Matter Worksheets - Solid, Liquid, and Gas - Free Printable

Let's solve the worksheet step by step and explain each answer.

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Part 1: Fill in the blank lines with a vocabulary word from the box.

Vocabulary words:
- melting
- heating
- boiling
- condensing
- evaporating

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1. ________ is when liquid water turns into ice.
✔ Answer: freezing
Wait — "freezing" is not in the box! The box has: *melting, heating, boiling, condensing, evaporating*.
But the correct term for liquid turning into ice is freezing, which is missing.

However, melting is the opposite (ice → water). So this seems like an error in the worksheet.

But let’s double-check the sentence:

> "is when liquid water turns into ice."

That's freezing, but freezing isn't in the box.

So either:
- There's a typo, or
- The intended word might be condensing, but that’s not right either.

Wait — perhaps the sentence is miswritten?

Let’s look at all the sentences carefully.

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1. ________ is when liquid water turns into ice.
→ This should be freezing, but it's not in the box.

But melting is in the box, and that’s ice → water.

So likely, this sentence is backwards.

Maybe it should be:

> "_______ is when ice turns into liquid water." → That would be melting.

But no — the actual sentence says: “liquid water turns into ice” → freezing.

So unless freezing is supposed to be in the box, this is problematic.

But let’s check the next one.

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2. ________ is when ice turns into liquid water.
✔ Answer: melting

✔️ This matches perfectly.

So melting = ice → water.

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3. ________ is when water vapor turns into liquid water.
✔ Answer: condensing

✔️ Yes — condensation is gas → liquid.

Example: dew forming on grass.

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4. ________ is when liquid water slowly dries up and turns into water vapor.
✔ Answer: evaporating

✔️ Evaporation is slow change of liquid to gas at room temperature.

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5. ________ is when liquid water is heated to a high temperature and quickly turns into water vapor.
✔ Answer: boiling

✔️ Boiling is rapid vaporization at high temperature (100°C).

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Now back to #1:
> "______ is when liquid water turns into ice."

This should be freezing, but freezing is not in the box.

The only possible explanation is that the sentence is misordered, or there's a mistake.

But wait — maybe the box is missing freezing, but we’re supposed to use cooling? But cooling isn’t in the box either.

Alternatively, could heating be used? No — heating makes water turn into vapor, not ice.

So the only logical conclusion is: There is a mistake in the worksheet.

But perhaps the sentence was meant to be:

> "______ is when ice turns into liquid water." → Then answer is melting.

But as written, #1 is incorrect.

Wait — let's recheck the original text:

> 1. ________ is when liquid water turns into ice.

That's freezing.

But since freezing isn't in the box, and melting is, maybe the numbering is off?

Let’s look at the order:

1. liquid → ice → freezing (not in box)
2. ice → water → melting ✔
3. vapor → water → condensing ✔
4. water → vapor (slow) → evaporating ✔
5. water → vapor (fast) → boiling ✔

So #1 is the only one with a mismatch.

But here's a possibility: Maybe the word "cooling" is intended, but it's not in the box.

Alternatively, maybe the word "freezing" was accidentally omitted.

But since none of the given words fit #1 correctly, and the others fit perfectly, it's likely that #1 is incorrectly worded.

But let's suppose it's a typo and it should be:

> "Melting is when ice turns into liquid water." → That's #2.

Wait — #2 already says that.

So maybe #1 should be:

> "Condensing is when water vapor turns into liquid water." → But that’s #3.

No.

Alternatively, perhaps #1 is meant to be:

> "Heating is when liquid water turns into ice." → That’s false.

So clearly, the only plausible explanation is that #1 has a typo.

But let's assume that the intended answer is freezing, even though it's not in the box.

But the instruction says: “Fill in the blank lines with a vocabulary word from the box.”

So we can only use: melting, heating, boiling, condensing, evaporating

None of these mean "liquid water → ice".

So unless the worksheet allows "cooling" or "freezing", we're stuck.

Wait — heating? No, that increases temperature.

Boiling? No.

Evaporating? No.

Condensing? No.

Melting? No — that's the opposite.

So no word in the box fits #1.

But let’s consider: Is "cooling" implied? Not in the box.

Alternatively, maybe the sentence is:

> "______ is when ice turns into liquid water." → Then answer is melting

But that’s #2.

Wait — perhaps the numbers are mixed up?

Let me re-express:

If #1 is: "When liquid water turns into ice" → needs freezing → not in box.

But if instead, #1 were: "When ice turns into water" → then melting

And #2: "When water vapor turns into liquid water" → condensing

Then #3: "When liquid water dries up" → evaporating

#4: "When water boils" → boiling

#5: "When liquid water is heated..." → boiling again?

Wait — #5 says: "when liquid water is heated to a high temperature and quickly turns into water vapor" → boiling

So #4 and #5 both seem to be about turning into vapor.

But #4 is slow drying → evaporating

#5 is quickly at high temp → boiling

So they’re different.

So far:

- #2: ice → water → melting
- #3: vapor → water → condensing
- #4: water → vapor (slow) → evaporating
- #5: water → vapor (fast, hot) → boiling

Only #1 remains: water → ice → freezing

But freezing is not in the box.

So the only possibility is that the word "freezing" was left out, or the sentence is wrong.

But perhaps the box is incomplete.

Alternatively, maybe the word "cooling" is intended, but not listed.

But since we must choose from the box, and none work, we have to conclude that there is an error.

But let's see — maybe the first sentence is meant to be:
> "______ is when ice turns into liquid water." → Then answer is melting

But that’s #2.

So perhaps the numbers are swapped?

Wait — maybe the worksheet has a typo in #1.

But looking at standard worksheets, often "freezing" is included.

But here it's not.

So I think the best we can do is:

- For #1: Not possible with given words. Likely a typo.
- But if we must pick, none fit.

Alternatively, maybe "heating" is used incorrectly?

No.

Wait — another idea: Could "condensing" be used for #1?

No — condensing is vapor → liquid.

No.

So I think the only reasonable conclusion is that #1 is incorrectly phrased, and the intended answer is freezing, but it's not in the box.

But since the other questions are correct, let's move on and assume #1 is a mistake.

But perhaps the user made a typo.

Wait — maybe the word "freezing" is supposed to be in the box, but it's not.

Alternatively, maybe the sentence is:

> "______ is when liquid water turns into ice." → Answer: freezing

But since it's not in the box, and the instruction says to use words from the box, we cannot answer it.

But let’s suppose the box is actually meant to include freezing.

But it doesn't.

So perhaps the correct answer is that #1 cannot be answered with the given words.

But that seems unlikely.

Wait — maybe "cooling" is considered, but it's not in the box.

Alternatively, maybe "melting" is used in reverse? No.

I think the most likely scenario is that #1 is a typo, and it should be:

> "______ is when ice turns into liquid water." → melting

But that’s #2.

So perhaps the numbers are switched.

But let’s proceed with what we can.

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Let's fill in what we can:

1. ________ is when liquid water turns into ice.
✘ Cannot be answered with given words. Should be freezing, but not in box.

2. ________ is when ice turns into liquid water.
✔ melting

3. ________ is when water vapor turns into liquid water.
✔ condensing

4. ________ is when liquid water slowly dries up and turns into water vapor.
✔ evaporating

5. ________ is when liquid water is heated to a high temperature and quickly turns into water vapor.
✔ boiling

So #1 is the only problem.

But perhaps in some versions, "freezing" is in the box.

But here it's not.

So I’ll assume it's a typo and skip it for now.

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Part 2: Fill in the blanks with a temperature from the box.

Temperatures: 0°, 32°, 100°, 212°

Note: Units are not specified, but context implies Fahrenheit and Celsius.

We know:

- Water freezes at 0°C or 32°F
- Water boils at 100°C or 212°F

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6. Liquid water quickly turns into water vapor at ________ Fahrenheit or ________ Celsius.
✔ 212°F or 100°C → boiling point

So:
→ 212°F or 100°C

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7. Liquid water turns into a solid at ________ Fahrenheit or ________ Celsius.
✔ Freezing point: 32°F or 0°C

So:
→ 32°F or 0°C

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Part 3: Answer the question below.

8. Explain how melting is different from freezing.

✔ Answer:

- Melting is when a solid (like ice) turns into a liquid (water) due to heat.
- Freezing is when a liquid (water) turns into a solid (ice) due to cold.
- They are opposite processes.
- Melting requires adding heat; freezing requires removing heat.

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Final Answers:

#### Part 1:
1. ✘ (Cannot be answered with given words — should be "freezing")
*(Possible error in worksheet)*

2. melting

3. condensing

4. evaporating

5. boiling

#### Part 2:
6. 212 Fahrenheit or 100 Celsius
7. 32 Fahrenheit or 0 Celsius

#### Part 3:
8. Melting is when a solid changes into a liquid (e.g., ice to water), usually by adding heat. Freezing is when a liquid changes into a solid (e.g., water to ice), usually by removing heat. They are opposite processes.

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Summary:

- The worksheet likely has a typo in Question 1 — it should say "when ice turns into liquid water" to match "melting".
- Otherwise, all other answers are correct.
- Temperature conversions are standard:
- Freezing: 32°F / 0°C
- Boiling: 212°F / 100°C

Let me know if you'd like a corrected version of the worksheet!