You will learn
- Say where the stem is and what it looks like.
- Say that the stem holds the plant up.
- Say that the stem carries water to the leaves.
- Compare stems of different plants.
Version 0.2 · expanded edition · built from cited public sources Content is based on the official frameworks and sources listed under Sources and standards. No official endorsement is claimed. Written in the style of common primary school assessments. No exam result is promised.
Student lesson
- The stem holds the plant up.
- The stem carries water from the roots to the leaves.
- Stems can be thin and soft or thick and hard.
- A tree trunk is a stem.
Words to know
the part of a plant that holds up the leaves and flowers
the thick stem of a tree
to take from one place to another
the hard outside of a tree trunk
1. Discover: The coloured water
Kofi’s teacher puts a white flower in a cup of water with a few drops of red food colour. By the next day the petals have turned pink. “The coloured water travelled up the stem,” says the teacher.
Think: How did the colour get to the petals?
2. Understand: What the stem does
Idea 1: What the stem does
The stem holds up the leaves and flowers so that they can get light. The stem also carries water from the roots up to the leaves.
Idea 2: Different stems
Some stems are thin and soft, like the stem of a bean plant. Some are thick and hard, like a tree trunk. The outside of a tree trunk is called bark. Climbing plants have stems that wind around things.
Idea 3: Water in the stem
Inside the stem are tiny tubes. Water goes up through the tubes, from the roots to the leaves. We can see this when a stem stands in coloured water.
3. Worked examples
Example 1 (I show you): What holds the flower up?
A sunflower stands tall in a garden.
- Look at the plant.
- What part holds the flower up? The stem.
- Why is that useful? The leaves and flower can get light.
Answer: The stem holds the leaves and flower up to the light.
Example 2 (We do it together): Which stem?
A bean plant and a tree.
- Which stem is thin and soft? The bean.
- Which is thick and hard? The tree trunk.
- What is the outside of a tree trunk called? Bark.
Answer: Bean: thin and soft. Tree: thick and hard, with bark.
Example 3 (You try): Where does the water go?
A white flower stands in red-coloured water.
Show the steps and answer
- Water goes up the stem.
- The petals take up the colour.
- What do we see after a day? Pink petals.
Answer: The petals turn pink because water travels up the stem.
Did you know?
Bamboo is a very fast-growing plant. Some kinds can grow taller by many centimetres in a single day.
Why this matters
Stems keep plants upright and move water, so plants can reach the light and stay alive.
4. Explore: Coloured water
An adult helps. Put a white flower or a celery stalk in a cup of water with a little food colour.
- An adult cuts the bottom of the stem and puts it in the coloured water.
- Draw the flower or celery now.
- Look again after one day and draw it again.
- Say what changed and why.
Think about it: what did you notice?
What changed? The water travelled up the stem.
5. Practise
Say it in a sentence
Use these starters when you talk about the lesson. Say them out loud.
- The stem holds ___.
- Water goes up the ___.
- A thin stem is ___.
- A tree trunk is a ___.
Guided practice
Question 1. What part holds the plant up?
The stem.
Question 2. What does the stem carry?
Water.
Question 3. What is the outside of a tree trunk called?
Bark.
Independent practice
Level 1: Start
- What part holds the plant up?
- What does the stem carry?
- What is the outside of a tree trunk called?
- Is a tree trunk a stem?
- Is the stem of a bean thin or thick?
Level 2: Grow
- Where does the water go after the roots take it in?
- Name two kinds of stems.
- Why do plants need stems to hold leaves up?
Level 3: Stretch
- Explain what happens to a white flower in coloured water.
- Compare a bean stem and a tree trunk.
- Draw a plant and label the stem, a root and a leaf.
Answers are in the answer key below. Try first, then check.
6. Apply: Science in everyday life
Which plants near you have thick stems? What are they used for?
Show a sample answer
Trees. Wood is used for building and cooking fires.
Another one. Tell a family member one thing from this lesson. Use the words you learned.
Show a sample answer
A clear sentence that uses at least one word from Words to know.
7. Common mistakes
Fix: The stem holds the plant up and carries water.
Fix: Roots take in water and the stem carries it up to the leaves.
8. Lesson summary and revision card
- I can say where the stem is and what it looks like.
- I can say that the stem holds the plant up.
- I can say that the stem carries water to the leaves.
- I can compare stems of different plants.
9. Check and master
Answer all 14 questions. You will see feedback after each one.
Your result appears here after you answer every question.
10. Key takeaways
- The stem holds the plant up.
- The stem carries water from the roots to the leaves.
- Stems can be thin and soft or thick and hard.
- A tree trunk is a stem.
11. Next lesson
Next lesson: Leaves. Keep going with the next idea in this course.
Exam practice
These questions are written in the style of common school and international primary assessments. Try them on your own, without looking back. Then check your answers in the marking guide. The marks are shown in brackets.
- What does the stem do? [2 marks]
- What is bark? [1 mark]
- Compare a bean stem and a tree trunk. [2 marks]
- A white flower is put in red water. What will happen? Why? [3 marks]
- Draw a plant and label the stem. [2 marks]
Total: 10 marks.
Marking guide and model answers
- Holds the plant up [1]; carries water to the leaves [1]
- The outside of a tree trunk [1]
- Bean: thin and soft [1]; tree: thick and hard [1]
- The petals turn pink [1]; water goes up the stem [1]; the stem carries water [1]
- A plant [1]; the stem labelled [1]
Score guide: 9 to 10 = secure. 6 to 8 = nearly there, revise the parts you missed. Under 6 = work through the lesson again with a grown-up.
Printable worksheet
- What part holds the plant up?
- What does the stem carry?
- What is the outside of a tree trunk called?
- Is a tree trunk a stem?
- Is the stem of a bean thin or thick?
- Where does the water go after the roots take it in?
- Name two kinds of stems.
- Why do plants need stems to hold leaves up?
- Explain what happens to a white flower in coloured water.
- Compare a bean stem and a tree trunk.
Homework
Look at three stems at home or outside, such as a bean, a tree and grass. Draw them and write thin or thick for each.
Answer key and marking scheme
| Question | Expected response | Marks |
|---|---|---|
| 1. What part holds the plant up? | The stem. | 1 |
| 2. What does the stem carry? | Water. | 1 |
| 3. What is the outside of a tree trunk called? | Bark. | 1 |
| 4. Is a tree trunk a stem? | Yes. | 1 |
| 5. Is the stem of a bean thin or thick? | Thin. | 1 |
| 6. Where does the water go after the roots take it in? | Up the stem to the leaves. | 1 |
| 7. Name two kinds of stems. | Thin and soft, or thick and hard. | 1 |
| 8. Why do plants need stems to hold leaves up? | Leaves need light. | 1 |
| 9. Explain what happens to a white flower in coloured water. | Water goes up the stem and colours the petals. | 1 |
| 10. Compare a bean stem and a tree trunk. | Bean: thin and soft. Tree: thick and hard. | 1 |
| Total | 10 |
Independent practice answers. Level 1: 1 The stem.; 2 Water.; 3 Bark.; 4 Yes.; 5 Thin.. Level 2: 1 Up the stem to the leaves.; 2 Thin and soft, or thick and hard.; 3 Leaves need light.. Level 3: 1 Water goes up the stem and colours the petals.; 2 Bean: thin and soft. Tree: thick and hard.; 3 A labelled drawing..
Quiz answers: 1 B, 2 C, 3 A, 4 B, 5 C, 6 A, 7 B, 8 C, 9 A, 10 B, 11 C, 12 A, Challenge 1 B, Challenge 2 C.
Mastery and remediation
| Objective | Bronze (Developing) | Silver (Proficient) | Gold (Advanced) |
|---|---|---|---|
| O1 Say where the stem is and what it looks like | Shows this with help from an adult or a picture | Does this independently and explains how they know | Explains it clearly and uses it in a new situation |
| O2 Say that the stem holds the plant up | Shows this with help from an adult or a picture | Does this independently and explains how they know | Explains it clearly and uses it in a new situation |
| O3 Say that the stem carries water to the leaves | Shows this with help from an adult or a picture | Does this independently and explains how they know | Explains it clearly and uses it in a new situation |
| O4 Compare stems of different plants | Shows this with help from an adult or a picture | Does this independently and explains how they know | Explains it clearly and uses it in a new situation |
Courseversity badge thresholds (overall quiz score): Gold = 90–100%; Silver = 80–89.9%; Bronze = 70–79.9%. A badge is never a full record of progress.
If a learner struggles
- Find the misconception: “The stem is only for decoration.” The stem holds the plant up and carries water.
- Explain another way: use real objects, pictures or actions first, then words.
- Show a simpler example: Use one real plant. Point to the stem and say that it holds up the leaves.
- Guided practice: work through one example together and let the learner try the next one.
- Reassess: use the quiz again or the worksheet.
- Move on when the learner shows Silver-level evidence independently.
For parents and guardians
In this lesson your child learns that the stem holds the plant up and carries water to the leaves. You do not need to be an expert to help.
- Try the coloured water test at home with an adult.
- Ask, “Where did the colour go?”
- Look at stems on a walk and say thin or thick.
- Ask “how do you know?” after each answer, and listen.
- Praise effort, not only right answers. Mistakes are how we learn.
- Ten to fifteen minutes a day is better than one long session.
Teacher package
1–5. Objectives, prerequisites, materials, preparation, duration
Lesson objectives. Learners will: say where the stem is and what it looks like; say that the stem holds the plant up; say that the stem carries water to the leaves; compare stems of different plants.
Prerequisite knowledge. None. Learners should be able to look, listen and talk about what they notice.
Materials. White flowers or celery stalks, cups, water, red food colour, chart paper, pencils and crayons. Low-resource options: use chalk or charcoal on a board or wall, drawings in the sand, and objects from the classroom instead of printed materials.
Preparation. Prepare coloured water in cups. Cut the stems yourself. Gather pictures of a bean plant and a tree trunk.
Suggested duration. 45–60 minutes. It can be split into two shorter sessions.
6–9. Teaching procedure, explanation notes, guided and independent activities
Introduction (5 min). Show a plant and ask, “What holds the leaves and flower up?”
Explanation (10 min). Teach the jobs of the stem and compare stems.
Guided activity (10 min). Set up coloured water and draw Day 1.
Independent activity (10 min). Next day, look again and say what changed.
Assessment and reflection (5 min). Ask each learner to say one thing they learned and how they know it.
Key questions. What does the stem do? Where does the water go?
Teacher explanation notes. Start with real objects and safe, hands-on observation. Then talk about what was seen, then draw and write. Always say “how do you know?”. Keep to the safety notes, and use local, safe materials.
10–12. Differentiation, formative assessment, common misconceptions
Support. Use real objects and pictures, short sentences and a partner. Let learners point, show or draw instead of writing. Extension. Ask learners to find a new example at home and explain how they know.
Formative assessment. Listen to learners read and explain, ask “how do you know?”, and check the independent work.
Misconceptions. “The stem is only for decoration.” The stem holds the plant up and carries water.
13–15. Assessment questions, answer keys, marking scheme
Use the quiz, the 10-mark exam practice and the worksheet on this page. All answers and marking guides are in the answer sections above. Re-check every answer before use.
16–19. Remediation, enrichment, homework, teacher reflection
Remediation. Use one real plant. Point to the stem and say that it holds up the leaves. Enrichment. Look for one new example near your home or school, draw it and explain it to someone. Homework. See above.
Teacher reflection. After teaching, record: which ideas learners understood; which misconceptions occurred; which activities worked; which learners need more practice; and what to improve next time.
Sources and standards
This lesson is based on the sources below, and no official endorsement is claimed. Reference starting points: Next Generation Science Standards, Cambridge Primary Science and the IB Primary Years Programme. Where a standard code is named, it points to the official framework.
Research used to shape this lesson. Courseversity Science curriculum, Grade 1 Unit 3, topic 4; Next Generation Science Standards, from molecules to organisms (structures and functions of plants); Cambridge Primary Science Stage 1, plants; IB Primary Years Programme, how the world works. These sources informed the lesson.