This worksheet helps students identify physical versus chemical changes by coloring examples like burning wood or melting ice.

Let’s go step by step to figure out which examples are physical changes (color red) and which are chemical changes (color blue).

First, remember:
- A physical change means the substance looks different but is still the same stuff. No new thing is made. You can often reverse it.
- A chemical change means a new substance is formed. It usually can’t be reversed easily. Things like burning, rusting, or rotting are chemical changes.

Now let’s look at each box in the chart one by one:

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Row 1:

1. “no new substance is formed” → This describes a physical change → Color RED
2. Scissors cutting paper → Just changing shape, no new substance → Physical → RED
3. Toaster making toast? Wait — actually, this shows steam coming from a toaster… maybe heating bread? But if it’s just warming up, it might be physical. However, if it’s browning bread, that’s chemical. Looking closely — it’s a toaster with steam, likely meaning heat causing evaporation or warming — probably physical → RED *(Note: If it were burning bread, it’d be chemical — but here it seems like simple heating)*
4. Glass of water with bubbles and ice cubes melting → Ice melting is physical (same water, just state change) → Physical → RED
5. Pouring bleach on fabric → Bleach causes a chemical reaction (breaks down color molecules) → Chemical → BLUE

Wait — let’s double-check #5: Bleach reacting with fabric = chemical change → YES → BLUE

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Row 2:

6. Hands bending a ruler → Bending doesn’t make new substance → Physical → RED
7. Glass with ice cubes and droplets → Melting and condensation → both physical → Physical → RED
8. “only a shape change” → That’s definition of physical → RED
9. Magnifying glass looking at two circles → Probably observing something without changing it → Observation isn’t a change! Hmm… maybe it’s meant to show seeing details — not a change at all? But since we have to pick, and no new substance is formed → Physical → RED
10. Matchstick lit on fire → Burning = chemical change → BLUE

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Row 3:

11. Mixing ingredients in bowl → If you’re just stirring flour and sugar, it’s physical. But if it’s baking batter that will rise later… wait, the image shows mixing — probably just combining → Physical → RED
*(Unless it says “baking”, but it doesn’t — so assume mixing only → physical)*
12. Campfire burning logs → Fire = chemical change → BLUE
13. Slicing bread → Cutting = physical → RED
14. “can be reversed” → Physical changes can often be reversed → RED
15. Broken plate → Shattering is physical (still glass, just pieces) → RED

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Row 4:

16. “a solid is formed” → Could be freezing (physical) or precipitate in reaction (chemical). Need context. Look at images around it.
But next to it:
17. Kettle boiling → Water turning to steam → physical → RED
18. Ice cube melting → physical → RED
19. Car crash → crumpled metal → physical deformation → RED
20. “can’t be reversed” → Often true for chemical changes → BLUE

So back to #16: “a solid is formed” — if it’s from cooling liquid (like freezing), it’s physical. If it’s from a reaction (like milk curdling), it’s chemical. Since there’s no specific example given, and it’s paired with other physical things nearby… but wait — look at row 5: “a new substance is formed” is listed separately. So “a solid is formed” alone doesn’t mean new substance — could be phase change → Physical → RED

Actually — hold on. In science, when they say “a solid is formed” in context of reactions, it often means precipitate = chemical. But here, since it’s in a grid with general statements, and next to kettle (boiling) and melting ice — likely referring to freezing → physical → RED

BUT — let’s check standard curriculum: Usually, “formation of a solid” as a sign of chemical change refers to precipitate. However, in this worksheet, since “a new substance is formed” is its own category later, I think “a solid is formed” here is meant to be physical (like freezing). Let’s go with RED.

Wait — better approach: Let’s use the clues given in the text boxes.

The worksheet has these key phrases:

- “no new substance is formed” → physical
- “only a shape change” → physical
- “can be reversed” → physical
- “a solid is formed” → ambiguous, but if it’s from temperature change, physical; if from reaction, chemical. Given context, likely physical → RED
- “a new substance is formed” → chemical → BLUE
- “can’t be reversed” → often chemical → BLUE

Also, note: The instruction says “Color the examples of physical changes in red and chemical in blue.” So every box should be colored either red or blue.

Let me list all 25 boxes with decisions:

I’ll number them left to right, top to bottom:

1. "no new substance is formed" → physical → RED
2. scissors cutting paper → physical → RED
3. toaster with steam → assuming heating, not burning → physical → RED
4. glass with ice and bubbles → melting/evaporation → physical → RED
5. pouring bleach → chemical → BLUE

6. hands bending ruler → physical → RED
7. glass with ice and condensation → physical → RED
8. "only a shape change" → physical → RED
9. magnifying glass → observation, no change → treat as physical → RED
10. lit match → chemical → BLUE

11. mixing in bowl → physical (just combining) → RED
12. campfire → chemical → BLUE
13. slicing bread → physical → RED
14. "can be reversed" → physical → RED
15. broken plate → physical → RED

16. "a solid is formed" → let's reconsider: In many elementary worksheets, "solid formed" without specification might refer to freezing → physical → RED
*(But some might argue precipitate = chemical — however, since "new substance" is separate, I'll stick with physical)*
17. kettle boiling → physical → RED
18. ice melting → physical → RED
19. car crash → physical → RED
20. "can't be reversed" → chemical → BLUE

21. spoon adding powder to water → dissolving → physical (unless it reacts, but usually dissolving salt/sugar is physical) → RED
22. "a new substance is formed" → chemical → BLUE
23. banana peeling → physical (just removing peel) → RED
24. fireworks exploding → chemical → BLUE
25. flask with bubbling and balloon inflating → gas produced = chemical change → BLUE

Wait — #25: Flask with bubbles and balloon — that’s typically a chemical reaction producing gas (like vinegar + baking soda) → chemical → BLUE

And #21: Adding powder to water — if it’s dissolving, physical. If it’s fizzing, chemical. Image shows spoon over glass, no bubbles shown — so likely dissolving → physical → RED

Now, let’s verify tricky ones:

- #3: Toaster — if it’s making toast (browning), that’s Maillard reaction = chemical. But the drawing shows steam, not browned bread. Steam suggests water evaporating — physical. I think it’s safe to call it physical → RED

- #9: Magnifying glass — observing isn’t a change, but since we must assign, and no new substance, → physical → RED

- #16: “a solid is formed” — after rethinking: In the context of this worksheet, since “a new substance is formed” is explicitly listed later, “a solid is formed” probably refers to freezing or crystallization — physical → RED

- #20: “can’t be reversed” — while some physical changes are hard to reverse (like breaking glass), in elementary science, “can’t be reversed” is often associated with chemical changes. Also, it’s placed near chemical examples. So BLUE is correct.

Final decision for each:

RED (Physical): 1,2,3,4,6,7,8,9,11,13,14,15,16,17,18,19,21,23
BLUE (Chemical): 5,10,12,20,22,24,25

Count:
Red: 18 items
Blue: 7 items

List of BLUE (chemical changes):

- Pouring bleach (5)
- Lit match (10)
- Campfire (12)
- Can’t be reversed (20)
- New substance formed (22)
- Fireworks (24)
- Flask with gas/balloon (25)

That makes sense.

Now, for the answer — since the task is to color them, and we can’t color here, we’ll list which ones are red and which are blue.

But the user wants the final answer — probably expecting which boxes are which.

Since it’s a grid, perhaps list by position.

Alternatively, since the instruction is to solve the problem, and the problem is to identify physical vs chemical, we can state:

All boxes described as involving no new substance, shape change, reversible, or state change (melting, boiling, cutting, bending, breaking, dissolving) are physical changes → color RED.

Boxes involving burning, bleaching, forming new substances, irreversible processes (in chemical sense), gas production from reaction, explosions are chemical → color BLUE.

Specifically:

Color RED (Physical Changes):
- Box with "no new substance is formed"
- Scissors cutting paper
- Toaster with steam
- Glass with ice and bubbles
- Hands bending ruler
- Glass with ice and condensation
- "only a shape change"
- Magnifying glass
- Mixing in bowl
- Slicing bread
- "can be reversed"
- Broken plate
- "a solid is formed" (assuming freezing)
- Kettle boiling
- Ice melting
- Car crash
- Spoon adding powder to water
- Banana peeling

Color BLUE (Chemical Changes):
- Pouring bleach
- Lit match
- Campfire
- "can't be reversed"
- "a new substance is formed"
- Fireworks
- Flask with bubbling and balloon

This covers all 25 boxes.

Final Answer:
Color the following boxes RED (physical changes):
1, 2, 3, 4, 6, 7, 8, 9, 11, 13, 14, 15, 16, 17, 18, 19, 21, 23

Color the following boxes BLUE (chemical changes):
5, 10, 12, 20, 22, 24, 25