Lesson Plan: Changes in Materials Caused by Heating and Cooling
Grade: 2nd Grade Subject: Science
TEK: 2.5B - Compare changes in materials caused by heating and cooling.
Objective: I will be able to compare changes in materials caused by heating and cooling by conducting simple experiments and making observations.
Introduction: 1. Begin the lesson by asking the students if they have ever noticed how some materials change when they are heated or cooled. 2. Show the students a picture or video of a candle melting or ice cubes melting to introduce the concept of changes in materials caused by heating and cooling. 3. Explain that today, we will be investigating different materials and how they change when they are heated or cooled.
Lesson Outline:
- Engage (5 minutes):
- Show a short video explaining the concept of heating and cooling materials.
- Ask the students to share any examples they can think of where materials change when heated or cooled.
- Explore (15 minutes):
- Divide the students into small groups.
- Provide each group with a set of materials such as ice cubes, candles, chocolate, crayons, and clay.
- Instruct the students to predict what will happen to each material when it is heated or cooled.
- Guide the students in conducting simple experiments, such as heating the crayons or cooling the clay, and ask them to observe and record any changes they notice.
- Encourage the students to discuss their observations within their groups.
- Explain (10 minutes):
- Bring the students back together as a whole class.
- Ask the students to share their observations and discuss the changes they noticed in the different materials.
- Explain that heating can cause some materials to melt, while cooling can cause some materials to solidify or freeze.
- Discuss the concept of reversible and irreversible changes in materials.
Questioning: - What happens to materials when they are heated? - What happens to materials when they are cooled? - Can you give an example of a reversible change in materials? - Can you give an example of an irreversible change in materials?
Assessment: - Observe students’ participation and engagement during the group experiments. - Review students’ recorded observations to assess their understanding of changes in materials caused by heating and cooling.
Differentiation: - Provide additional support to students who may struggle with the concept by conducting a demonstration as a whole class before the group experiments. - Pair students with different abilities together during the group experiments to encourage peer learning and support.
Plenary: - Show a short video summarizing the concept of changes in materials caused by heating and cooling. - Ask the students to share one thing they learned about changes in materials today.
Resources: 1. Video: “Changes in Materials Caused by Heating and Cooling” - [insert link] 2. Worksheet: “Investigating Changes in Materials” - [insert link]
Note: The video and worksheet resources can be found by searching for relevant content on educational platforms such as YouTube or educational websites.
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