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Plant Life Cycle Observation

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Plant Life Cycle Observation

A community garden wants to know how a bean plant changes as it grows. Read the field notes and use the evidence to explain its life cycle. You can also plant a seed and add your own observations over time. A fair observation records what you actually see; do not invent results.

Decode the life cycle

A bean plant does not appear all at once. Its stages connect one generation to the next.

1.Number these stages from 1 (first) to 5 (last): flowering plant, seedling, new seed, germinating seed, mature plant growing leaves.

2.During germination, which part usually emerges from a bean seed first, and what does it help the young plant do?

3.A bean plant grows flowers and later produces pods. Explain how this helps the plant life cycle continue.

Read the garden team's evidence

The team planted three bean seeds in damp potting mix and kept them in a warm, bright place. They measured the tallest seedling once each week. These are the team's sample results.

Week

Observation

Height

Seed planted

0 cm

Shoot visible; two small leaves

4 cm

More leaves; stem taller

9 cm

Several leaves; stronger stem

15 cm

4.How many centimetres taller was the seedling in Week 3 than in Week 1?

5.Which week-to-week period showed the greatest increase in height: Week 0 to 1, Week 1 to 2, or Week 2 to 3? Show the change in centimetres.

6.What is the strongest conclusion supported by the team's observations?

The seedling grew taller during each recorded week.
Every bean plant always grows exactly 6 cm per week.
The seedling will produce flowers next week.
Sunlight alone caused all of the growth.

7.The team measured only one seedling. Give one reason they should grow and measure more than one seedling before making a general claim about bean plants.

Plan an observation

If you grow a seed, observe it safely and regularly. Keep the conditions as similar as possible when comparing plants.

8.You want to test whether the amount of light affects bean seedling growth. Name one factor to change, one factor to keep the same, and what you would measure.

9.A bean seed can begin germinating without being planted in soil, but it needs water. What does this tell you about the role of soil in the earliest stage of the life cycle?

10.Write two details you would record each week to track a bean plant's growth and life cycle. Include one measurement and one visible change.