Pumpkin Investigation | Pumpkin Life Cycle Science Activities STEM K-2

Pumpkin Investigation brings real pumpkin science into your K–2 classroom with hands-on observing, predicting, testing, measuring, counting, and recording! Students investigate a real pumpkin, explore the pumpkin life cycle, identify pumpkin parts, count ribs and seeds, test sink or float, and practice measurement while recording their discoveries in an interactive pumpkin-shaped activity.

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This pumpkin science resource gives you two flexible investigation formats so you can choose what works best for your class: an interactive pumpkin flipbook or a streamlined single-page investigation. Use one shared class pumpkin for a whole-group science lesson, set up small-group investigations, or use the activities with parent volunteers or science centers.

Students Will Investigate

Students get meaningful, hands-on practice as they:

• draw and observe a real pumpkin
• describe pumpkin shape and characteristics
• count the pumpkin’s ribs
• count and examine pumpkin seeds
• make a sink-or-float prediction
• test whether the pumpkin sinks or floats
• record their observation
• measure pumpkin height
• measure circumference
• weigh the pumpkin
• identify seeds, flesh, pulp, stem, leaf, vine, and shell
• explore the pumpkin life cycle
• record and discuss their results

The activities move beyond a basic pumpkin worksheet by giving students an opportunity to predict, test, observe, measure, compare, and record real data.

Two Investigation Formats

Choose the format that fits your students, schedule, and classroom setup.

Interactive Pumpkin Flipbook:

Students complete the investigation while building a hands-on pumpkin-shaped resource. Sections organize the learning into Observe & Describe, Sink or Float, Measure & Weigh, pumpkin parts, counting, and life cycle learning.

Single-Page Pumpkin Investigation:

Students record the same core science concepts on one easy-to-manage page. This option works especially well for small groups, science centers, parent volunteers, or classrooms that need a quicker format.

Real Pumpkin Science

Students work directly with a real pumpkin as they practice early scientific inquiry.

They make observations, ask questions, make predictions, conduct a simple sink-or-float test, use measurement tools, count objects, and record what happened.

This makes the activity a natural fit for pumpkin science, fall science, STEM activities, science centers, and October classroom learning.

Pumpkin Life Cycle

The included pumpkin life cycle component helps students connect their real pumpkin investigation to how pumpkins grow.

Students explore the sequence from:

seed → sprout → vine → flower → pumpkin

The interactive life cycle feature adds visual support while reinforcing plant science and seasonal vocabulary.

Math + Measurement Connections

This investigation naturally integrates early math skills into science.

Students can measure:

Height using cubes or classroom measurement tools

Circumference by measuring around the pumpkin

Weight using a classroom scale

Students also count ribs and seeds, compare observations, and record numerical information.

That makes this resource especially useful for teachers looking to combine pumpkin science and pumpkin math in one lesson.

Pumpkin Parts

Students explore and identify important pumpkin vocabulary, including:

stem • leaf • vine • shell • seeds • flesh • pulp

Use the labels during whole-group instruction, hands-on exploration, partner work, or while cutting open a real pumpkin.

Pumpkin Investigation works well for:

Kindergarten • 1st Grade • 2nd Grade • Pumpkin Units • Fall Science • October Activities • Science Centers • STEM Activities • Small Groups • Whole Group Science • Plant Life Cycle Lessons • Pumpkin Math and Measurement

Why This Resource Is Flexible

You do not need a pumpkin for every child.

Use one class pumpkin and complete the investigation together, or provide pumpkins to small groups for more hands-on participation. The two recording formats make it easy to adapt the same lesson for different classroom needs.

The resource is designed to give teachers the flexibility to make pumpkin science as simple or as hands-on as their classroom allows.

Skills Practiced

Science: observation, prediction, testing, plant life cycle, pumpkin parts, recording results

Math: counting, measurement, circumference, height, weight, comparison

STEM: questioning, investigating, testing ideas, using tools, discussing results

Literacy: science vocabulary, labeling, drawing, speaking, and written response

Grades: K–2

Subjects: Science • STEM • Math

Themes: Pumpkins • Fall • Plant Life Cycle • October

Pumpkin Investigation gives students a memorable way to explore pumpkin science through real observation and hands-on learning while reinforcing the pumpkin life cycle, measurement, counting, vocabulary, and beginning scientific inquiry.