Matter, Systems, and the Sky: Grade 5 Science

This unit gets your child to accept something that sounds obvious but isn't: everything, including air, is made of tiny particles you can't see, and those particles take up space and have weight. It starts with hands-on evidence — balloons, syringes, a scale — before asking your child to draw and defend their own particle pictures of everyday things like a drying towel.

1. Matter is made of particles+

   State that all matter is made of particles too small to see.

2. Solids, liquids, and gases+

   Classify a given sample (air in a balloon, ice cube, water in a cup) by its state of matter using shape and volume behavior.

3. Air takes up space+

   Explain why a sealed, empty-looking syringe resists being pushed using the idea that air takes up space.

4. Air has weight+

   Compare the weight of an inflated balloon to an identical deflated balloon to infer that air has weight.

5. Particles in liquids and gases+

   Draw a particle diagram showing particles closer together in a liquid than in a gas, and further apart in a gas than a liquid.

6. Why a wet towel dries+

   Generate a particle-model explanation for why a wet towel left out overnight becomes dry.

7. Figuring out the word particle+

   Determine the meaning of the term 'particle' as used in a grade-level informational text passage about matter.

8. When matter seems to disappear+

   Justify, using evidence from a balloon, sugar-water, and a drying towel, that particles are conserved even when matter seems to vanish, in a context not used during instruction (a sealed bag of shrinking ice).

9. Claim and evidence about gases+

   Summarize the main claim and one piece of supporting evidence from a short science text about invisible gases.

Your child tests, with an actual scale, whether dissolved or mixed stuff still exists and still has weight. They move from just weighing things to arguing that total weight never changes when you mix or dissolve — even though the salt has vanished from sight. They also learn to tell mixtures from solutions, and separate mixtures by filtering or evaporating.

1. The particle model of matter+

   State that Unit 1's particle model claims matter is made of particles too small to see.

2. Does dissolving change weight+

   Predict, before weighing, whether dissolving salt in water will change the total weight, then compare the prediction to measured data.

3. Mixtures and solutions+

   Classify given examples as a mixture, a solution, or neither, based on whether the parts can be seen and whether they settle.

4. Dissolved salt is still there+

   Explain, using the particle model, why dissolved salt is still present in water even though it cannot be seen.

5. Weighing before and after mixing+

   Execute the four-step procedure for using a balance to compare total weight before and after mixing two substances.

6. Choosing how to separate mixtures+

   Select filtering or evaporating as the correct method to separate a given mixture, based on whether the parts dissolved.

7. Graphing weight before and after+

   Construct a bar graph of total weight before and after dissolving from a data table the student collected.

8. Weighing oil and water+

   Argue from a novel household dataset (oil and water shaken, then settled) whether the total weight stayed the same, using the particle model.

9. Changes you can undo+

   Compare a mixture that settles back out with a solution that does not, to identify what makes a change reversible.

This unit teaches one test for sorting any change in matter: did a new substance actually form? Your child moves from watching demonstrations (melting, tearing, burning) to sorting cards to classifying brand-new household examples on their own, always backing it up with evidence like color, gas, temperature, or smell — not with how dramatic the change looked.

1. What a physical change is+

   State that a physical change keeps the same substance, only shape or state changes, and apply that test to classify 3 novel physical-change examples (folding foil, crushing a cracker, melting chocolate).

2. What a chemical change is+

   State that a chemical change produces a new substance with new properties, and name the specific new substance formed in two novel examples (rusting nail, burnt toast).

3. Physical or chemical change+

   Classify a demonstrated change (melting butter, tearing paper, burning a match) as physical or chemical using the substance-identity test.

4. Color change is not enough+

   Explain why a color change alone does not prove a chemical change occurred, using the food-coloring-in-water and browning-apple contrast.

5. Fast and slow changes+

   Compare rusting (slow) and baking soda plus vinegar (fast) to identify that speed does not determine change type.

6. Four clues of chemical change+

   Identify which of four evidence types (color, gas, temperature, odor) is present in a given household example.

7. Weight in a sealed reaction+

   Predict whether the total mass of a sealed reaction (baking soda and vinegar in a bag) changes, and justify using Unit 2's conservation claim.

8. Sorting household changes+

   Classify eight household changes not previously demonstrated in class as physical or chemical, citing specific evidence for each.

9. Why dissolving is physical+

   Explain in writing why a claimed chemical change (e.g., dissolving sugar) is actually physical, using evidence and citing the substance-identity criterion.

Your child takes the conservation idea and the physical/chemical test and points them at living things. The centerpiece is a real investigation: weigh soil and a growing bean plant before and after several weeks of growth, and use the actual numbers to figure out where a plant's added mass really comes from. Then photosynthesis and decomposition get named as chemical changes, and matter gets traced from producers to consumers to decomposers.

1. What photosynthesis needs+

   State that plants use air, water, and sunlight to build their own matter through photosynthesis.

2. Labeling a photosynthesis diagram+

   Label a photosynthesis diagram with its three inputs and one new substance, given the same diagram structure shown in class.

3. Where plant mass comes from+

   Explain why a plant's mass gain comes mostly from air and water rather than soil, using the soil-weighing investigation as evidence.

4. Two chemical changes in nature+

   Classify photosynthesis and decomposition as chemical changes using the criteria of new substance formation from Unit 3.

5. Matter in a food chain+

   Diagram the movement of matter from a producer through a consumer to a decomposer in a given food chain.

6. Energy flow and matter cycling+

   Compare energy flow and matter cycling in an ecosystem, identifying what is reused versus what is not.

7. Where a dead leaf goes+

   Predict what happens to the matter in a dead leaf left on the ground for one year.

8. Bean plant mass argument+

   Construct a written claim-evidence-reasoning argument about the source of a bean plant's added mass, using investigation data.

9. Where matter goes in decay+

   Explain to a partner, using precise vocabulary, where matter goes when an unfamiliar organism (a mushroom on a log) decomposes it.

This unit zooms out to Earth's four big systems — the land (geosphere), water (hydrosphere), air (atmosphere), and living things (biosphere) — and asks how one event can ripple across all of them. A rainstorm gets worked through in detail first, then a wildfire gets tried with less help, and finally a human activity (like damming a river) raises the stakes.

1. The four Earth systems+

   Students name the four Earth systems (geosphere, hydrosphere, atmosphere, biosphere) and classify example items into the correct system.

2. Sorting landscape features by system+

   Given a labeled photo of a landscape, students classify each visible feature as belonging to the geosphere, hydrosphere, atmosphere, or biosphere.

3. Where Earth systems meet+

   Students identify where two Earth systems touch or overlap in a photograph, given a modeled example.

4. Evaporation moves water to air+

   Students explain how evaporation moves water matter from the hydrosphere into the atmosphere, using particle-model vocabulary from Unit 1.

5. Matter moving in a rainstorm+

   Given the rainstorm case study, students diagram how a single rainstorm event moves matter across at least three of the four Earth systems.

6. One system changes another+

   Students compare the rainstorm case and a wildfire case to identify a common pattern: a change in one system causes a change in another.

7. First system people change+

   Students infer which Earth system a human activity (such as damming a river) will most directly change first, before tracing further effects.

8. Volcano effects on Earth systems+

   Given a completely new event never discussed in class (a volcanic eruption), students construct a system-interaction diagram explaining effects on at least three Earth systems.

9. Finding a shared claim+

   Students summarize a short informational text about a human activity's effect on Earth's systems, identifying the two texts' shared claim.

Your child finds out that most of Earth's water is salt water or ice, and the fraction that's actually drinkable fresh water is small and unevenly spread around. They build a scaled, measured physical model of that distribution — using real measured liquid, not just a diagram — and use it as evidence in a written argument about scarcity. The water cycle gets taught as the mechanism moving water between these places.

1. Earth's water is mostly salty+

   State that most of Earth's water is salt water located in oceans.

2. Water cycle stage names+

   Name the four water cycle stages (evaporation, condensation, precipitation, collection) using the exact diagram taught in class.

3. Sorting Earth's water sources+

   Classify a named water source (glacier, river, groundwater well, ocean, lake) as salt water, frozen fresh water, or liquid fresh water.

4. Reading graphs of Earth's water+

   Interpret a bar graph or pie chart of the percentages of Earth's water in each reservoir to identify which fraction is usable fresh water.

5. Why puddles disappear+

   Explain why a puddle disappears using the particle model of evaporation.

6. A new water cycle diagram+

   Sequence the stages of the water cycle (evaporation, condensation, precipitation, collection) using an unfamiliar or differently drawn diagram.

7. Water moving between Earth systems+

   Explain how water moves between two Earth systems (e.g., ocean to atmosphere, atmosphere to land) using the water cycle model.

8. Building a scale water model+

   Construct a proportional physical model of Earth's water distribution using a measured volume of liquid to represent usable fresh water.

9. Writing a water scarcity claim+

   Write a claim about water scarcity supported by evidence from a self-built scaled water model.

10. When one water source changes+

    Predict how a change in one Earth reservoir (e.g., melting glacier) would affect water available in another reservoir.

This unit names the sun as the energy source behind weather and the water cycle, then uses a physical globe-and-lamp model to explain day and night. The second half switches to real data: your child reads a season's worth of sunrise and sunset times and figures out whether days are getting longer or shorter, then connects that pattern to Earth's motion.

1. The sun powers water and weather+

   State that the sun is Earth's main source of energy for weather and the water cycle.

2. What makes day and night+

   Explain, using the globe-and-lamp model, why Earth's rotation causes day and night.

3. Rotation versus revolution+

   Differentiate Earth's rotation from Earth's revolution when explaining a given sky observation.

4. Reading sunrise and sunset tables+

   Interpret a table of recorded sunrise and sunset times to identify whether day length is increasing or decreasing across a season.

5. Earth's motion and day length+

   Explain a seasonal pattern of change in day length by connecting it to Earth's motion, using energy-transfer vocabulary from Units 5 and 6.

6. Sky motion facts and myths+

   Classify sky-motion claims (e.g. 'sun circles Earth,' 'Earth spins,' 'Earth orbits') as accurate or a documented misconception.

7. Predicting future sunrise times+

   Predict the sunrise time for a future date not in a given data table, based on the observed pattern.

8. Explaining a new city's daylight+

   Construct a written, data-based explanation of an unfamiliar city's seasonal sunrise/sunset pattern, with no diagram provided, citing Earth's motion and the sun as energy source.

The year closes by asking whether the brightest-looking star has to be the most powerful one. Using a flashlight before any diagrams or numbers, your child learns that how bright a star looks depends on both how bright it truly is and how far away it is. They build a scale model relating the sun's size to the true distance of the nearest star, and use Earth's rotation versus its orbit to explain why the same constellations return each year.

1. What apparent brightness means+

   State that a star's apparent brightness is how bright it looks from Earth.

2. Why the sun looks brightest+

   Explain why the sun looks far brighter than any other star, using distance.

3. Distance and true brightness together+

   Compare two stars' apparent brightness given their true brightness and relative distance.

4. Sun and nearest star model+

   Construct a scale model relating a shrunken sun size to the correctly scaled distance of the nearest star.

5. Spin and orbit sky patterns+

   Differentiate Earth's daily rotation from its yearly orbit as causes of two different sky patterns.

6. Why constellations return each year+

   Explain why the same constellations appear at the same time each year, using Earth's orbital position.

7. Arguing brightness with a model+

   Argue, using a scale-distance model, why a nearby dim star can look brighter than a distant powerful one.

8. Sorting night sky evidence+

   Classify a set of night-sky observations as evidence of Earth's rotation or Earth's orbit.

9. Presenting your brightness claim+

   Present a brightness-distance claim orally, responding to a partner's question about the model.