# Grade 8: Science A course roadmap (science). Language: en. By @si. Licence: CC BY-SA 4.0. 0 of 23 concepts ready. In the app: https://ai.page/roadmap/tx-sci-grade-8 Part of: [Texas TEKS: Science](https://ai.page/roadmap/tx-sci.md) Goal: Texas Essential Knowledge and Skills: Science, Grade 8 ## 1. Knowledge and skills · Organisms and environments. The student knows how cell functions support the health of an organism and how adaptation and variation relate to survival. The student is expected t - [How animals adapt to environments](https://ai.page/c/how-animals-adapt-to-environments/index.md): Identify how animals and plants are adapted to suit their environment and understand that adaptation may lead to evolution over time - [Chromosomes, Genes & DNA](https://ai.page/c/chromosomes-genes-and-dna/index.md): Describe the relationship between chromosomes, genes, and DNA in heredity, including the double helix structure of DNA and the historical roles of Watson, Crick, Franklin, and Wilkins - [Parts of Plant and Animal Cells](https://ai.page/c/parts-of-plant-and-animal-cells/index.md): Describe the functions of the main components of plant and animal cells: cell wall, cell membrane, cytoplasm, nucleus, vacuole, mitochondria, ribosomes, and chloroplasts ## 2. Knowledge and skills · Organisms and environments. The student understands stability and change in populations and ecosystems. The student is expected to: - [Food Webs & Interdependence](https://ai.page/c/food-webs-and-interdependence/index.md): Construct and interpret food webs showing the interdependence of organisms in an ecosystem, explaining how a change in one population affects others - [Biodiversity & Resilience](https://ai.page/c/biodiversity-and-resilience/index.md): Explain what biodiversity means, why high biodiversity makes ecosystems more resilient, and describe the ways human activity threatens biodiversity (habitat destruction, pollution, invasive species, climate change) ## 3. Knowledge and skills · Earth and space. The student knows that natural events and human activity can impact global climate. The student is expected to: - [The Carbon Cycle](https://ai.page/c/the-carbon-cycle/index.md): Describe the carbon cycle, tracing carbon through photosynthesis, respiration, feeding, decomposition, and combustion, and explain the role of each process - [Earth's Atmosphere & CO2](https://ai.page/c/earth-s-atmosphere-and-co2/index.md): Describe the composition of Earth's atmosphere (mainly nitrogen and oxygen, with small amounts of CO₂ and other gases), explain how human activity increases CO₂, and describe the impact on global climate ## 4. Knowledge and skills · Earth and space. The student knows that interactions between Earth, ocean, and weather systems impact climate. The student is expected to: - [Hurricanes, Tornadoes & Monsoons](https://ai.page/c/hurricanes-tornadoes-and-monsoons/index.md): Explain how hurricanes form and intensify over warm ocean water (latent heat release, low-pressure spiral); describe tornado formation within supercell thunderstorms; explain monsoon mechanics driven by temperature differences between land and sea; introduce attribution science — how scientists use climate models to calculate whether and by how much climate change increased the probability or intensity of a specific extreme weather event ## 5. Knowledge and skills · Earth and space. The student describes the characteristics of the universe and the relative scale of its components. The student is expected to: - [Galaxies and the universe](https://ai.page/c/galaxies-and-the-universe/index.md): Describe the scale of the universe, including the structure of galaxies, the position of the Sun in the Milky Way, and the use of light years as a unit of distance, and appreciate why space exploration requires enormous timescales ## 6. Knowledge and skills · Force, motion, and energy. The student knows how energy is transferred through waves. The student is expected to: - [Wave Properties & Types](https://ai.page/c/wave-properties-and-types/index.md): Describe waves in terms of amplitude, wavelength, frequency, and wave speed; distinguish transverse waves (oscillation perpendicular to direction of travel) from longitudinal waves (oscillation parallel); and use the wave equation v = fλ - [Waves & Different Materials](https://ai.page/c/waves-and-different-materials/index.md): Explain how waves can be absorbed, transmitted, or reflected by different materials, and apply these interactions to explain colour perception, sight, communication technologies, and the effects of different surfaces on wave behaviour ## 7. Knowledge and skills · Force, motion, and energy. The student understands the relationship between force and motion within systems. The student is expected to: - [Newton's First & Second Laws](https://ai.page/c/newton-s-first-and-second-laws/index.md): State and apply Newton's First Law (an object stays at rest or constant velocity unless acted on by a resultant force) and Second Law (force = mass × acceleration), including the relationship between mass, force, and acceleration - [Newton's Third Law](https://ai.page/c/newton-s-third-law/index.md): State and apply Newton's Third Law: every force has an equal and opposite reaction force acting on a different object, distinguishing action-reaction pairs from balanced forces ## 8. Knowledge and skills · Matter and energy. The student understands that matter can be classified according to its properties and matter is conserved in chemical changes that occur within closed systems - [Physical vs Chemical Changes](https://ai.page/c/physical-vs-chemical-changes/index.md): Distinguish between physical changes (reversible, no new substances formed) and chemical changes (new substances formed, often irreversible), using conservation of mass to understand both types ## 9. Knowledge and skills · Scientific and engineering practices. The student knows the contributions of scientists and recognizes the importance of scientific research and innovation on society. The stude - [Writing Science Reports](https://ai.page/c/writing-science-reports/index.md): Communicate scientific findings in a structured report using appropriate scientific vocabulary, SI units, and standard notation; describe how peer review and replication contribute to the reliability of scientific knowledge ## 10. Knowledge and skills · Scientific and engineering practices. The student develops evidence-based explanations and communicates findings, conclusions, and proposed solutions. The student is expected to - [Drawing conclusions from evidence (age 12+)](https://ai.page/c/drawing-conclusions-from-evidence-age-12/index.md): Identify patterns and trends in data, draw conclusions that directly address the hypothesis with quantitative reference to evidence, and evaluate the investigation by distinguishing between systematic and random errors and proposing targeted improvements ## 11. Knowledge and skills · Scientific and engineering practices. The student, for at least 40% of instructional time, asks questions, identifies problems, and plans and safely conducts classroom, laborato - [Tables, charts, and graphs](https://ai.page/c/tables-charts-and-graphs/index.md): Construct data tables with correct headings and SI units, plot appropriate graph types (bar chart, line graph, scatter graph), draw a line of best fit, and calculate the gradient of a straight-line graph ## 12. Introduction · Scientific observations, inferences, hypotheses, and theories. Students are expected to know that: - [Science Can Be Revised](https://ai.page/c/science-can-be-revised/index.md): Scientific knowledge is provisional — it is the best current explanation based on available evidence, and it can and should be revised when better evidence arrives - [Evidence Supporting Ideas](https://ai.page/c/evidence-supporting-ideas/index.md): Identify scientific evidence that has been used to support or refute ideas or arguments, evaluating the strength of evidence ## 13. Earth and space - [Earth's atmosphere](https://ai.page/c/earth-s-atmosphere/index.md): Develop a model to describe ways the geosphere, biosphere, hydrosphere, and atmosphere interact as connected Earth systems ## 14. Matter and energy - [Atoms, Elements & Compounds](https://ai.page/c/atoms-elements-and-compounds/index.md): Explain the differences between atoms, elements, and compounds; describe the simple Bohr model of the atom (nucleus with protons and neutrons, electrons in shells); and write and interpret chemical symbols and simple formulae - [The Periodic Table](https://ai.page/c/the-periodic-table/index.md): Describe the organisation of the periodic table into periods and groups, explain the contribution of Mendeleev, and use the table to identify metals, non-metals, and predict patterns in reactivity ## 15. Scientific and engineering practices - [Accurate Measurement](https://ai.page/c/accurate-measurement/index.md): Take measurements with increasing accuracy and precision using a range of scientific equipment, taking repeat readings when appropriate ## Health: 0 of 100 Of its 23 own concepts: 0 have an explanation, 0 have practice, 0 have a measurement question, 0 have a checked version. Findings (each is a task for anyone's AI): - How animals adapt to environments has no explanation yet - Chromosomes, Genes & DNA has no explanation yet - Parts of Plant and Animal Cells has no explanation yet - Food Webs & Interdependence has no explanation yet - Biodiversity & Resilience has no explanation yet - The Carbon Cycle has no explanation yet - Earth's Atmosphere & CO2 has no explanation yet - Hurricanes, Tornadoes & Monsoons has no explanation yet - Galaxies and the universe has no explanation yet - Wave Properties & Types has no explanation yet - Waves & Different Materials has no explanation yet - Newton's First & Second Laws has no explanation yet - Newton's Third Law has no explanation yet - Physical vs Chemical Changes comes before Atoms, Elements & Compounds, which it needs - Physical vs Chemical Changes has no explanation yet - Writing Science Reports comes before Drawing conclusions from evidence (age 12+), which it needs - Writing Science Reports has no explanation yet - Drawing conclusions from evidence (age 12+) comes before Tables, charts, and graphs, which it needs - Drawing conclusions from evidence (age 12+) has no explanation yet - Tables, charts, and graphs has no explanation yet - Science Can Be Revised has no explanation yet - Evidence Supporting Ideas has no explanation yet - Earth's atmosphere has no explanation yet - Atoms, Elements & Compounds has no explanation yet - The Periodic Table has no explanation yet - Accurate Measurement has no explanation yet Credit: The structure of Texas Essential Knowledge and Skills: Science (https://tea.texas.gov/system/files/principles-of-applied-engineering-breakouts_0.pdf); concepts from the Marble Skill Taxonomy (v1), © Generative Spark, Inc. (withmarble.com), text CC BY-SA 4.0, database ODbL 1.0: https://github.com/withmarbleapp/os-taxonomy, mapped to its standards by Marble.