Grade 5 Science: Unit 2 | Matter, Changes and Conservation
Five original instructional lessons. This builds on Unit 1 but is not a full annual course. Read the text and modeled explanation before attempting the independent workbook.
Day 1: Properties of matter
Read and understand
Matter has mass and takes up space. Materials can be identified using observable or measurable properties such as density, hardness, solubility and thermal conductivity. A material’s appearance alone may be insufficient for identification.
Teach and model
When describing samples, write what was actually observed. Do not invent measurements. A testable property must have a clear method and unit where appropriate.
Guided check
Restate the learning target and explain one example using the reading. Ask a parent to check the reasoning, then complete the independent questions.
Complete eight Day 1 items in the companion workbook.
Day 2: Dissolving and mixtures
Read and understand
When sugar dissolves in water, it becomes dispersed in the water. Dissolving is not the same as disappearing. Mixtures contain more than one substance. Some can be separated using physical properties such as particle size or evaporation, with proper safety precautions.
Teach and model
A solution can be clear but still contain dissolved matter. Do not taste science materials. Experiments should use food-safe household items, with adult guidance.
Guided check
Restate the learning target and explain one example using the reading. Ask a parent to check the reasoning, then complete the independent questions.
Complete eight Day 2 items in the companion workbook.
Day 3: Physical and chemical changes
Read and understand
A physical change affects form or state without changing what the substance is. Melting ice is a physical change. A chemical change forms new substances; signs may include a color change, gas production or temperature change, but no single sign alone proves a reaction.
Teach and model
Evidence should distinguish observations from explanations. Do not direct students to combine household chemicals. Use photographs, written scenarios and safe observation instead.
Guided check
Restate the learning target and explain one example using the reading. Ask a parent to check the reasoning, then complete the independent questions.
Complete eight Day 3 items in the companion workbook.
Day 4: Conservation in closed systems
Read and understand
Matter is conserved in ordinary physical and chemical changes: it is not created or destroyed by the process. When a container is open, a gas may leave, making the measured contents seem lighter even though the gas is still matter.
Teach and model
A closed-system model tracks all matter before and after a process. Never seal or heat containers that may build pressure. Use thought experiments or teacher-selected safe materials.
Guided check
Restate the learning target and explain one example using the reading. Ask a parent to check the reasoning, then complete the independent questions.
Complete eight Day 4 items in the companion workbook.
Day 5: Independent matter assessment
Read and understand
A fictional classroom sample consists of 120 grams of water and 15 grams of dissolved sugar. Assume none spills or escapes. The total sample mass is 135 grams. No real experiment is being reported.
Teach and model
Use the given example to reason about mixtures, measurement and conservation. Show calculations and distinguish observed from hypothetical data.
Guided check
Restate the learning target and explain one example using the reading. Ask a parent to check the reasoning, then complete the independent questions.
Complete eight Day 5 items in the companion workbook.
Unit 2 is complete as a five-day online lesson set, not as a 36-week Grade 5 course.