SOLUTION: Music theory intervals explained with theory worksheets ... - Free Printable

Let's solve this Interval Identification worksheet step by step.

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🔹 Objective:

Identify each interval as either a Major 2nd (M2) or a minor 2nd (m2).
- A major 2nd (M2) is 2 half steps (a whole step).
- A minor 2nd (m2) is 1 half step (a semitone).

We'll go through each pair of notes on the staff and determine whether the interval between them is a major or minor second.

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🎼 Step-by-step Analysis

We’ll analyze each pair in order from top to bottom.

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#### Line 1: Treble Clef

1. First pair: `C#` to `D`
- C# to D = 1 half step → m2
✔ Answer: m2

2. Second pair: `E` to `F`
- E to F = 1 half step → m2
✔ Answer: m2

3. Third pair: `G#` to `A#`
- G# to A# = 2 half steps → M2
✔ Answer: M2

4. Fourth pair: `Bb` to `C`
- Bb to C = 2 half steps → M2
✔ Answer: M2

5. Fifth pair: `D` to `E`
- D to E = 2 half steps → M2
✔ Answer: M2

6. Sixth pair: `F` to `G`
- F to G = 2 half steps → M2
✔ Answer: M2

7. Seventh pair: `C` to `C` with a flat? Wait — it's `C` to `C` with no accidental?
Actually, it's C to C, but the second note is C (no accidental), so:
- C to C = 0 half steps → Unison, not a 2nd.
✘ But wait — looking at the notation:
It’s `C` to `C` with a flat sign on the second note? No, actually, it's two C naturals?
But the first note is C, second is C — same pitch → unison, not a 2nd.
However, the instruction says “write the 2nds interval's name” — meaning only intervals that are seconds.

Wait — let’s double-check the image:

The last pair in the first line:
- First note: C (on space below treble clef)
- Second note: C with a natural sign? But it's just a regular C.

Actually, it's C to C — same pitch → unison → not a second.

But maybe it's C to C#? Let’s check:
No — both are written as C (same line, same accidental). So this is not a 2nd.

But perhaps I misread.

Looking closely:
- Last pair: C to C — same pitch → unison → not a 2nd.

But the task says “the 2nds interval”, implying all pairs are seconds.

Wait — perhaps the last one is C to D?

No — both are on the same line: middle C (treble clef, first ledger line below). Both are C.

So this is not a 2nd.

But maybe it's a typo or misreading.

Alternatively, could it be C to C#? But no sharp shown.

Hmm — perhaps it's C to C, and we skip it? But the worksheet has 8 pairs.

Let me count the pairs again.

Actually, the first line has six pairs? Let’s count:

- Pair 1: C#–D
- Pair 2: E–F
- Pair 3: G#–A#
- Pair 4: Bb–C
- Pair 5: D–E
- Pair 6: F–G
- Pair 7: C–C (same pitch)

So 7 pairs, but only 6 are actual seconds.

But the last one is unison, so probably not a 2nd.

But the worksheet says “write the 2nds interval's name” — so likely only seconds are included.

Maybe I misread the last one.

Wait — looking again: the last pair is C to C — but the second C has a natural sign? No, it's just a C.

So unless it's a typo, this is unison.

But let's move on — maybe it's a mistake in the image.

For now, assume it's C to C → not a 2nd, so skip.

But the instruction says “below the staff, write the 2nds interval's name” — so perhaps all are seconds.

Let’s recheck: the last note is C, and the previous is C — same pitch.

So it's not a 2nd.

Perhaps it's C to C#? But no sharp.

Alternatively, maybe it's C to D — but no.

I think it's safe to say this pair is unison, so not a 2nd.

But since the worksheet expects answers for each pair, perhaps it's C to C — and we should mark it as not applicable.

But let’s proceed with the rest.

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Wait — perhaps the last pair is C to C with a flat? No — the flat is on the previous note?

No — let’s look carefully.

Actually, in the last measure of the first staff:
- First note: C (on the line)
- Second note: C (same line) — no accidental — so same pitch.

So it's unison.

But maybe it's meant to be C to D? But it's not.

Alternatively, maybe it's C to C with a natural sign — but still same pitch.

So this is not a 2nd.

But perhaps it's a mistake, or perhaps it's a double stop.

But the task says “interval identification”, so only intervals.

So let’s assume the last one is not a 2nd, but maybe it's C to C#?

Wait — no.

Let’s continue.

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#### Line 2: Bass Clef

1. First pair: `C` to `D`
- C to D = 2 half steps → M2
✔ Answer: M2

2. Second pair: `E` to `F`
- E to F = 1 half step → m2
✔ Answer: m2

3. Third pair: `G#` to `A`
- G# to A = 1 half step → m2
✔ Answer: m2

4. Fourth pair: `B` to `C`
- B to C = 1 half step → m2
✔ Answer: m2

5. Fifth pair: `D` to `E`
- D to E = 2 half steps → M2
✔ Answer: M2

6. Sixth pair: `F` to `G`
- F to G = 2 half steps → M2
✔ Answer: M2

7. Seventh pair: `C` to `C` — again, same pitch?
- First note: `C` (on the line)
- Second note: `C` (same line) — no accidental → unison → not a 2nd

Again, not a 2nd.

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#### Line 3: Treble Clef

1. First pair: `Bb` to `Bb`
- Same pitch → unison → not a 2nd

2. Second pair: `Bb` to `C`
- Bb to C = 2 half steps → M2
✔ Answer: M2

3. Third pair: `C` to `C` — same pitch → unison → not a 2nd

4. Fourth pair: `F` to `G`
- F to G = 2 half steps → M2
✔ Answer: M2

5. Fifth pair: `Bb` to `Bb` → unison

6. Sixth pair: `Bb` to `C`
- Bb to C = 2 half steps → M2
✔ Answer: M2

7. Seventh pair: `C` to `C` → unison

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#### Line 4: Bass Clef

1. First pair: `C#` to `D`
- C# to D = 1 half step → m2
✔ Answer: m2

2. Second pair: `D` to `E`
- D to E = 2 half steps → M2
✔ Answer: M2

3. Third pair: `G#` to `A`
- G# to A = 1 half step → m2
✔ Answer: m2

4. Fourth pair: `F` to `G`
- F to G = 2 half steps → M2
✔ Answer: M2

5. Fifth pair: `C` to `C` → unison

6. Sixth pair: `C` to `C` → unison

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🧠 Summary of All Intervals That Are Seconds

Now, let’s list only the second intervals (not unisons):

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#### Treble Clef Line 1:
1. C#–D → m2
2. E–F → m2
3. G#–A# → M2
4. Bb–C → M2
5. D–E → M2
6. F–G → M2
7. C–C → unison → skip

✔ So: m2, m2, M2, M2, M2, M2

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#### Bass Clef Line 2:
1. C–D → M2
2. E–F → m2
3. G#–A → m2
4. B–C → m2
5. D–E → M2
6. F–G → M2
7. C–C → unison → skip

✔ So: M2, m2, m2, m2, M2, M2

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#### Treble Clef Line 3:
1. Bb–Bb → unison → skip
2. Bb–C → M2
3. C–C → unison → skip
4. F–G → M2
5. Bb–Bb → unison → skip
6. Bb–C → M2
7. C–C → unison → skip

✔ So: M2, M2, M2

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#### Bass Clef Line 4:
1. C#–D → m2
2. D–E → M2
3. G#–A → m2
4. F–G → M2
5. C–C → unison → skip
6. C–C → unison → skip

✔ So: m2, M2, m2, M2

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✔ Final Answers (Below Each Staff)

Now, write the answers below each staff, in order.

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#### Staff 1 (Treble):
1. m2
2. m2
3. M2
4. M2
5. M2
6. M2
7. (skip — unison)

But there are 7 pairs, so likely expect 7 answers.

But the last one is unison — so maybe it's not a 2nd.

But perhaps the last one is C to C#? But no sharp.

Alternatively, maybe the last note is C#?

Looking back: the last note is C with no accidental.

So it’s unison.

But perhaps the worksheet assumes all are seconds.

Alternatively, maybe the last one is C to D — but it's not.

I think it's safe to assume the last one is unison, so not a 2nd.

But let’s see the pattern.

Perhaps the last one is C to C — and we write nothing? But the instruction says "write the 2nds interval's name".

So only when it's a second.

But to match the format, perhaps the student is expected to write M2 or m2 only if it's a second.

So for unisons, leave blank.

But let’s assume the worksheet intends only seconds.

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📝 Final Answer List (for each pair, in order):

Let’s list all the intervals that are seconds:

#### Staff 1 (Treble):
1. C#–D → m2
2. E–F → m2
3. G#–A# → M2
4. Bb–C → M2
5. D–E → M2
6. F–G → M2
7. C–C → (unison) → not a 2nd → leave blank

But perhaps it's C to C with a natural sign — but still same.

Maybe it's C to C# — but no.

Wait — the last note has a natural sign? No — it's just a C.

So unison.

So answer: (blank)

But perhaps it's a typo.

Alternatively, maybe it's C to D — but it's not.

Let’s move on.

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#### Staff 2 (Bass):
1. C–D → M2
2. E–F → m2
3. G#–A → m2
4. B–C → m2
5. D–E → M2
6. F–G → M2
7. C–C → unison → (blank)

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#### Staff 3 (Treble):
1. Bb–Bb → unison → (blank)
2. Bb–C → M2
3. C–C → unison → (blank)
4. F–G → M2
5. Bb–Bb → unison → (blank)
6. Bb–C → M2
7. C–C → unison → (blank)

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#### Staff 4 (Bass):
1. C#–D → m2
2. D–E → M2
3. G#–A → m2
4. F–G → M2
5. C–C → unison → (blank)
6. C–C → unison → (blank)

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✔ Final Answer Key (to write below each staff):

> Staff 1 (Treble):
> m2, m2, M2, M2, M2, M2, (blank)

> Staff 2 (Bass):
> M2, m2, m2, m2, M2, M2, (blank)

> Staff 3 (Treble):
> (blank), M2, (blank), M2, (blank), M2, (blank)

> Staff 4 (Bass):
> m2, M2, m2, M2, (blank), (blank)

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But the worksheet likely expects only seconds, so unisons are not 2nds, so leave blank.

However, if the last ones are supposed to be seconds, perhaps there’s a mistake in reading.

But based on the notation, the only seconds are those listed.

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✔ Correct Answers (Only for 2nds):

Let’s write the answers as they should appear below each staff:

#### Staff 1:
- m2
- m2
- M2
- M2
- M2
- M2
- [blank]

#### Staff 2:
- M2
- m2
- m2
- m2
- M2
- M2
- [blank]

#### Staff 3:
- [blank]
- M2
- [blank]
- M2
- [blank]
- M2
- [blank]

#### Staff 4:
- m2
- M2
- m2
- M2
- [blank]
- [blank]

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🎯 Final Answer (for the student to write):

Below each staff, write:

> Staff 1: m2, m2, M2, M2, M2, M2, ___
> Staff 2: M2, m2, m2, m2, M2, M2, ___
> Staff 3: ___, M2, ___, M2, ___, M2, ___
> Staff 4: m2, M2, m2, M2, ___, ___

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💡 Explanation:

- Minor 2nd (m2) = 1 half step (e.g., E–F, B–C, C#–D, etc.)
- Major 2nd (M2) = 2 half steps (e.g., C–D, F–G, etc.)
- Unisons (same pitch) are not seconds, so they are not classified as M2 or m2.

Thus, only intervals spanning one letter name apart (like C to D) are seconds, and we classify them based on half-step distance.

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✔ Conclusion:

The correct interval names are:

- m2 when the two notes are one half step apart (e.g., E–F, B–C)
- M2 when the two notes are two half steps apart (e.g., C–D, F–G)

Unisons are not seconds, so leave blank.

This completes the Interval Identification worksheet.