From Molecules to Organisms | Living things are built from cells, and those cells run on chemical processes. Students learn how organisms take in food, water, and air and convert those inputs into energy and growth. | MS-LS-1 |
Conduct an investigation to provide evidence that living things are made of… | Students investigate living things to show that every organism is built from cells. Some organisms, like bacteria, are a single cell. Others, like plants and animals, contain many cells working together. | MS-LS-1.1 |
Develop and use a model to describe the function of a cell as a whole and ways… | Students learn how a cell works as a living unit and how its parts, like the nucleus and membrane, each handle a specific job that keeps the whole cell running. | MS-LS-1.2 |
Make a claim supported by evidence for how a living organism is a system of… | Living things are made of cells that work together in groups. Students explain how those groups form larger systems (like a digestive or nervous system) and show, with evidence, how those systems depend on each other to keep the organism alive. | MS-LS-1.3 |
Construct a scientific argument based on evidence to defend a claim of life for… | Students pick an object or organism and use real evidence to argue whether it is alive or not. They support their claim the way a scientist would, pointing to specific traits like growth, reproduction, or response to the environment. | MS-LS-1.4 |
Construct a scientific explanation based on evidence for the role of… | Students explain how plants use sunlight, water, and air to make food, and how that process moves energy and materials through living things. This is the foundation of nearly every food chain on Earth. | MS-LS-1.5 |
Develop a conceptual model to describe how food is rearranged through chemical… | Food doesn't just disappear when the body uses it. Students learn how cells break food apart and rearrange its molecules through chemical reactions to build new body parts or release energy. | MS-LS-1.6 |
Ecosystems: Interactions, Energy | Students study how living things in an ecosystem depend on each other and on their surroundings to survive. They trace how energy moves through food webs and explore what happens when ecosystems are disrupted. | MS-LS-2 |
Analyze and interpret data to provide evidence for the effects of resource… | Students look at real data to explain how the amount of food, water, or space in an area shapes whether a population grows, shrinks, or holds steady. Scarce resources limit how many organisms can survive in one place. | MS-LS-2.1 |
Construct an explanation that predicts patterns of interactions among organisms… | Students predict how organisms in different ecosystems interact, such as how predators and prey keep each other's populations in check. The goal is to spot patterns that show up across many environments, not just one. | MS-LS-2.2 |
Develop a model to describe the cycling of matter and flow of energy among… | Students trace how matter (like carbon or water) moves through an ecosystem and how energy flows from the sun through plants, animals, and soil. They build a diagram or model to show how living things and their environment stay connected. | MS-LS-2.3 |
Develop a model to describe the flow of energy through the trophic levels of an… | Students trace how energy moves from plants to plant-eaters to predators in a food chain. They build a diagram or model showing how much energy passes from one level to the next. | MS-LS-2.4 |
Construct an argument supported by evidence that changes to physical or… | When a river dries up or a new predator arrives, the animals and plants living there change too. Students use real examples to argue why a shift in one part of an ecosystem ripples through the populations that depend on it. | MS-LS-2.5 |
Design and evaluate solutions for maintaining biodiversity and ecosystem… | Students look at real threats to an ecosystem, such as habitat loss or invasive species, then propose and test solutions that keep the web of plants and animals intact and the land, water, and air usable. | MS-LS-2.6 |
Heredity: Inheritance and Variation of Traits | Students learn how traits, like eye color or height, pass from parents to offspring and why children look similar to but not exactly like their parents. | MS-LS-3 |
Develop and use a model to describe why mutations may result in harmful… | A mutation is a change in a gene. Students learn why that change can hurt an organism, help it survive, or make no difference at all, depending on which part of the body the gene controls. | MS-LS-3.1 |
Develop and use a model to describe why asexual reproduction results in… | Asexual reproduction copies a parent's genetic information exactly, so offspring look like clones. Sexual reproduction mixes genetic information from two parents, which is why siblings from the same parents can look different from each other. | MS-LS-3.2 |
| | Students study why living things look and behave differently across species, and how those differences help each organism survive in its environment. | MS-LS-4 |
Analyze and interpret data for patterns in the fossil record that document the… | Fossils are clues about life long before humans existed. Students study fossil records to spot patterns in how living things appeared, changed, or died out over millions of years. | MS-LS-4.1 |
Apply scientific ideas to construct an explanation for the anatomical… | Students compare body parts across living animals and fossils to figure out which species share a common ancestor. A fish fin and a human arm, for example, have the same underlying bone structure because they come from the same evolutionary line. | MS-LS-4.2 |
Analyze visual evidence to compare patterns of similarities in the anatomical… | Students look at bones, body parts, or other physical features across related animals and compare what matches. Similar structures across species are a clue that those animals share a common ancestor. | MS-LS-4.3 |
Construct an explanation based on evidence that describes how genetic… | Some animals in a group are born slightly different from the others. Students explain, using real evidence, how those differences can make certain individuals more likely to survive and have offspring in a given place. | MS-LS-4.4 |
Obtain, evaluate, and communicate information about how technologies allow… | Students learn how humans use science and technology to control which traits get passed down in plants and animals. That includes selective breeding and genetic tools used in farming, medicine, and conservation. | MS-LS-4.5 |
Use mathematical models to support explanations of how natural selection may… | Students use graphs and data to explain why certain traits become more or less common in a population over generations. The math shows how natural selection shifts what a group of living things looks like over time. | MS-LS-4.6 |