Glossaries and Bold Words
Exploring how glossaries and bolded words help readers understand new vocabulary in informational texts.
Key Questions
- Justify the author's choice to bold certain words in a text.
- Explain how using a glossary improves comprehension of a topic.
- Construct a mini-glossary for a short informational passage.
Ontario Curriculum Expectations
About This Topic
Physical Changes focuses on how heating and cooling can alter the properties of materials. Students observe how solids can turn into liquids (melting) and liquids into solids (freezing), and how these changes can sometimes be reversed. This topic is a key component of the Ontario Grade 2 curriculum, as it helps students understand the relationship between temperature and the state of matter. It also introduces the idea that some changes, like burning or cooking an egg, are permanent, while others, like melting an ice cube, are not.
By exploring these changes, students learn to make predictions and record observations over time. This topic is particularly effective when students can engage in hands-on modeling and real-time observation. When students work in groups to see which material melts fastest or how a liquid changes as it cools, they are directly experiencing the cause-and-effect nature of science. These active experiences help them grasp that 'change' is a process that can be measured and described.
Active Learning Ideas
Inquiry Circle: The Melting Race
Small groups are given an ice cube, a piece of chocolate, and a crayon. They place them in a sunny spot and predict which will melt first, recording the time it takes for each to change state.
Think-Pair-Share: Reversible or Not?
Show images of a melted popsicle, a burnt piece of toast, and a folded paper. Students think about which can be changed back, pair up to explain their reasoning, and share with the class.
Stations Rotation: Temperature Effects
Stations include 'Warm Water vs. Cold Water' for dissolving, 'Modeling Clay' (softening with hand heat), and 'Freezing Juice' (observing results from the previous day). Students record how heat changed each item.
Watch Out for These Misconceptions
Common MisconceptionMelting and dissolving are the same thing.
What to Teach Instead
Students often say sugar 'melts' in water. Use a side-by-side comparison: an ice cube melting (heat only) and sugar dissolving (requires a liquid). Peer discussion helps clarify that melting is a change of state, while dissolving is mixing.
Common MisconceptionEverything that melts can be turned back into a solid.
What to Teach Instead
While many physical changes are reversible, students might think all heat-related changes are. Discussing 'cooking' versus 'melting' helps them see that some heat changes the material's nature permanently.
Suggested Methodologies
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Frequently Asked Questions
How does this topic connect to the Ontario environment?
What is the best way to demonstrate reversible changes?
How can active learning help students understand physical changes?
Why do some things melt faster than others?
Planning templates for Language Arts
ELA
An English Language Arts template structured around reading, writing, speaking, and language skills, with sections for text selection, close reading, discussion, and written response.
unit plannerThematic Unit
Organize a multi-week unit around a central theme or essential question that cuts across topics, texts, and disciplines, helping students see connections and build deeper understanding.
rubricSingle-Point Rubric
Build a single-point rubric that defines only the "meets standard" level, leaving space for teachers to document what exceeded and what fell short. Simple to create, easy for students to understand.
More in Information Detectives: Non-Fiction and Inquiry
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Interpreting Captions and Diagrams
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