Growing Plants Investigation

Grade Level: 2nd Grade

Duration: 45 minutes

Class Size: 23 students

Subject: Science

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Standards Alignment

Next Generation Science Standards (NGSS):

• 2-LS2-1: Plan and conduct an investigation to determine if plants need sunlight and water to grow.

Common Core State Standards (CCSS) Connections:

• CCSS.ELA-LITERACY.SL.2.1: Participate in collaborative conversations with diverse partners about grade 2 topics and texts with peers and adults in small and larger groups.
• CCSS.ELA-LITERACY.W.2.8: Recall information from experiences or gather information from provided sources to answer a question.

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Learning Objectives

By the end of the lesson, students will be able to:

1. Understand the basic needs of plants—specifically sunlight and water—for growth.
2. Plan and carry out a simple scientific investigation using a decaying pumpkin as a plant source.
3. Observe and record data about plant growth under different conditions of sunlight and water.
4. Communicate their findings verbally and through drawing or writing.

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Materials Needed

• 4 small sections of a decaying pumpkin (approximately 6”x6” pieces)
• Clear plastic containers or small planting trays (4)
• Potting soil
• Watering cans or cups with water
• Labels or sticky notes and markers
• Rulers (optional, for observation)
• Science observation journals or worksheets (simple chart with sections for drawing and notes)
• Chart paper or whiteboard
• Markers

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Lesson Flow

1. Introduction (5 minutes)

• Engage: Show the class a decaying pumpkin and ask, “What do you notice about this pumpkin?”
• Introduce the question: "Do plants need sunlight and water to grow?"
• Explain that today we will investigate this question using parts of a pumpkin.

2. Setting Up the Investigation (10 minutes)

• Explain the experiment variables:
  • One pumpkin piece will get sunlight and water
  • One pumpkin piece will get sunlight but no water
  • One pumpkin piece will get water but no sunlight (cover with a box or put in a dark space)
  • One pumpkin piece will get no sunlight and no water
• Divide students into small groups (5 groups with 4-5 students each) and assign roles: reporter, recorder, material distributor.
• Together, plant each pumpkin piece in separate containers with soil and label them clearly with the group’s help.
• Water the designated pumpkin pieces accordingly.

3. Guided Observation and Prediction (10 minutes)

• Ask students to make predictions about what will happen to each pumpkin piece. Record predictions on chart paper.
• Have students draw or write their predictions in their science journals.
• Discuss what sunlight and water do for plants to prepare their thinking for observation.

4. Observation and Recording (15 minutes)

(This step includes a demonstration since the real growth will take days)

• Show pictures or short videos of actual pumpkin or plant seedlings grown under different conditions to stimulate understanding (optional multimedia).
• Students observe the pumpkin pieces and note any changes in texture, color, mold presence, or other changes. Use their journals to record observations.
• Discuss as a class what these observations mean in terms of the plant’s needs.
• Reinforce that even though the pumpkin is decaying, we can learn how important sunlight and water are for plants to stay healthy.

5. Conclusion and Reflection (5 minutes)

• Review the original question: Do plants need sunlight and water to grow?
• Have students share their findings and whether their predictions were correct.
• Write a class conclusion on the board based on students’ observations and scientific reasoning.

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Assessment

• Formative: Observation journal entries including predictions, drawings, and notes; active participation in discussion and experiment setup.
• Summative: A simple exit slip where each student answers: “What do plants need to grow? How do sunlight and water help?” with a drawing or a sentence.

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Differentiation and Extensions

• For students needing support: Provide sentence starters and visual aids (e.g., pictures of water and sun). Pair with a peer buddy for discussion.
• For advanced students: Encourage them to suggest additional variables that may affect plant growth (soil type, temperature). Introduce the idea of a control group explicitly.
• Home Connection: Suggest families try growing a small plant or seeds at home and observe how sunlight and water affect it.

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Teacher Reflection

• Were students engaged and able to make connections between the investigation and plant needs?
• Did students participate actively and use scientific vocabulary?
• Consider incorporating more digital tools or time-lapse photos for future lessons to visualize growth over time.

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This structured, age-appropriate investigation targeted to 2nd graders ensures students use inquiry to discover critical plant needs, meeting NGSS and supporting key Common Core literacy skills. The use of a decaying pumpkin makes the experiment tangible and relatable while sparking curiosity.