### 2nd Grade Science Lesson Plan: States of Matter
#### Objective:
Students will understand the three primary states of matter (solid, liquid, gas) and be able to identify examples of each state in everyday life.
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#### Duration:
1 hour
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#### Materials:
- Ice cubes
- Water in a clear container
- Kettle or microwave to heat water
- Balloons
- Ball
- Chart paper and markers
- Drawing paper and crayons
- Access to a sink or water source
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#### Standards:
- NGSS 2-PS1-1: Plan and conduct an investigation to describe and classify different kinds of materials by their observable properties.
- NGSS 2-PS1-4: Construct an argument with evidence that some changes caused by heating or cooling can be reversed and some cannot.
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#### Introduction (10 minutes):
1. **Greeting and Introduction**:
- Welcome the students.
- Introduce the topic: States of Matter.
- Ask students if they can name the three states of matter.
2. **Discuss and Explain**:
- Solid: something that keeps its shape (show a ball).
- Liquid: something that takes the shape of its container (show water in a container).
- Gas: something that fills all the space inside a container (discuss air in a balloon).
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#### Activity 1: Demonstration (15 minutes):
1. **Solid to Liquid**:
- Show an ice cube and explain it is a solid.
- Put the ice cube in a bowl and let it melt (show that it changes from solid to liquid).
2. **Liquid to Gas**:
- Heat water in a kettle or microwave to create steam.
- Explain that the water is turning from a liquid to a gas (steam).
#### Activity 2: Hands-On Experiment (20 minutes):
1. **Material Distribution**:
- Hand out balloons to each student.
- Have students fill their balloons with air and then release the air to observe gas in action.
2. **Observation and Discussion**:
- Ask students to observe and describe what happens when the balloons release air.
- Discuss that the balloon was full of gas (air) and when released, it filled the room.
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#### Group Work: Chart Making (10 minutes):
1. **Divide Class into Groups**:
- Each group creates a chart with three columns for Solids, Liquids, and Gases.
2. **Brainstorming**:
- Students draw or write examples of each state of matter in the appropriate column.
- Examples: Solid (rock, pencil), Liquid (juice, rain), Gas (cloud, air in tires).
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#### Conclusion and Review (5 minutes):
1. **Review Key Concepts**:
- Reiterate the three states of matter: solid, liquid, gas.
- Discuss what they observed during the activities.
2. **Questions and Answers**:
- Take a few questions from students.
- Encourage them to share one new thing they learned today.
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#### Assessment:
- **Informal Assessment**:
- Observe students during activities to see if they correctly identify and classify the states of matter.
- **Exit Ticket**:
- Have students draw one example of a solid, liquid, and gas on a paper to turn in.
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#### Extension:
- **At-Home Experiment**:
- Ask students to find one solid, liquid, and gas at home and share with the class the next day.
#### Notes for Teacher:
- Ensure safety when heating water.
- Be ready to assist students in filling balloons.
- Reflect on the lesson to adjust for future lessons based on student engagement and understanding.