What does a student learn in StateKansas,GradeGrade 9,SubjectScience?

Students study what matter is made of and how substances change when they interact. This covers atoms, chemical reactions, and why some materials behave differently than others.

Students study why things move, stop, or stay still. They learn how forces like gravity and friction act on objects and how those interactions explain everything from a rolling ball to a satellite in orbit.

Students study how energy moves, changes form, and stays constant across physical systems. That includes heat, motion, electricity, and the relationships between them.

Students study how waves move energy and information, from sound and light to radio signals and fiber optics. The focus is on how engineers use wave behavior to build the technologies that carry messages, images, and data.

Students study how living things are built and how they work, from the molecules inside a single cell up to the systems that keep a whole organism alive.

Students study how living things depend on each other and their environment to survive. They trace how energy moves through food webs and explore what happens when ecosystems are disrupted by natural events or human activity.

Students learn how traits pass from parents to offspring and why siblings can look different even when they share the same parents. The focus is on genes, DNA, and the mix of factors that shape how living things grow and develop.

Students study how life on Earth has changed over millions of years and why species share common traits. They look at fossil records, genetic evidence, and natural selection to explain both the variety of living things and the features they have in common.

Students study how the solar system, galaxy, and universe formed and how scientists use light from distant stars to figure out what space is made of and how old it is.

Students study how Earth's major systems (atmosphere, oceans, land, and living things) interact and shape each other. Think weather patterns, ocean currents, and how a volcanic eruption can affect climate across the planet.

Students study how human decisions about energy, land, and water shape Earth's systems. The focus is on real trade-offs: how mining, farming, and burning fuel change the planet, and what solutions might reduce the damage.

Students work through real design problems by identifying constraints, testing solutions, and improving their ideas based on what the evidence shows. The goal is a solution that actually works within the given limits.

Students use the periodic table to predict how an element will behave chemically. The position of an element on the table reveals how many electrons sit in its outer shell, which drives how it bonds and reacts with other elements.

Students explain why certain substances react with each other by looking at how electrons are arranged in atoms and where elements sit on the periodic table. Patterns in the table predict which reactions will happen and which won't.

Students design and run an experiment to figure out why some substances are harder, denser, or have higher melting points than others. The goal is to connect what they can measure or observe to the invisible pull between atoms and molecules.

Chemical reactions break old bonds and form new ones. Students model how the energy released or absorbed in a reaction depends on whether the new bonds store more or less energy than the old ones did.

Students explain why reactions speed up or slow down when temperature or concentration changes. They use evidence to show how particle collisions drive reaction rate.

Students figure out how to get a chemical reaction to produce more of what you want. They adjust conditions like temperature or pressure to shift the reaction in their favor.

In a chemical reaction, no atoms appear or disappear. Students use numbers and equations to show that the total mass of the starting materials always equals the total mass of the products.

Students model what happens inside an atom's nucleus during nuclear reactions like splitting atoms apart or fusing them together. The focus is on how the nucleus changes and why those reactions release so much energy.

Students look at real data to show how force, mass, and acceleration are connected. A heavier object needs more force to reach the same speed as a lighter one, and Newton's second law puts that relationship into a single equation.

Students use math to show that when two objects collide or push off each other, their combined momentum stays the same as long as nothing outside the system is pushing or pulling on them.

Students design and test something (like padding or a bumper) that reduces the impact when two objects collide. The goal is to figure out what materials or shapes best protect an object from damage.

Students use formulas to calculate how strongly two objects pull on each other due to gravity, and how strongly charged objects push or pull each other. Both forces depend on mass or charge and how far apart the objects are.

Students run hands-on experiments to show that electricity flowing through a wire creates a magnetic field, and that moving a magnet near a wire can generate electricity. These two effects are the foundation of motors and generators.

Students explain why the arrangement of atoms and molecules in a material determines what that material can do. Think of why Kevlar stops a bullet or why a Gore-Tex jacket repels rain: the answer starts at a scale too small to see.

Students build a model or equation that tracks how energy moves between parts of a system. When they know how much energy one part gains or loses, they calculate what happened to the rest.

Moving objects, stretched springs, and warm surfaces all hold energy. Students model how that energy traces back to particles in motion or to invisible fields pulling and pushing between them.

Students design and build a real device that converts one form of energy into another, like turning motion into electricity or heat into light, then test and improve it until it works within the given limits.

Students mix two materials at different temperatures, then measure how heat moves between them until both reach the same temperature. The experiment shows that heat always flows from warmer to cooler, never the other way around.

Students build or draw a model showing how two objects push or pull each other through electric or magnetic fields, then trace how the energy of each object changes as a result of that force.

Students use equations to show how a wave's frequency and wavelength connect to its speed, and how those relationships change depending on what the wave travels through, like water, air, or glass.

Students compare digital and analog ways of storing and sending information, like music or images, and explain why digital formats are easier to copy, share, and keep accurate over time.

Students look at real scientific evidence to decide whether light acts more like a wave or a tiny particle in a given situation. Both descriptions are correct depending on what you're studying, and knowing which one to use is the skill.

Students read science articles and judge whether the evidence actually supports claims about how radiation (radio waves, microwaves, X-rays, visible light) affects living tissue or other materials. The focus is on spotting weak reasoning, not just accepting what a source says.

Students learn how real devices, like radios, phones, and solar panels, use waves to send signals and capture energy. They practice explaining the science behind those devices clearly enough that someone else could follow along.

DNA holds the instructions for building proteins, and proteins do the actual work inside cells. Students learn how that code gets read and turned into the specific molecules that run nearly every process in a living body.

Living things are built in layers: cells group into tissues, tissues into organs, organs into systems. Students build or interpret a model showing how each layer depends on the one below it to keep the organism alive.

Students design and run an experiment showing how the body keeps conditions stable, like how temperature or blood sugar returns to normal after a change. The goal is collecting real evidence that internal feedback systems do the correcting.

Cells copy themselves through mitosis so a single fertilized egg can grow into a full human body. Students use diagrams or models to show how dividing cells also specialize into skin, muscle, nerve, and other tissue types.

Students trace how a plant takes in sunlight, water, and carbon dioxide and converts them into sugar the plant stores for fuel. The focus is on drawing or explaining that energy transformation, not just naming the steps.

Sugar molecules carry the carbon, hydrogen, and oxygen that cells rearrange into amino acids and other large molecules. Students build and revise an explanation using evidence for how that chemical reorganization works.

Cells break down food and oxygen to release energy the body can use. Students trace how chemical bonds break apart and reform, showing where that energy goes.

Students calculate how many organisms a habitat can support, then use that math to explain what happens when food, water, or space runs short. The work connects local ponds and forests to patterns across entire regions.

Students use graphs, models, and data to explain what drives population changes in an ecosystem. They test their explanations against real evidence and revise when the numbers tell a different story.

Students explain how matter (like carbon or oxygen) cycles through living things and the environment, and how energy moves through that same system. They compare what happens when oxygen is present versus when it isn't, and revise their explanation as they gather more evidence.

Students use graphs, equations, or diagrams to show how energy moves through a food web and how matter like carbon or nitrogen cycles from one living thing to another.

Students trace how carbon moves between living things, air, water, and rock by modeling what happens during photosynthesis and cellular respiration. They show how the same carbon atoms cycle through an ecosystem over and over.

When conditions in an ecosystem stay stable, populations tend to hold steady. Students look at real evidence to judge whether that claim holds up, and to figure out what happens to the mix of plants and animals when conditions shift.

Students design and test a plan to reduce real-world human damage to ecosystems and the species living in them. The focus is on refining the plan based on evidence, not just proposing an idea.

Students look at real examples from nature to figure out how animals living or working in groups (like wolves hunting in packs or fish swimming in schools) survive and reproduce better than animals acting alone.

DNA carries the instructions that make each living thing look and behave the way it does. Students explore how those instructions are packaged in chromosomes and passed from parents to offspring, explaining why children resemble their parents but aren't identical to them.

Students explain why offspring aren't identical copies of their parents. They look at how cell division shuffles genes, how copying errors creep into DNA, and how environmental factors can alter it.

Students use probability and basic statistics to explain why traits like eye color or height vary across a population. They look at real data to explain why not everyone in a group looks or functions the same.

Students gather and explain multiple types of evidence, such as fossils, DNA comparisons, and body structures, that show how living things share common ancestors and have changed over time.

Students build a written explanation for why evolution happens, using four real causes: populations can grow fast, offspring inherit random genetic differences, resources run short, and the individuals best suited to their environment survive to reproduce.

Students use basic probability and data to explain why a helpful inherited trait (like sharper vision or disease resistance) becomes more common in a population over time. The math backs up what natural selection actually does.

Natural selection is the process where traits that help survival get passed down more often. Students explain, using real evidence, how that pressure gradually shifts what a whole population looks like over generations.

When the environment changes, some species thrive, some slowly become new species, and others die out entirely. Students look at real evidence to decide which of those outcomes a given change would most likely cause.

Students build or adjust a computer simulation to test whether a proposed fix, like a wildlife corridor or a fishing limit, can reduce harm humans cause to plants and animals in an ecosystem.

Students map out the sun's life cycle and explain how nuclear fusion in the core produces the energy that travels to Earth as light and heat.

Students explain how the universe began by reading clues astronomers have gathered: the way starlight stretches as galaxies move away, and the hydrogen and helium spread across space. Both pieces of evidence point to a single explosive origin billions of years ago.

Stars act as factories for the elements that make up everything around us. Students explain how stars produce elements like carbon and iron during their lifetime and death, and why those elements end up scattered across the universe.

Students use math to predict where planets, moons, and other objects will be as they orbit the sun. The same calculations that guide spacecraft also explain why a solar eclipse happens on a specific date.

Continents and ocean floors are always moving, just very slowly. Students look at rock ages and locations to explain why the youngest rocks sit near mid-ocean ridges and the oldest are found deep in continental interiors.

Students use evidence from rocks, meteorites, and other planetary surfaces to piece together how Earth formed and what its earliest history looked like. The goal is building a reasoned explanation, not memorizing dates.

Students build diagrams or models showing how slow processes deep inside Earth (like magma moving through the mantle) and faster surface processes (like erosion) work together over millions of years to shape mountains, ocean trenches, and continents.

Geoscience data shows that one change on Earth's surface, like a melting glacier, can set off a chain of changes in other systems. Students analyze real data to explain how those ripple effects work.

Students build a diagram or model showing how heat deep inside the Earth moves rock and other material in slow, circular patterns, the same way hot soup rises and cool soup sinks in a pot.

Students use diagrams or models to explain how changes in the amount of energy entering or leaving Earth (from the sun, atmosphere, or oceans) can shift long-term weather patterns across regions.

Students test how water behaves differently from other liquids, then observe how those properties shape the land around us, from eroding soil to breaking down rock.

Students build a numbered, data-based model showing how carbon moves between the ocean, air, rocks, and living things. The goal is to track where carbon goes and how fast, not just name the parts of the cycle.

Students build a case, using fossils and rock layers as evidence, for how living things and Earth itself have changed each other over billions of years. Life shaped the atmosphere; shifting land and seas shaped life in return.

Students examine real examples, like drought zones or coal deposits, to explain how natural resources, disasters, and climate shifts have shaped where people settle, what they build, and how economies develop.

Students compare real proposals for mining or energy production, weighing what each option costs against what it delivers. The goal is to pick the approach that does the most good with the least harm or expense.

Students build a computer model that shows how decisions about land, water, or energy use affect both wildlife diversity and long-term human survival. The simulation makes visible what spreadsheets and maps alone can't show.

Students look at a real design (a flood barrier, a water filter, a bike lane) and judge whether it actually reduces harm to nature. They may suggest improvements based on evidence.

Students study real temperature records, sea-level measurements, and climate model outputs to predict how the climate will keep changing and what that means for coastlines, weather patterns, and ecosystems.

Students use data models or simulations to show how land, water, atmosphere, and living things connect, then trace how human actions like burning fuel or clearing forests are shifting those connections.

Students pick a real-world problem, such as clean water access or energy use, and spell out exactly what a good solution must do and what limits it must work within, like cost, materials, or safety.

Students take a big, messy real-world problem and split it into smaller pieces that are actually solvable. Then they design a solution that tackles each piece.

Students pick the best solution to a real problem by weighing what matters most: cost, safety, and how it affects people and the environment. No solution is perfect, so students explain which trade-offs are worth making.

Students use computer simulations to test an engineering solution before building it in real life. The simulation shows how the solution affects different parts of a system, so students can weigh the tradeoffs before making a final design choice.