Plant Life Cycle Observations Worksheet
This plant life cycle observations worksheet has 4th grade students read a pea plant log, graph its height, and explain its growth. An answer key is included for quick checking.
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About this resource
Description
Plants go through a life cycle: a seed sprouts, grows into a seedling, becomes an adult plant that flowers, and then makes new seeds. This plant life cycle observations worksheet lets students follow that whole journey through the eyes of a young scientist, using real measurements to see how a plant changes from one stage to the next.
On this 4th grade plant life cycle worksheet, students read Naomi’s observation log for a pea plant she grew for forty days. Each row gives the day, the plant’s height in centimeters, and what she saw. Students then plot every height on a line graph, connect the points, and answer questions that ask them to compare growth, explain why the plant did not show above the soil at first, and describe how pea pods help the life cycle begin again. Use it after a lesson on plant growth, alongside a class seed-planting project, or as science center practice.
What’s Included
- An observation log table with six dated entries
- A line graph for plotting plant height over forty days
- Three questions about growth, germination, and seeds
- A complete answer key with the finished graph
Why This Worksheet Helps Kids
- It connects the stages of a plant life cycle to real observations and data.
- Graphing the heights builds math skills that scientists use every day.
- The written questions ask students to explain their thinking with evidence from the log.
Ideas for Teachers and Parents
Before handing out the plant life cycle observations worksheet, plant a few pea or bean seeds in clear cups so students can keep their own observation logs. Have partners compare their own graphs with Naomi’s graph and talk about why the lines might look different. At home, families can measure a houseplant or garden seedling once a week and graph the results together.
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