Week 6 — Quiz (auto-graded) · Intervals I

Course: MUS 156 Music Theory I · Kenosis College
Instructor: Professor Hemsworth
Unit: Learning Unit 6 of 16 (Week 6) · two sessions per week
Objectives tested: SLO 3 (identify, spell, and invert intervals) · SLO 7 (name what you hear — here, name what you can spell)
Points: 10 (10 × 1) · Group: Quizzes (lowest 2 of 14 dropped) · Due: the end of Week 6 · 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-06.json, which also holds this unit's 15 exam-pool items (idents k3lu06x01–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	Size from letter distance	SLO 3
2	Multiple choice	Quality independent of key-count (the E♯ trap)	SLO 3
3	Multiple choice	The perfect family	SLO 3
4	Matching	Intervals above do in the major scale	SLO 3
5	Multiple choice	Minor sixth by two rulers	SLO 3
6	True / False	Inversion of perfect intervals	SLO 3
7	Multiple choice	Inversion arithmetic	SLO 3
8	Multiple choice	Spelling below a given note	SLO 3
9	Multiple choice	Minor seventh by two rulers	SLO 3
10	Multiple choice	The interval bank in solfège	SLO 7

No trick questions; every distractor targets a misconception named in the Week 6 outline (counting keys instead of letters, half-steps-as-names, family mixing, inversion flipping perfect quality, the letter and octave traps below).

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Questions, key, and feedback

Q1 (MC). Judging by letter names alone (count the bottom note and the top note too), B3 up to A4 spans —

• A. a sixth
• B. a seventh ✅
• C. an octave
• D. a fifth

Feedback: Letters B through A touch seven names, so the size is a seventh before quality even enters the picture.

Q2 (MC). Five half steps sit between G4 and the B♯4 above it, so a friend labels the pair a perfect fourth. The spelling-honest name is —

• A. a perfect fourth
• B. a major third
• C. an augmented third ✅
• D. a diminished fourth

Feedback: G to B is a third by letters; five half steps stretch that third to augmented — letters first, always.

Q3 (MC). The label "perfect" is available to certain interval sizes and never to the rest. Which sizes accept it?

• A. the unison, fourth, fifth, and octave ✅
• B. the second, third, sixth, and seventh
• C. any size at all, if the key cooperates
• D. the unison and the octave, nothing more

Feedback: Perfect belongs to the 1-4-5-8 family; the other sizes run on the major-minor track instead.

Q4 (Matching). Inside G major, pair each interval built up from the tonic G4 with the note where it lands.

Answer bank: B4 · C5 · D5 · E5 · F♯5

• major third → B4 ✅
• perfect fourth → C5 ✅
• perfect fifth → D5 ✅
• major sixth → E5 ✅
• major seventh → F♯5 ✅

Feedback: Climbing from G4, the key hands you B4, C5, D5, E5, and F♯5 at degrees three through seven.

Q5 (MC). Name the interval from D4 up to B♭4.

• A. a major sixth
• B. a perfect fifth
• C. a minor seventh
• D. a minor sixth ✅

Feedback: Six letters, D through B, set the size; eight half steps make the sixth minor rather than major.

Q6 (True/False). Turn a perfect fifth upside down at the octave and the result is still a perfect interval.

• True ✅
• False

Feedback: Inversion swaps P5 for P4 — the perfect family never leaves itself.

Q7 (MC). What does a minor third become once it is inverted?

• A. a major sixth ✅
• B. a minor sixth
• C. a major third
• D. an augmented sixth

Feedback: Sizes pair off to total nine (3 + 6) while the qualities trade — minor flips to major.

Q8 (MC). Which pitch sits a perfect fifth BELOW E5?

• A. B4
• B. E4
• C. A4 ✅
• D. G4

Feedback: Walk down five letters from E — E, D, C, B, A — then confirm seven half steps: A4.

Q9 (MC). From A3 up to the G4 above it — which interval is that?

• A. a major seventh
• B. a minor sixth
• C. a major second
• D. a minor seventh ✅

Feedback: A up to G touches seven letter names, and ten half steps keep that seventh minor.

Q10 (MC). No matter which major key you sing in, do up to sol always measures —

• A. a perfect fourth
• B. a perfect fifth ✅
• C. a major sixth
• D. a major third

Feedback: Sol names the fifth degree, and tonic up to fifth degree stays perfect wherever the key sits.

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Answer key (quick reference)

The table below lists each item's correct response.

Q	Answer
1	B
2	C
3	A
4	major third → B4 · perfect fourth → C5 · perfect fifth → D5 · major sixth → E5 · major seventh → F♯5
5	D
6	True
7	A
8	C
9	D
10	B

Quality gate (machine-checked): exactly one correct option per single-answer item; the multiple-choice key sequence B C A D A C D B 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 k3lu06q01–k3lu06q10 in _build/banks/lu-06.json, each tagged with its ledger concept_ids and objective. The same bank holds k3lu06x01–k3lu06x15: fifteen exam-pool items on the same eight Week 6 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 6 Quiz — Intervals I"
assignment_group = "Quizzes"
points_possible  = 10
grading_type     = points
time_limit       = 15
allowed_attempts = 1
shuffle_answers  = true
due              = the end of Week 6
published        = true
access_note      = "Closed to AI — this one is just you and the two rulers. The proctored midterm works the same way."

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