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What does a student learn in ?

This is the year science becomes a habit of asking questions and testing ideas. Students notice patterns in the weather, watch how plants and animals grow, and try out how pushes and pulls move things across a table. They sketch what they see, record simple results, and talk about what the evidence shows. By spring, students can ask a question about something in the backyard, run a small test, and explain what happened.

  • Asking questions
  • Plants and animals
  • Pushes and pulls
  • Weather and sky
  • Earth's materials
  • Caring for the environment
Source: Pennsylvania Pennsylvania Core 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

    Thinking like a scientist

    Students start the year by asking questions about everyday things and trying to find answers. They watch closely, sketch what they see, and talk about why something happened.

  2. 2

    Matter, motion, and energy

    Students explore what things are made of and how they move. They push, pull, drop, and sort objects to see how heat, light, and sound travel from one place to another.

  3. 3

    Living things and their homes

    Students look at plants, animals, and the places they live. They notice what living things need to grow, how baby animals resemble their parents, and how creatures depend on each other.

  4. 4

    Earth, sky, and weather

    Students track patterns in the sky, the seasons, and the ground beneath their feet. They notice how rain, wind, and sunlight shape the land and change day to day.

  5. 5

    Caring for our world

    Students finish the year thinking about farms, water, and the choices people make. They look at how food gets to the table and how small actions can help keep Pennsylvania's land and water healthy.

Mastery Learning Standards
The required skills a student should display by the end of Grade 2.
Science and Engineering Practices
  • Asking Questions

    Students spot something curious in the world around them and turn it into a question worth investigating. In science, that question drives what they test next.

  • Students draw or build a simple model, like a diagram or a physical mockup, to show how something in nature works or how a design they created is meant to function.

  • Investigations

    Students design a simple test, collect what they observe or measure, and use those results to explain what happened or show that a solution works.

  • Data Analysis

    Students look at collected data (like measurements or tallies) to spot patterns, back up a conclusion, or figure out how to improve a design.

  • Mathematics and Computational Thinking

    Students use numbers, counting, or simple measurements to describe what they observe in the world around them, like tracking how much rain fell or how far a ball rolled.

  • Explanations and Solutions

    Students take what they observed or tested and use it to explain why something happened or figure out how to fix a problem. The answer has to connect back to what they actually found.

  • Argument from Evidence

    Students look at two different explanations for something they observed, then decide which one the evidence actually supports. They back up their choice with what they saw or measured, not just a guess.

  • Communicate Information

    Students read, talk, and draw to share what they learn in science. They also look at pictures, charts, and short texts to find and check scientific information.

Physical Science
  • Matter and Its Interactions

    Students sort and describe everyday materials by properties like color, hardness, and flexibility. They use those observations to explain why things behave the way they do.

  • Motion and Stability

    Students push, pull, and collide objects to see how things speed up, slow down, or change direction. They learn that forces like pushes and pulls are what make objects move or stop.

  • Students explore how energy shows up in everyday life as light, heat, sound, or motion, and how it moves from one object to another. A warm mug heating cold hands or a drum sending sound across a room are the kinds of ideas students investigate.

  • Waves and Information

    Students learn how waves move energy from one place to another, like sound traveling through air or light bouncing off a surface. They explore how waves carry information, the way a phone call or a radio signal does.

Life Science
  • Structures and Processes

    Students look closely at living things, from the tiny building blocks inside them to the whole body and how it works. This covers plants, animals, and other organisms.

  • Ecosystems

    Students learn how plants, animals, and other living things in a place depend on each other for food and survival. They also explore how water and nutrients move through an ecosystem and come back around.

  • Students look at traits like eye color, hair texture, or leaf shape and figure out which ones were passed down from parents. They also notice how offspring can look similar to their parents without being identical.

  • Biological Evolution

    Students look at how plants and animals are alike and different, and start to explore why living things change over generations. They compare features across species to see patterns in how life is organized.

Earth and Space Science
  • Earth's Place in the Universe

    Students learn why the sun appears to move across the sky each day and how the moon changes shape over the month. They also explore how Earth's rocks and land give clues about what happened here long ago.

  • Earth's Systems

    Students learn how the land, water, air, and living things on Earth connect and affect each other. They explore what happens when one of those parts changes.

  • Earth and Human Activity

    Students learn how people change the land, water, and air around them, and what happens when natural events like floods or storms disrupt daily life.

Environmental Literacy and Sustainability
  • Agriculture and Society

    Students look at how farms and food systems keep people fed and clothed, and at what those systems take from and give back to the land around them.

  • Environment and Ecology

    Students explore how plants, animals, water, and land connect in local ecosystems. They look at real environmental issues, like what affects the water and wildlife in Pennsylvania.

  • Sustainability

    Students look at how people meet everyday needs, like growing food or using water, without wearing out the land, air, or water that plants and animals depend on.

No state assessments at this grade
Students take their next one in Grade 4.
State Summative

PSSA Science (Grade 4)

PSSA Science is the grade 4 spring science test, aligned to PA Standards (transitioning to STEELS).

When given:
spring
Frequency:
annual
Official source
National Monitoring

NAEP (National Assessment of Educational Progress)

Federally administered sample-based assessment in reading, mathematics, science, and writing. NAEP results inform state-by-state comparisons rather than individual student or school accountability.

When given:
biennial in winter
Frequency:
every two years
Official source
Common Questions
  • What does second grade science actually cover?

    Students explore how things move and what they're made of, how plants and animals live and grow, and how Earth changes over time. They also look at weather, water, and how people take care of farms and forests. Most learning happens through hands-on investigations rather than reading about science.

  • How can families build science thinking at home?

    Ask questions while cooking, gardening, or walking outside. Notice patterns in the weather, watch how a ball rolls down a ramp, or compare leaves from two trees. A few minutes of wondering out loud teaches more than a worksheet.

  • Do students need to memorize a lot of science vocabulary?

    Not really. Second graders should be able to describe what they see and explain their thinking in their own words. Big terms like ecosystem or matter can wait. What matters is that students can say what changed and why they think it changed.

  • How should the year be sequenced across the four science areas?

    Many teachers anchor each quarter to one strand: matter and motion in fall, living things and habitats in winter, Earth and weather in spring, and sustainability woven through. The eight science practices run across every unit rather than getting their own block.

  • What does mastery look like by the end of second grade?

    Students can ask a science question, plan a simple test, and explain what they found using evidence from what they saw. They can sort, compare, and draw what they observed. They are not expected to write formal lab reports.

  • Which skills usually need the most reteaching?

    Drawing conclusions from data is the hardest part. Students often jump to an answer before looking at what their results actually show. Plan to model the move from observation to claim many times across different units before expecting students to do it on their own.

  • How can a parent help with a science fair project or investigation?

    Let students pick the question and do the hands-on work. Help by asking what they notice, what they expected, and what surprised them. The project should look like a second grader did it, because a second grader did.

  • How do engineering challenges fit into a science year?

    Short design tasks pair well with most units. After studying motion, students can build a ramp. After studying habitats, they can design a bird feeder. Two or three challenges across the year are usually enough to practice planning, testing, and improving a design.