Illustrate the appearance of galaxies as seen through a telescope:
• clarity
• shape
ESS.10.8.7
Compare and contrast the Milky Way Galaxy to other galaxies
ESS.10.8.8
Illustrate the position of our solar system within the Milky Way Galaxy
ESS.10.8.9
Investigate careers, scientists, and historical breakthroughs related to gravity, galaxies, and the universe