Week 7 — Quiz (auto-graded) · Intervals II

Course: MUS 156 Music Theory I · Kenosis College
Instructor: Professor Hemsworth
Unit: Learning Unit 7 of 16 (Week 7) · two sessions per week
Objectives tested: SLO 3 (identify, spell, and reason about intervals, simple and compound) · SLO 7 (turn a heard/described move into the right name)
Points: 10 (10 × 1) · Group: Quizzes (lowest 2 of 14 dropped) · Due: the end of Week 7 · online, 15-minute timer, 1 attempt, closed to AI.

This is the human-readable quiz with its vetted answer key and feedback. The import-ready QTI is rendered by the build system from _build/banks/lu-07.json, which also holds this unit's 15 exam-pool items (idents k3lu07x01–x15) — those test the same concepts with different stems, feed the midterm, and never appear on this quiz. Every item below is answerable from text alone; no images required.

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Blueprint

The table below maps each item to its type, concept, and objective.

#	Type	Concept(s)	Objective
1	Multiple choice	Compound intervals — naming	SLO 3
2	Multiple choice	Compound intervals — the +7 rule	SLO 3
3	Multiple choice	The tritone — spelling the A4	SLO 3
4	True / False	A4 vs. d5 — enharmonic ≠ equal	SLO 3
5	Multiple choice	Consonance and dissonance — the sort	SLO 3
6	Multiple choice	The perfect fourth — context-dependent	SLO 3
7	Multiple choice	Enharmonic intervals — m3 vs. A2	SLO 3
8	Multiple choice	Tritone + inversion (Week 6 machinery)	SLO 3
9	Multiple choice	Leap-mapping — spell the landing note	SLO 7
10	Matching	Compound ↔ simple pairs	SLO 3

No trick questions; every distractor targets a misconception named in the Week 7 outline (compound-as-new-information, tritone-is-always-A4, P4-is-always-consonant, enharmonic-means-equal, spelling-from-scratch instead of leap-mapping).

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Questions, key, and feedback

Q1 (MC). A cello sounds F3 while the vocalist answers on the G4 a ninth higher. Precisely named, the interval between them is —

• A. M2
• B. M9 ✅
• C. M10
• D. m9

Feedback: Nine letters from F through G, an octave and a whole step wide: a major ninth, not to be shrunk on paper.

Q2 (MC). Push any interval one octave wider and its size number climbs by —

• A. 8
• B. 9
• C. 7 ✅
• D. 12

Feedback: Octave displacement adds seven, never eight — so a second grows into a ninth and a sixth into a thirteenth.

Q3 (MC). Which pitch stands an augmented fourth above B♭3?

• A. E♭4
• B. E4 ✅
• C. F4
• D. F♭4

Feedback: Four letters up from B♭ is E; six half steps push that fourth to augmented — E4, where F♭4 would spell a fifth.

Q4 (True/False). G4–C♯5 and G4–D♭5 each measure six half steps, which makes them the same interval.

• True
• False ✅

Feedback: One sound, two spellings: G-to-C♯ is an augmented fourth while G-to-D♭ is a diminished fifth — two different intervals.

Q5 (MC). One interval below is a dissonance. Which?

• A. M2 ✅
• B. m6
• C. P8
• D. m3

Feedback: Seconds and sevenths (plus the tritone) carry tension; thirds, sixths, fifths, and octaves ring stable.

Q6 (MC). The perfect fourth receives a special ruling in this course's sorting. What is it?

• A. stable between upper parts, a tension over the bass ✅
• B. a full consonance wherever it appears
• C. a full dissonance wherever it appears
• D. consonant in minor keys, dissonant in major ones

Feedback: Placement decides the fourth: fine among upper voices, but sounded against the bass it must resolve.

Q7 (MC). D4–F4 and D4–E♯4 call for the very same two piano keys. Their written names, though, are —

• A. two minor thirds
• B. two augmented seconds
• C. first a major second, then a diminished third
• D. first a minor third, then an augmented second ✅

Feedback: F4 and E♯4 share a sound only; the letters make one interval a minor third and the other an augmented second.

Q8 (MC). Flip a diminished fifth at the octave. What comes back?

• A. a perfect fifth
• B. another diminished fifth
• C. an augmented fourth ✅
• D. a perfect fourth

Feedback: The two tritone spellings invert into each other: d5 up-ends into A4.

Q9 (MC). Mapping a melody by its leaps: your anchor note is G3, and the next jump rises a major sixth. The note you notate is —

• A. E4 ✅
• B. E♭4
• C. D4
• D. F4

Feedback: Sixth letter above G is E, nine half steps up from G3: E4 — an anchor plus a spelled distance.

Q10 (Matching). Strip the octave out of each wide interval and match what remains.

Answer bank: m2 · m3 · A4 · m6 · m7

• m9 → m2 ✅
• m10 → m3 ✅
• A11 → A4 ✅
• m13 → m6 ✅
• m14 → m7 ✅

Feedback: Subtract seven from the size and keep the quality: 9 folds to 2, 10 to 3, 11 to 4, 13 to 6, 14 to 7.

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Answer key (quick reference)

The table below lists each item's correct response.

Q	Answer
1	B
2	C
3	B
4	False
5	A
6	A
7	D
8	C
9	A
10	m9 → m2 · m10 → m3 · A11 → A4 · m13 → m6 · m14 → m7

Quality gate (machine-checked): exactly one correct option per single-answer item; the multiple-choice key sequence B C B A A D C A carries no run longer than two and no positional lean; option lengths balanced within each item; every spelling claim verified against the course theory reference by the correctness gate; no item tests material from a later unit; no stem or scenario reuses the tutorial, practice, chapter, studio, assignment, or exam-pool surfaces (leakage-checked mechanically at build time).

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Item-bank note (instructor-facing)

The ten quiz items above carry idents k3lu07q01–k3lu07q10 in _build/banks/lu-07.json, each tagged with its ledger concept_ids and objective. The same bank holds k3lu07x01–k3lu07x15: fifteen exam-pool items on the same five Week 7 concepts with fully different stems (zero text overlap — the leakage gate checks). The midterm draws from the pool, never from the live quiz.

Canvas placement block

canvas_object    = Quizzes::Quiz
title            = "Week 7 Quiz — Intervals II"
assignment_group = "Quizzes"
points_possible  = 10
grading_type     = points
time_limit       = 15
allowed_attempts = 1
shuffle_answers  = true
due              = the end of Week 7
published        = true
access_note      = "Closed to AI — just you and the letters. The proctored midterm (next week) works the same way."

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