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. The particle composition of matter+

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

2. States of matter: solid, liquid, gas+

   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 as space-occupying matter+

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

4. Weight of gases+

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

5. Relative particle spacing across states of matter+

   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. Evaporation explained by particle escape into air+

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

7. The term 'particle' in context+

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

8. Conservation of particles when matter appears 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. Main claim and evidence in an informational text 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 from Unit 1+

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

2. Conservation of weight during dissolving+

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

3. The distinction between 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. Conservation of matter during dissolving, explained by particles+

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

5. The balance-weighing procedure for a before/after conservation test+

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

6. Matching a separation method to a mixture type+

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

7. A before/after weight data set from a dissolving trial+

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

8. Conservation of weight applied to an unmixed, untaught combination+

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

9. Reversibility as a shared property across mixtures and solutions+

   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. The definition of physical change as same-substance change, applied to novel examples+

   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. The definition of chemical change as new-substance formation, applied to novel examples+

   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. The substance-identity test applied to demonstrated changes+

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

4. The insufficiency of a single piece of evidence (color) for classifying change type+

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

5. The independence of change type from reaction speed+

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

6. The four categories of observable evidence for chemical change+

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

7. Conservation of matter during a sealed chemical 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. Physical versus chemical classification of novel household examples+

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

9. Written justification distinguishing dissolving from true chemical change+

   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. The raw materials and observable inputs of photosynthesis+

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

2. The labeled parts of a photosynthesis diagram (inputs, outputs, and new substance)+

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

3. The source of a plant's added mass during growth+

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

4. Photosynthesis and decomposition as instances of chemical change+

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

5. Matter movement through a producer-consumer-decomposer chain+

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

6. The distinction between energy flow and matter cycling in an ecosystem+

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

7. The fate of matter in decomposing organic material+

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

8. The source of a growing bean plant's mass, as a claim-evidence-reasoning argument+

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

9. Matter movement during decomposition of an unfamiliar organism+

   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, their names, and example items belonging to each+

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

2. Features of a landscape sorted by Earth system+

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

3. Boundaries where two Earth systems meet in a landscape photo+

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

4. Evaporation as a matter exchange between hydrosphere and atmosphere+

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

5. Matter and energy exchange across systems during 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. The general pattern of cross-system cause and effect, compared across two cases+

   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. The first Earth system directly affected by a specified human activity+

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

8. System-interaction effects of a volcanic eruption+

   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. A shared claim across two texts about human impact on Earth systems+

   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. The proportion of Earth's water that is ocean salt water+

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

2. The four water cycle stage names as presented on the taught diagram+

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

3. Categories of Earth's water reservoirs by salinity and state+

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

4. Graphed percentages of Earth's water reservoirs+

   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. Evaporation as water particles moving into the air as invisible vapor+

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

6. The four-stage water cycle sequence applied to a new diagram layout+

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

7. Water movement between hydrosphere, atmosphere, and geosphere+

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

8. A scaled liquid model of Earth's water distribution+

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

9. A written scarcity claim grounded in a proportional water model+

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

10. Transfer of water between reservoirs under a changed condition+

    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 as Earth's primary energy source for weather and the water cycle+

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

2. Earth's rotation as the cause of the day/night cycle+

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

3. The distinction between Earth's daily rotation and yearlong revolution+

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

4. A season's sunrise/sunset time data table+

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

5. The causal link between Earth's motion and seasonal day-length patterns+

   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. Common claims about the cause of day/night and seasons+

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

7. Trend extrapolation in sunrise-time data+

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

8. An unfamiliar city's seasonal daylight-pattern data set+

   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. The definition of apparent brightness+

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

2. The relationship between the sun's brightness and its distance from Earth+

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

3. The joint effect of distance and true brightness on apparent brightness+

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

4. Proportional scale distance between the sun and the nearest star+

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

5. Rotation versus orbit as distinct motions with distinct sky effects+

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

6. The yearly recurrence of constellation visibility+

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

7. The causal argument connecting apparent brightness, true brightness, and distance+

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

8. Sky observations sorted by underlying Earth motion+

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

9. The apparent-brightness-versus-distance claim, presented orally+

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