Key Idea 2: Many of the phenomena that we observe on Earth involve interactions among components of air, water, and land.

PERFORMANCE INDICATOR 2.1: Use the concepts of density and heat energy to explain observations of weather patterns, seasonal changes, and the movements of Earth's plates.

MAJOR UNDERSTANDING 2.1b: The transfer of heat energy within the atmosphere, the hydrosphere, and Earth's interior results in the formation of regions of different densities. These density differences result in motion.

MAJOR UNDERSTANDING 2.1k: The outward transfer of Earth's internal heat drives convective circulation in the mantle that moves the lithospheric plates comprising Earth's surface.

MAJOR UNDERSTANDING 2.1l: The lithosphere consists of separate plates that ride on the more fluid asthenosphere and move slowly in relationship to one another, creating convergent, divergent, and transform plate boundaries. These motions indicate Earth is a dynamic geologic system.

• These plate boundaries are the sites of most earthquakes, volcanoes, and young mountain ranges.

• Compared to continental crust, ocean crust is thinner and denser. New ocean crust continues to form at mid-ocean ridges.

MAJOR UNDERSTANDING 2.1o: Plate motions have resulted in global changes in geography, climate, and the patterns of organic evolution.

MAJOR UNDERSTANDING 2.1p: Landforms are the result of the interaction of tectonic forces and the processes of weathering, erosion, and deposition.

KEY IDEA 1: The central purpose of scientific inquiry is to develop explanations of natural phenomena in a continuing and creative process

PERFORMANCE INDICATOR 1.1: Elaborate on basic scientific and personal explanations of natural phenomena, and develop extended visual models and mathematical formulations to represent one's thinking.

PERFORMANCE INDICATOR 1.2: Hone ideas through reasoning, library research, and discussion with others, including experts

PERFORMANCE INDICATOR 1.3: Work towards reconciling competing explanations; clarify points of agreement and disagreement

PERFORMANCE INDICATOR 1.4: Coordinate explanations at different levels of scale, points of focus, and degrees of complexity and specificity, and recognize the need for such alternative representations of the natural world.

KEY IDEA 3: The observations made while testing proposed explanations, when analyzed using conventional and invented methods, provide new insights into natural phenomena.

PERFORMANCE INDICATOR 3.1: Use various methods of representing and organizing observations (e.g. diagrams, tables, charts, graphs, equations matrices) and insightfully interpret the organized data

PERFORMANCE INDICATOR 3.3: Assess correspondence between the predicted result contained in the hypothesis and actual result, and reach a conclusion as to whether the explanation on which the prediction was based is supported

Average Chemical Composition of Earth's Crust, Hydrosphere, and Troposphere (p.1)

Inferred Properties of Earth's Interior (p.10)

Earthquake P-wave and S-wave Travel Time (p.11)

Reading: Key Ideas and Details

Determine the central ideas or conclusions of a text; trace the text’s explanation or depiction of a complex process, phenomenon, or concept; provide an accurate summary of the text.

Reading: Key Ideas and Details

Follow precisely a complex multistep procedure when carrying out experiments, taking measurements, or performing technical tasks attending to special cases or exceptions defined in the text. 

Reading: Craft and Structure

Determine the meaning of symbols, key terms, and other domain-specific words and phrases as they are used in a specific scientific or technical context relevant to grades 9–10 texts and topics.

Reading: Craft and Structure

Analyze the author’s purpose in providing an explanation, describing a procedure, or discussing an experiment in a text, defining the question the author seeks to address.

Reading: Integration of Knowledge and Ideas

Translate quantitative or technical information expressed in words in a text into visual form (e.g., a table or chart) and translate information expressed visually or mathematically (e.g., in an equation) into words.

Reading: Integration of Knowledge and Ideas

Assess the extent to which the reasoning and evidence in a text support the author’s claim or a recommendation for solving a scientific or technical problem.

Reading: Integration of Knowledge and Ideas

Compare and contrast findings presented in a text to those from other sources (including their own experiments), noting when the findings support or contradict previous explanations or accounts.

Reading: Range of Reading and Level of Text Complexity

By the end of grade 10, read and comprehend science/technical texts in the grades 9–10 text complexity band independently and proficiently

Writing: Text Types and Purposes

Write informative/explanatory texts, including the narration of historical events, scientific procedures/ experiments, or technical processes.

1. Introduce a topic and organize ideas, concepts, and information to make important connections and distinctions; include formatting (e.g., headings), graphics (e.g., figures, tables), and multimedia when useful to aiding comprehension.
2. Develop the topic with well-chosen, relevant, and sufficient facts, extended definitions, concrete details, quotations, or other information and examples appropriate to the audience’s knowledge of the topic.
3. Use varied transitions and sentence structures to link the major sections of the text, create cohesion, and clarify the relationships among ideas and concepts.
4. Use precise language and domain-specific vocabulary to manage the complexity of the topic and convey a style appropriate to the discipline and context as well as to the expertise of likely readers.
5. Establish and maintain a formal style and objective tone while attending to the norms and conventions of the discipline in which they are writing.
6. Provide a concluding statement or section that follows from and supports the information or explanation presented (e.g., articulating implications or the significance of the topic).

Writing: Production and Distribution of Writing

Produce clear and coherent writing in which the development, organization, and style are appropriate to task, purpose, and audience.

Writing: Range of Writing

Write routinely over extended time frames (time for reflection and revision) and shorter time frames (a single sitting or a day or two) for a range of discipline-specific tasks, purposes, and audiences.