Skip to content

What does a student learn in ?

This is the year science becomes about evidence. Students push and pull objects to see how forces change motion, and they test magnets to predict what happens next. They study how plants and animals are born, grow, and pass on traits, and how some survive better than others when the weather or habitat shifts. By spring, students can run a simple experiment, record what they see in a chart, and use that data to back up a claim.

  • Forces and motion
  • Magnets
  • Life cycles
  • Inherited traits
  • Weather and climate
  • Habitats and survival
  • Science investigations
Source: Washington Washington K-12 Learning Standards
Year at a glance
How the year usually goes. Every school and district set their own curriculum, so treat this as a guide, not official pacing.
  1. 1

    Forces, motion, and magnets

    Students push, pull, and roll objects to see how forces change motion. They notice patterns that predict what happens next and explore how magnets pull or push without touching.

  2. 2

    Life cycles and inherited traits

    Students look at how plants and animals are born, grow, reproduce, and die. They compare traits passed down from parents and notice how the environment can shape what a living thing looks like or can do.

  3. 3

    Survival, groups, and fossils

    Students study why some animals live in groups and how certain traits help a plant or animal survive in its habitat. They also read fossils as clues about creatures and places from long ago.

  4. 4

    Weather, climate, and hazards

    Students collect weather data and put it into tables and graphs to describe a typical season. They compare climates around the world and weigh design ideas that protect people from storms, floods, or heat.

  5. 5

    Caring for the local environment

    Students take their science outside. They investigate the school grounds, gather information about local water, air, and wildlife, and propose actions that improve the place where they live.

Mastery Learning Standards
The required skills a student should display by the end of Grade 3.
Physical Science
  • Use evidence and data to investigate and measure an object’s motion and how…

    WA 3.PS2

    Students measure how fast and far objects move, then test how pushes, pulls, and magnets change that motion. They use what they find to design something that puts magnetic force to work.

  • Plan and conduct an investigation to provide evidence of the effects of…

    3-PS2-1

    Students set up tests with real objects to see what happens when forces on something are equal (it stays put) or unequal (it moves). The goal is to collect actual evidence, not just make a guess.

  • Make observations and/or measurements of an object’s motion to provide evidence…

    3-PS2-2

    Students watch how an object moves, such as a ball rolling down a ramp, then use that pattern to predict where it will go next. Repeated observations make the prediction more reliable.

  • Ask questions to determine cause and effect relationships of electric or…

    3-PS2-3

    Students ask questions about why magnets push or pull each other without touching, or why a balloon rubbed on hair can make things stick to a wall without any glue.

  • Define a simple design problem that can be solved by applying scientific ideas…

    3-PS2-4

    Students identify a real problem that magnets could solve, then describe a simple device or fix that uses magnetic push or pull to solve it.

Life Science
  • Use modeling to show, compare

    WA 3.LS1

    Students model and compare the stages animals and plants go through from birth to death, such as egg to tadpole to frog, or seed to flower. The goal is to spot what life cycles have in common and where they differ.

  • Develop models to describe that organisms have unique and diverse life cycles

    3-LS1-1

    Students draw and label the life cycles of different animals and plants, showing how every living thing is born, grows, reproduces, and dies. The details differ by species, but that four-part pattern holds across all of them.

  • Use evidence and data to show and explain inherited and acquired traits

    WA 3.LS3

    Students sort traits they were born with (like eye color or fur pattern) from traits they picked up over time (like a scar or a learned skill), then use that knowledge to explain why some variations help an animal survive and have offspring.

  • Analyze and interpret data to provide evidence that plants and animals have…

    3-LS3-1

    Plants and animals get their looks from their parents, but not every offspring looks identical. Students study real data to see which traits pass down and how much those traits can vary within the same species.

  • Use evidence to support the explanation that traits can be influenced by the…

    3-LS3-2

    Living things don't just inherit their looks from parents. Where an animal or plant grows up, what it eats, and what surrounds it can all shape how it turns out. Students find real examples that show how environment changes traits.

  • Use evidence to construct an explanation for how the variations in…

    3-LS4-2

    Some animals in a group look slightly different from others, and those differences can help certain ones survive or find a mate. Students study real examples to explain why variation within a species matters.

  • Use evidence, data, and modeling to show and explain how characteristics and…

    WA 3.LS4

    Students study how an animal's body features and behaviors help it survive in a specific place, like how a duck's webbed feet suit a pond. They also look at what happens when that environment changes and how living things adapt or struggle.

  • Construct an argument that some animals form groups that help members survive

    3-LS2-1

    Students look at animals like wolves or penguins and explain, using evidence, why living in a group helps those animals find food, stay safe, or survive harsh conditions.

  • Analyze and interpret data from fossils to provide evidence of the organisms…

    3-LS4-1

    Fossils are clues about ancient life. Students study fossil evidence to figure out what plants and animals looked like millions of years ago and what kind of place they lived in.

  • Construct an argument with evidence that in a particular habitat some organisms…

    3-LS4-3

    Some animals and plants thrive in a habitat, others just get by, and some cannot live there at all. Students study real examples to explain why a habitat's conditions determine which organisms survive.

  • Make a claim about the merit of a solution to a problem caused when the…

    3-LS4-4

    Students pick a real-world problem caused by a changing environment and argue whether a proposed solution would actually help the plants and animals living there.

Earth and Space Sciences
  • Use research, data, and modeling to show and explain patterns in weather and…

    WA 3.ESS2

    Students study weather patterns across seasons and locations, then use real data and simple models to explain why some places are rainy, dry, hot, or cold.

  • Represent data in tables and graphical displays to describe typical weather…

    3-ESS2-1

    Students record temperature, rainfall, and other weather patterns in charts or graphs to show what weather is typical in each season, like cold and snowy in winter or warm and rainy in spring.

  • Obtain and combine information to describe climates in different regions of the…

    3-ESS2-2

    Students gather facts from books, maps, and other sources to compare weather patterns across different parts of the world, like why some regions stay hot and dry year-round while others get cold winters and snowy seasons.

  • Use engineering thinking to compare and analyze solutions to weather related…

    WA 3.ESS3

    Students look at real tools and designs people have made to handle tough weather, then compare how well each one works. The goal is to figure out which solution does the best job solving the problem.

  • Make a claim about the merit of a design solution that reduces the impacts of a…

    3-ESS3-1

    Students look at real designs (like seawalls, storm drains, or wind-resistant roofs) and explain whether the design actually helps protect people from storms, floods, or other dangerous weather.

K–2 Engineering, Technology, and Applications of Science
  • Use modeling, investigation

    WA 3.ETS1

    Students figure out how to solve a real problem by designing and testing a solution, then using what they learned to make it better. They track what worked, what didn't, and why.

Environmental and Sustainability Education
  • Through project-based learning, synthesize information from multiple sources…

    3.ESE.1-1

    Students research a local environmental problem, gather information from multiple sources, and work with classmates and community members to build a real solution for their area.

  • Design an investigation on school grounds to gather, analyze

    3.ESE.1-2

    Students pick something on their school grounds (a parking lot, a garden, a drain) and study whether it helps or harms the local environment. They collect real data, then explain what they found.

  • Gather, analyze, and evaluate information, building the knowledge, attitudes

    3.ESE.1-3

    Students look at real information about their local environment, like air, water, or land, and figure out what they and their community can do to keep it healthy now and in the future.

Common Questions
  • What science will students learn this year?

    Students study four big areas: how forces and magnets move objects, how living things grow and inherit traits, how weather and climate work, and how to design solutions to real problems. Most of the learning happens through hands-on investigations and building simple models.

  • How can I help with science at home?

    Watch the weather together for a week and jot down what you notice. Roll toy cars down ramps and ask what made one go farther. Stick magnets on the fridge and test which objects pull and which do not. Small noticing moments count.

  • What does my child need to know about forces and motion?

    Students learn that pushes and pulls change how things move, and that patterns in motion let you predict what happens next. A swing, a rolling ball, or a bike braking are all good things to point out and talk about.

  • How should I sequence the year?

    Many teachers start with forces and motion in the fall because it is concrete and easy to investigate. Life cycles and traits fit well in spring when plants and animals are active outside. Weather and climate can run alongside as a year-long data project.

  • What usually needs the most reteaching?

    Cause and effect with magnets and static electricity trips students up because the forces act without touching. Inherited versus learned traits also needs revisiting, since students often assume every trait comes from parents. Plan extra investigation time for both.

  • What is the engineering and environmental piece about?

    Students define a small problem, design a solution, test it, and improve it. The environmental work asks them to look at their own school grounds and local community, gather data, and propose changes that improve water, air, waste, or habitat.

  • How do I know students are ready for fourth grade science?

    By spring, students should be able to plan a simple fair test, record data in a table or graph, and use that evidence to explain what they found. They should also be comfortable building a model to show an idea like a life cycle or a weather pattern.

  • Does my child need to memorize a lot of science vocabulary?

    Not really. Understanding the ideas matters more than reciting terms. If students can explain in their own words why a plant needs sun, or why a magnet sticks to some metals, they are in good shape.