Reversible and Irreversible Changes: a full term of science
Ten ready-to-teach lessons for Year 6 Chemical sciences. Print this pack and the term is prepared: every lesson has a plan, talk prompts, a student worksheet, cards or tickets, and answers.
Start here: five minutes to Monday
- Skim the term at a glance on the next page.
- Print the lesson you need (plan, worksheet, cards).
- Gather everyday items under You need on the plan.
- Open the free interactive unit on your board.
- Teach from the plan: timings, prompts and answers are on one page.
No science background needed
Written for the busy generalist teacher. Plain words, common muddles, and model answers are on every plan. Safety: no open flames or boiling water unless an adult controls a warm-water step named on the plan.
The term at a glance
One lesson a week for a term. Run in order where you can.
| # | Lesson | Children learn and do | On screen |
|---|---|---|---|
| 1 | Sort the changes | Explore the idea with talk, board and hands-on work | Sort the changes |
| 2 | Dissolving sugar is reversible | Explore the idea with talk, board and hands-on work | Dissolving sugar is reversible |
| 3 | Changing state is reversible | Explore the idea with talk, board and hands-on work | Changing state is reversible |
| 4 | Cooking an egg is irreversible | Explore the idea with talk, board and hands-on work | Cooking an egg is irreversible |
| 5 | Rusting is irreversible | Explore the idea with talk, board and hands-on work | Rusting is irreversible |
| 6 | Deeper look: Sort the changes | Explore the idea with talk, board and hands-on work | Sort the changes |
| 7 | Deeper look: Dissolving sugar is reversible | Explore the idea with talk, board and hands-on work | Dissolving sugar is reversible |
| 8 | Deeper look: Changing state is reversible | Explore the idea with talk, board and hands-on work | Changing state is reversible |
| 9 | Deeper look: Cooking an egg is irreversible | Explore the idea with talk, board and hands-on work | Cooking an egg is irreversible |
| 10 | Show what we know | Explore the idea with talk, board and hands-on work | Reversible and Irreversible Changes |
Curriculum links (Australian Curriculum V9)
The term teaches AC9S6U04. Lessons also work these Inquiry and Human Endeavour descriptors:
Assessment
- Every plan ends with answers and look-fors.
- The assessment kit near the front has a rubric and class checklist.
- Lesson 10 is the summative check and model task.
Materials for the whole term
One gathering session covers all ten lessons. Prefer classroom and home items. No science cupboard required. Adult handles any warm water.
| Lesson | You need |
|---|---|
| 1 | everyday classroom items named on the Day 1 plan; interactive unit open |
| 2 | everyday classroom items named on the Day 2 plan; interactive unit open |
| 3 | everyday classroom items named on the Day 3 plan; interactive unit open |
| 4 | everyday classroom items named on the Day 4 plan; interactive unit open |
| 5 | everyday classroom items named on the Day 5 plan; interactive unit open |
| 6 | everyday classroom items named on the Day 6 plan; interactive unit open |
| 7 | everyday classroom items named on the Day 7 plan; interactive unit open |
| 8 | everyday classroom items named on the Day 8 plan; interactive unit open |
| 9 | everyday classroom items named on the Day 9 plan; interactive unit open |
| 10 | everyday classroom items named on the Day 10 plan; interactive unit open |
Safety in one look
- No open flames, hotplates or boiling water for children.
- Adult pours warm water when a plan needs heat.
- Wipe spills; keep floors clear.
- Food allergy checks before any tasting stations.
Assessment without extra work
Lesson plans carry look-fors. Lesson 10 is summative. Use this sheet for ongoing notes.
The three levels
| Idea | Working towards | At standard | Beyond |
|---|---|---|---|
| Big idea | names an example with help | explains the unit idea in Year 4 words | applies the idea to a new example |
| Evidence | guess only | links a claim to something observed or measured | compares two pieces of evidence |
| Science words | everyday words only | uses unit words correctly | explains a word to a partner |
| Inquiry habit | follows steps with support | plans or records with the scaffolds | improves a plan after a first try |
Class observation checklist
| Name | Idea | Evidence | Words |
|---|---|---|---|
A tick a lesson is plenty.
Word wall cards
Cut out and build the wall as words arrive across the term.
notice with our senses
write or draw what we found
a good guess with a reason
change one thing, keep the rest the same
what we measured or saw
something that happens again
a feature we can observe
a push or a pull
what something is made of
where a living thing lives
a pattern that goes round again
say what the evidence shows
Dear families
This term in science, Year 6 explores reversible and irreversible changes. We use observation, simple tests and clear science words. Ask: What did you notice today? What evidence did you use?
Try this at home
- Talk about a pattern you both notice outdoors or in the kitchen.
- Ask for one science word from the week and use it in a sentence.
- Draw a simple diagram of something they investigated.
Warm regards,
The Year 6 team
seegongsik.com/au/y6/chemical/AC9S6U04/pack
Sort the changes
Children explore “Sort the changes” with talk, the board picture, and a short paper task. About 60 minutes, or two 30-minute sessions.
We are learning to
- explain the idea behind sort the changes in Year 6 words,
- use the board picture to check our thinking,
- record an example with evidence.
Success criteria
- I can show one clear example of today’s idea.
- I can say the idea in a short science sentence.
You need
- interactive unit open on “Sort the changes” when available,
- worksheet (next sheet), one per child,
- optional cut-out cards or exit tickets (third sheet).
Lesson flow (about 60 minutes)
| 10 min | Hook Quick oral examples linked to the unit story. Ask: “What do you already know that might help today?” |
| 15 min | On the board Open “Sort the changes”. Step the controls while children predict. Ask: “What changed? What stayed the same?” |
| 20 min | Worksheet Children complete the sheet. Circulate for the muddles listed below. |
| 15 min | Share and exit Two children share. Class finishes the exit sentence. Ask: “In one sentence, what was today’s idea?” |
Split point: after On the board. Session B is worksheet and share.
Watch for
- Skipping the board and only copying answers -- bring them back to the picture.
- Correct answer with no explanation -- ask how do you know?
Make it easier, make it bigger
- Easier: complete the first two worksheet items together.
- Bigger: invent one new example for a partner to solve.
Answers and look-fors
- Meeting the idea sounds like a clear sentence about sort the changes.
- Drawings or numbers match the board story.
Sort the changes
Use the board picture. Show your thinking with words or drawings.
Exit tickets
Today I learned...
One piece of evidence was...
Today I learned...
One piece of evidence was...
Today I learned...
One piece of evidence was...
Today I learned...
One piece of evidence was...
Today I learned...
One piece of evidence was...
Today I learned...
One piece of evidence was...
Look-for: a science idea plus something observed or measured.
Dissolving sugar is reversible
Children explore “Dissolving sugar is reversible” with talk, the board picture, and a short paper task. About 60 minutes, or two 30-minute sessions.
We are learning to
- explain the idea behind dissolving sugar is reversible in Year 6 words,
- use the board picture to check our thinking,
- record an example with evidence.
Success criteria
- I can show one clear example of today’s idea.
- I can say the idea in a short science sentence.
You need
- interactive unit open on “Dissolving sugar is reversible” when available,
- worksheet (next sheet), one per child,
- optional cut-out cards or exit tickets (third sheet).
Lesson flow (about 60 minutes)
| 10 min | Hook Quick oral examples linked to the unit story. Ask: “What do you already know that might help today?” |
| 15 min | On the board Open “Dissolving sugar is reversible”. Step the controls while children predict. Ask: “What changed? What stayed the same?” |
| 20 min | Worksheet Children complete the sheet. Circulate for the muddles listed below. |
| 15 min | Share and exit Two children share. Class finishes the exit sentence. Ask: “In one sentence, what was today’s idea?” |
Split point: after On the board. Session B is worksheet and share.
Watch for
- Skipping the board and only copying answers -- bring them back to the picture.
- Correct answer with no explanation -- ask how do you know?
Make it easier, make it bigger
- Easier: complete the first two worksheet items together.
- Bigger: invent one new example for a partner to solve.
Answers and look-fors
- Meeting the idea sounds like a clear sentence about dissolving sugar is reversible.
- Drawings or numbers match the board story.
Dissolving sugar is reversible
Use the board picture. Show your thinking with words or drawings.
Exit tickets
Today I learned...
One piece of evidence was...
Today I learned...
One piece of evidence was...
Today I learned...
One piece of evidence was...
Today I learned...
One piece of evidence was...
Today I learned...
One piece of evidence was...
Today I learned...
One piece of evidence was...
Look-for: a science idea plus something observed or measured.
Changing state is reversible
Children explore “Changing state is reversible” with talk, the board picture, and a short paper task. About 60 minutes, or two 30-minute sessions.
We are learning to
- explain the idea behind changing state is reversible in Year 6 words,
- use the board picture to check our thinking,
- record an example with evidence.
Success criteria
- I can show one clear example of today’s idea.
- I can say the idea in a short science sentence.
You need
- interactive unit open on “Changing state is reversible” when available,
- worksheet (next sheet), one per child,
- optional cut-out cards or exit tickets (third sheet).
Lesson flow (about 60 minutes)
| 10 min | Hook Quick oral examples linked to the unit story. Ask: “What do you already know that might help today?” |
| 15 min | On the board Open “Changing state is reversible”. Step the controls while children predict. Ask: “What changed? What stayed the same?” |
| 20 min | Worksheet Children complete the sheet. Circulate for the muddles listed below. |
| 15 min | Share and exit Two children share. Class finishes the exit sentence. Ask: “In one sentence, what was today’s idea?” |
Split point: after On the board. Session B is worksheet and share.
Watch for
- Skipping the board and only copying answers -- bring them back to the picture.
- Correct answer with no explanation -- ask how do you know?
Make it easier, make it bigger
- Easier: complete the first two worksheet items together.
- Bigger: invent one new example for a partner to solve.
Answers and look-fors
- Meeting the idea sounds like a clear sentence about changing state is reversible.
- Drawings or numbers match the board story.
Changing state is reversible
Use the board picture. Show your thinking with words or drawings.
Exit tickets
Today I learned...
One piece of evidence was...
Today I learned...
One piece of evidence was...
Today I learned...
One piece of evidence was...
Today I learned...
One piece of evidence was...
Today I learned...
One piece of evidence was...
Today I learned...
One piece of evidence was...
Look-for: a science idea plus something observed or measured.
Cooking an egg is irreversible
Children explore “Cooking an egg is irreversible” with talk, the board picture, and a short paper task. About 60 minutes, or two 30-minute sessions.
We are learning to
- explain the idea behind cooking an egg is irreversible in Year 6 words,
- use the board picture to check our thinking,
- record an example with evidence.
Success criteria
- I can show one clear example of today’s idea.
- I can say the idea in a short science sentence.
You need
- interactive unit open on “Cooking an egg is irreversible” when available,
- worksheet (next sheet), one per child,
- optional cut-out cards or exit tickets (third sheet).
Lesson flow (about 60 minutes)
| 10 min | Hook Quick oral examples linked to the unit story. Ask: “What do you already know that might help today?” |
| 15 min | On the board Open “Cooking an egg is irreversible”. Step the controls while children predict. Ask: “What changed? What stayed the same?” |
| 20 min | Worksheet Children complete the sheet. Circulate for the muddles listed below. |
| 15 min | Share and exit Two children share. Class finishes the exit sentence. Ask: “In one sentence, what was today’s idea?” |
Split point: after On the board. Session B is worksheet and share.
Watch for
- Skipping the board and only copying answers -- bring them back to the picture.
- Correct answer with no explanation -- ask how do you know?
Make it easier, make it bigger
- Easier: complete the first two worksheet items together.
- Bigger: invent one new example for a partner to solve.
Answers and look-fors
- Meeting the idea sounds like a clear sentence about cooking an egg is irreversible.
- Drawings or numbers match the board story.
Cooking an egg is irreversible
Use the board picture. Show your thinking with words or drawings.
Exit tickets
Today I learned...
One piece of evidence was...
Today I learned...
One piece of evidence was...
Today I learned...
One piece of evidence was...
Today I learned...
One piece of evidence was...
Today I learned...
One piece of evidence was...
Today I learned...
One piece of evidence was...
Look-for: a science idea plus something observed or measured.
Rusting is irreversible
Children explore “Rusting is irreversible” with talk, the board picture, and a short paper task. About 60 minutes, or two 30-minute sessions.
We are learning to
- explain the idea behind rusting is irreversible in Year 6 words,
- use the board picture to check our thinking,
- record an example with evidence.
Success criteria
- I can show one clear example of today’s idea.
- I can say the idea in a short science sentence.
You need
- interactive unit open on “Rusting is irreversible” when available,
- worksheet (next sheet), one per child,
- optional cut-out cards or exit tickets (third sheet).
Lesson flow (about 60 minutes)
| 10 min | Hook Quick oral examples linked to the unit story. Ask: “What do you already know that might help today?” |
| 15 min | On the board Open “Rusting is irreversible”. Step the controls while children predict. Ask: “What changed? What stayed the same?” |
| 20 min | Worksheet Children complete the sheet. Circulate for the muddles listed below. |
| 15 min | Share and exit Two children share. Class finishes the exit sentence. Ask: “In one sentence, what was today’s idea?” |
Split point: after On the board. Session B is worksheet and share.
Watch for
- Skipping the board and only copying answers -- bring them back to the picture.
- Correct answer with no explanation -- ask how do you know?
Make it easier, make it bigger
- Easier: complete the first two worksheet items together.
- Bigger: invent one new example for a partner to solve.
Answers and look-fors
- Meeting the idea sounds like a clear sentence about rusting is irreversible.
- Drawings or numbers match the board story.
Rusting is irreversible
Use the board picture. Show your thinking with words or drawings.
Exit tickets
Today I learned...
One piece of evidence was...
Today I learned...
One piece of evidence was...
Today I learned...
One piece of evidence was...
Today I learned...
One piece of evidence was...
Today I learned...
One piece of evidence was...
Today I learned...
One piece of evidence was...
Look-for: a science idea plus something observed or measured.
Deeper look: Sort the changes
Children explore “Deeper look: Sort the changes” with talk, the board picture, and a short paper task. About 60 minutes, or two 30-minute sessions.
We are learning to
- explain the idea behind sort the changes in Year 6 words,
- use the board picture to check our thinking,
- record an example with evidence.
Success criteria
- I can show one clear example of today’s idea.
- I can say the idea in a short science sentence.
You need
- interactive unit open on “Deeper look: Sort the changes” when available,
- worksheet (next sheet), one per child,
- optional cut-out cards or exit tickets (third sheet).
Lesson flow (about 60 minutes)
| 10 min | Hook Quick oral examples linked to the unit story. Ask: “What do you already know that might help today?” |
| 15 min | On the board Open “Deeper look: Sort the changes”. Step the controls while children predict. Ask: “What changed? What stayed the same?” |
| 20 min | Worksheet Children complete the sheet. Circulate for the muddles listed below. |
| 15 min | Share and exit Two children share. Class finishes the exit sentence. Ask: “In one sentence, what was today’s idea?” |
Split point: after On the board. Session B is worksheet and share.
Watch for
- Skipping the board and only copying answers -- bring them back to the picture.
- Correct answer with no explanation -- ask how do you know?
Make it easier, make it bigger
- Easier: complete the first two worksheet items together.
- Bigger: invent one new example for a partner to solve.
Answers and look-fors
- Meeting the idea sounds like a clear sentence about sort the changes.
- Drawings or numbers match the board story.
Deeper look: Sort the changes
Use the board picture. Show your thinking with words or drawings.
Exit tickets
Today I learned...
One piece of evidence was...
Today I learned...
One piece of evidence was...
Today I learned...
One piece of evidence was...
Today I learned...
One piece of evidence was...
Today I learned...
One piece of evidence was...
Today I learned...
One piece of evidence was...
Look-for: a science idea plus something observed or measured.
Deeper look: Dissolving sugar is reversible
Children explore “Deeper look: Dissolving sugar is reversible” with talk, the board picture, and a short paper task. About 60 minutes, or two 30-minute sessions.
We are learning to
- explain the idea behind dissolving sugar is reversible in Year 6 words,
- use the board picture to check our thinking,
- record an example with evidence.
Success criteria
- I can show one clear example of today’s idea.
- I can say the idea in a short science sentence.
You need
- interactive unit open on “Deeper look: Dissolving sugar is reversible” when available,
- worksheet (next sheet), one per child,
- optional cut-out cards or exit tickets (third sheet).
Lesson flow (about 60 minutes)
| 10 min | Hook Quick oral examples linked to the unit story. Ask: “What do you already know that might help today?” |
| 15 min | On the board Open “Deeper look: Dissolving sugar is reversible”. Step the controls while children predict. Ask: “What changed? What stayed the same?” |
| 20 min | Worksheet Children complete the sheet. Circulate for the muddles listed below. |
| 15 min | Share and exit Two children share. Class finishes the exit sentence. Ask: “In one sentence, what was today’s idea?” |
Split point: after On the board. Session B is worksheet and share.
Watch for
- Skipping the board and only copying answers -- bring them back to the picture.
- Correct answer with no explanation -- ask how do you know?
Make it easier, make it bigger
- Easier: complete the first two worksheet items together.
- Bigger: invent one new example for a partner to solve.
Answers and look-fors
- Meeting the idea sounds like a clear sentence about dissolving sugar is reversible.
- Drawings or numbers match the board story.
Deeper look: Dissolving sugar is reversible
Use the board picture. Show your thinking with words or drawings.
Exit tickets
Today I learned...
One piece of evidence was...
Today I learned...
One piece of evidence was...
Today I learned...
One piece of evidence was...
Today I learned...
One piece of evidence was...
Today I learned...
One piece of evidence was...
Today I learned...
One piece of evidence was...
Look-for: a science idea plus something observed or measured.
Deeper look: Changing state is reversible
Children explore “Deeper look: Changing state is reversible” with talk, the board picture, and a short paper task. About 60 minutes, or two 30-minute sessions.
We are learning to
- explain the idea behind changing state is reversible in Year 6 words,
- use the board picture to check our thinking,
- record an example with evidence.
Success criteria
- I can show one clear example of today’s idea.
- I can say the idea in a short science sentence.
You need
- interactive unit open on “Deeper look: Changing state is reversible” when available,
- worksheet (next sheet), one per child,
- optional cut-out cards or exit tickets (third sheet).
Lesson flow (about 60 minutes)
| 10 min | Hook Quick oral examples linked to the unit story. Ask: “What do you already know that might help today?” |
| 15 min | On the board Open “Deeper look: Changing state is reversible”. Step the controls while children predict. Ask: “What changed? What stayed the same?” |
| 20 min | Worksheet Children complete the sheet. Circulate for the muddles listed below. |
| 15 min | Share and exit Two children share. Class finishes the exit sentence. Ask: “In one sentence, what was today’s idea?” |
Split point: after On the board. Session B is worksheet and share.
Watch for
- Skipping the board and only copying answers -- bring them back to the picture.
- Correct answer with no explanation -- ask how do you know?
Make it easier, make it bigger
- Easier: complete the first two worksheet items together.
- Bigger: invent one new example for a partner to solve.
Answers and look-fors
- Meeting the idea sounds like a clear sentence about changing state is reversible.
- Drawings or numbers match the board story.
Deeper look: Changing state is reversible
Use the board picture. Show your thinking with words or drawings.
Exit tickets
Today I learned...
One piece of evidence was...
Today I learned...
One piece of evidence was...
Today I learned...
One piece of evidence was...
Today I learned...
One piece of evidence was...
Today I learned...
One piece of evidence was...
Today I learned...
One piece of evidence was...
Look-for: a science idea plus something observed or measured.
Deeper look: Cooking an egg is irreversible
Children explore “Deeper look: Cooking an egg is irreversible” with talk, the board picture, and a short paper task. About 60 minutes, or two 30-minute sessions.
We are learning to
- explain the idea behind cooking an egg is irreversible in Year 6 words,
- use the board picture to check our thinking,
- record an example with evidence.
Success criteria
- I can show one clear example of today’s idea.
- I can say the idea in a short science sentence.
You need
- interactive unit open on “Deeper look: Cooking an egg is irreversible” when available,
- worksheet (next sheet), one per child,
- optional cut-out cards or exit tickets (third sheet).
Lesson flow (about 60 minutes)
| 10 min | Hook Quick oral examples linked to the unit story. Ask: “What do you already know that might help today?” |
| 15 min | On the board Open “Deeper look: Cooking an egg is irreversible”. Step the controls while children predict. Ask: “What changed? What stayed the same?” |
| 20 min | Worksheet Children complete the sheet. Circulate for the muddles listed below. |
| 15 min | Share and exit Two children share. Class finishes the exit sentence. Ask: “In one sentence, what was today’s idea?” |
Split point: after On the board. Session B is worksheet and share.
Watch for
- Skipping the board and only copying answers -- bring them back to the picture.
- Correct answer with no explanation -- ask how do you know?
Make it easier, make it bigger
- Easier: complete the first two worksheet items together.
- Bigger: invent one new example for a partner to solve.
Answers and look-fors
- Meeting the idea sounds like a clear sentence about cooking an egg is irreversible.
- Drawings or numbers match the board story.
Deeper look: Cooking an egg is irreversible
Use the board picture. Show your thinking with words or drawings.
Exit tickets
Today I learned...
One piece of evidence was...
Today I learned...
One piece of evidence was...
Today I learned...
One piece of evidence was...
Today I learned...
One piece of evidence was...
Today I learned...
One piece of evidence was...
Today I learned...
One piece of evidence was...
Look-for: a science idea plus something observed or measured.
Show what we know
Children explore “Show what we know” with talk, the board picture, and a short paper task. About 60 minutes, or two 30-minute sessions.
We are learning to
- explain the idea behind show what we know in Year 6 words,
- use the board picture to check our thinking,
- record an example with evidence.
Success criteria
- I can show one clear example of today’s idea.
- I can say the idea in a short science sentence.
You need
- interactive unit open on “Show what we know” when available,
- worksheet (next sheet), one per child,
- optional cut-out cards or exit tickets (third sheet).
Lesson flow (about 60 minutes)
| 10 min | Hook Quick oral examples linked to the unit story. Ask: “What do you already know that might help today?” |
| 15 min | On the board Open “Show what we know”. Step the controls while children predict. Ask: “What changed? What stayed the same?” |
| 20 min | Worksheet Children complete the sheet. Circulate for the muddles listed below. |
| 15 min | Share and exit Two children share. Class finishes the exit sentence. Ask: “In one sentence, what was today’s idea?” |
Split point: after On the board. Session B is worksheet and share.
Watch for
- Skipping the board and only copying answers -- bring them back to the picture.
- Correct answer with no explanation -- ask how do you know?
Make it easier, make it bigger
- Easier: complete the first two worksheet items together.
- Bigger: invent one new example for a partner to solve.
Answers and look-fors
- Meeting the idea sounds like a clear sentence about show what we know.
- Drawings or numbers match the board story.
Show what we know
Use the board picture. Show your thinking with words or drawings.
Exit tickets
Today I learned...
One piece of evidence was...
Today I learned...
One piece of evidence was...
Today I learned...
One piece of evidence was...
Today I learned...
One piece of evidence was...
Today I learned...
One piece of evidence was...
Today I learned...
One piece of evidence was...
Look-for: a science idea plus something observed or measured.