Life Needs of Plants

Overview

This 60-minute lesson is designed for Year 3 students to explore the essential requirements for plant life and growth, focusing on air, light, water, nutrients, and space. Through inquiry-based, hands-on activities, children will develop their scientific understanding and investigative skills by observing how these needs vary among different flowering plants. This is Lesson 2 of 6 in the unit Flowering Plants Uncovered.

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Curriculum Links

National Curriculum for England – Science (Key Stage 2, Years 3 and 4)

Plants

• Pupils should be taught to:
  • identify and describe the functions of different parts of flowering plants: roots, stem/trunk, leaves, and flowers
  • explore the requirements of plants for life and growth (air, light, water, nutrients from soil, and room to grow) and how they vary from plant to plant
  • investigate the way in which water is transported within plants
  • explore the plant life cycle

Key Learning Objectives

By the end of this lesson, pupils will be able to:

1. List the five essential life needs of plants: air, light, water, nutrients, and space.
2. Explain why each of these needs is important for plant growth and survival.
3. Observe how different plants have different needs or preferences for these life requirements.
4. Collect and record observations from simple investigations involving plant growth conditions.
5. Use scientific vocabulary to describe plant needs and explain findings.

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Resources Needed

• Variety of flowering plants (e.g., sunflower, ivy, bean plant, cactus)
• Small growing containers or pots (3 per group)
• Soil and compost
• Watering cans or bottles
• Clipboards, worksheets for observation notes
• Natural light source or lamps for indoor light variation activity
• Clear plastic bags (to simulate air restriction)
• Magnifying glasses
• Visual aids/posters showing plant parts and growth needs
• Whiteboard and markers

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Lesson Breakdown

1. Starter Activity (10 minutes)

Engage & Activate Prior Knowledge

• Begin with a quick whole-class discussion: "What do plants need to live and grow?"
• Teacher asks pupils to shout out anything they know; teacher lists key ideas on the board but waits to confirm full list later.
• Show images of different flowering plants and ask: "Do all plants need the same things? Why might some plants grow better in one place than another?"
• Introduce the five life needs of plants: air, light, water, nutrients, and space.

National Curriculum link: Encourages recall and use of scientific vocabulary.

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2. Main Activity – Hands-On Exploration (35 minutes)

Group Setup

Divide class into 9 groups of 3 students. Each group receives:

• Three small potted plants of the same species (or use seedlings for uniformity)
• Resources to vary conditions (light, water amount, air, nutrients, space)

Investigation Stations (Each group rotates every 10 minutes approx)

Station 1: Light and Space

• One plant placed by window (light), one under lamp (artificial light), one in cupboard (dark).
• Observe and discuss space: each plant either has enough room or is crowded by other pots.

Station 2: Water and Nutrients

• One plant watered normally, one under-watered (little water), one with additional fertiliser/nutrients added.

Station 3: Air

• One plant covered loosely with a clear plastic bag (with small air holes), one with bag sealed tightly (low air), and one uncovered (normal air).

Task for Pupils in Groups

• Use magnifying glasses and worksheets to observe differences in leaves, stems, soil, and plant health.
• Record initial conditions and hypothesise what they expect to happen in 1-2 days.
• Discuss how each life need appears to affect plants differently.

_National Curriculum link:

• explore the requirements of plants for life and growth
• collect and record data to help in answering questions_

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3. Plenary – Sharing and Reflecting (10 minutes)

• Each group briefly shares key observations or predictions with the class (max 1-2 minutes each).
• Teacher highlights correct scientific vocabulary used: light, air, water, nutrients, space, growth, health.
• Recap the five life needs; emphasise how plants adapt to differing levels of resources.
• Optional: Set a follow-up task for pupils to monitor their own group’s plants over the next week and note any changes.

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Assessment & Differentiation

Formative Assessment

• Monitor group discussions—note who uses scientific vocabulary correctly.
• Review worksheets for completeness and accuracy of observations and explanations.
• Question pupils during plenary to assess understanding of concepts.

Differentiation

• Provide sentence starters / scaffolded worksheets for pupils who need support.
• More able pupils encouraged to explain why plants need each resource and to suggest how plants in different environments adapt to limited availability.
• Use visuals and physical examples to support pupils with EAL or additional needs.

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Extension ideas

• Challenge pupils to design their own mini experiment to test a plant’s preference for a life need not covered (e.g., different soil types).
• Explore specific adaptations of desert or rainforest plants relating to these life needs in a cross-curricular geography link.

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Teacher Notes

• Ensure safety when using sealed plastic bags; do not leave unattended.
• Have additional resources ready in case of plant damage or unexpected results.
• Use this lesson as a basis for ongoing observation for later lessons examining plant growth stages and transport of water.

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This structured and investigative lesson supports the National Curriculum’s aim of fostering scientific enquiry and understanding in Year 3 pupils, blending hands-on discovery with guided discussion to deepen knowledge about the life needs of flowering plants.