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  • Organisms and environments

Science.2.12.A

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The student is expected to

describe how the physical characteristics of environments, including the amount of rainfall, support plants and animals within an ecosystem;

A student expectation is directly related to the knowledge and skills statement, is more specific about how students demonstrate their learning, and always begins with a verb. Student expectations are further broken down into their component parts, often referred to as “breakouts.”

  • Overview
  • Alignments
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SCIENCE.2.12.A — Vertical Alignment

Vertical alignment shows student expectations in the same subject area at different grade levels that are related to or build upon one another.

S.1.12.A

classify living and nonliving things based upon whether they have basic needs and produce young;

S.1.12.B

describe and record examples of interactions and dependence between living and nonliving components in terrariums or aquariums; and

S.2.12.A

describe how the physical characteristics of environments, including the amount of rainfall, support plants and animals within an ecosystem;

S.3.12.A

explain how temperature and precipitation affect animal growth and behavior through migration and hibernation and plant responses through dormancy;

S.5.12.A
observe and describe how a variety of organisms survive by interacting with biotic and abiotic factors in a healthy ecosystem;
S.6.12.A
investigate how organisms and populations in an ecosystem depend on and may compete for biotic factors such as food and abiotic factors such as availability of light and water, range of temperatures, or soil composition;
AQUA.9.C
explain how tidal cycles influence intertidal ecology.
ENVIR.5.C
evaluate the effects of fluctuations in abiotic factors on local ecosystems and local biomes;
ENVIR.5.D
measure the concentration of dissolved substances such as dissolved oxygen, chlorides, and nitrates and describe their impacts on an ecosystem;
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Recurring themes and concepts — Connections to the content

Recurring themes and concepts provide a connective structure for scientific ideas across disciplines. The connection(s) below show some ways that teachers can help students understand how the content they are learning fits into the broader understanding of science. These connections do not represent all possible connections that might be made but highlight some that are appropriate for this grade level.
Patterns

 Patterns are regular sequences that can be found throughout nature.

 Environments with similar characteristics (patterns) will support similar types and amounts of organisms. Bodies of water each have different types of fish.

Cause-and-effect relationships

 Cause-and-effect relationships are relationships between two or more variables or phenomena whereby one variable or event leads to a predictable response. Events have causes—sometimes simple, sometimes multi-faceted.

 The physical characteristics of an environment (cause) will impact the abundance and survival (effect) of plants and animals in the ecosystem.

Model the interdependence and parts of a system

 A system is a whole made of parts that work together. It has components and boundaries. It can interact with or be part of other systems.

 The physical characteristics (parts) of an environment (system) affect and are affected by the organisms (parts) within the environment.

Cross-curricular Connections

The cross-curricular connections are designed to help educators make content connections between the science TEKS and math, English language arts and reading, social studies, and technology applications. The standards below illustrate alignment between grade level content areas which may help educators develop cross-curricular lessons. These connections do not represent all possible connections that might be made.
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Math

Math.2.1.D communicate mathematical ideas, reasoning, and their implications using multiple representations, including symbols, diagrams, graphs, and language as appropriate

Math.2.1.E create and use representations to organize, record, and communicate mathematical ideas

Math.2.10.A explain that the length of a bar in a bar graph or the number of pictures in a pictograph represents the number of data points for a given category

Math.2.10.B organize a collection of data with up to four categories using pictographs and bar graphs with intervals of one or more

Math.2.10.D draw conclusions and make predictions from information in a graph

English Language Arts and Reading

ELAR.2.6.E make connections to personal experiences, ideas in other texts, and society

ELAR.2.6.F make inferences and use evidence to support understanding

ELAR.2.6.H synthesize information to create new understanding

ELAR.2.7.C use text evidence to support an appropriate response

ELAR.2.13.E demonstrate understanding of information gathered

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