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AST101 Final Exam Questions – Astronomy Study Guide UofT

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AST101 Final Exam Questions – Astronomy Study Guide UofT

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126 pages

2026/2027

Institution AST 101

Course AST 101

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Prepare for your AST101 Astronomy Final Exam with this exam-focused study resource associated with the University of Toronto (UofT). Designed for students reviewing introductory astronomy concepts and preparing for their final assessment. Use these exam questions to support your revision, practise recalling key concepts, and identify areas that may require further study. Ideal for students looking for AST101 final exam preparation materials, astronomy revision resources, and UofT course study guides. Course: AST101 – Astronomy Institution: University of Toronto (UofT) Assessment: Final Exam Resource: Exam questions and revision material Format: PDF

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AST101/./Final/./Exam/./Questions/./Uoft

Roughly/./how/./many/./stars/./are/./in/./the/./Milky/./Way/./Galaxy?/./
A)/./1/./billion
B)/./100/./billion/./
C)/./10/./billion/./
D)/./100/./million/./

E)/./100/./trillion/./-/./correct/./answer/./✔ ✔ B

Which/./of/./the/./following/./statements/./does/./not/./use/./the/./term/./light-
year/./in/./an/./appropriate/./way?/./
A)/./It's/./about/./4/./light-years/./from/./here/./to/./Alpha/./Centauri.
B)/./It/./will/./take/./me/./light-years/./to/./complete/./this/./homework/./assignment././
C)/./A/./light-year/./is/./about/./10/./trillion/./kilometres.
D)/./It/./will/./take/./the/./Voyager/./spacecraft/./about/./20,000/./years/./to/./travel/./jus
t/./1/./light-year././E)/./The/./Milky/./Way/./Galaxy/./is/./about/./100,000/./light-
years/./in/./diameter././-/./correct/./answer/./✔ ✔ B

,What/./makes/./the/./North/./Star,/./Polaris,/./special?
A)/./It/./is/./the/./brightest/./star/./in/./the/./sky.
B)/./It/./is/./the/./star/./straight/./overhead.
C)/./It/./appears/./very/./near/./the/./north/./celestial/./pole././
D)/./It/./is/./the/./star/./directly/./on/./your/./northern/./horizon.
E)/./It/./can/./be/./used/./to/./determine/./your/./longitude/./on/./Earth././-
/./correct/./answer/./✔ ✔ C

If/./the/./Moon/./is/./setting/./at/./6/./A.M.,/./the/./phase/./of/./the/./Moon/./must/./be
A)/./first/./quarter.
B)/./third/./quarter.
C)/./full././
D)/./new.

E)/./waning/./crescent././-/./correct/./answer/./✔ ✔ C

Kepler's/./second/./law,/./which/./states/./that/./as/./a/./planet/./moves/./around/./its/./or
bit/./it/./sweeps/./out/./equal/./areas/./in/./equal/./times,/./means/./that
A)/./a/./planet/./travels/./faster/./when/./it/./is/./nearer/./to/./the/./Sun/./and/./slower/./whe
n/./it/./is/./farther/./from/./the/./Sun././
B)/./a/./planet's/./period/./does/./not/./depend/./on/./the/./eccentricity/./of/./its/./orbit.
C)/./planets/./that/./are/./farther/./from/./the/./Sun/./move/./at/./slower/./average/./speed
s/./than/./nearer

,planets.
D)/./the/./period/./of/./a/./planet/./does/./not/./depend/./on/./its/./mass.

E)/./planets/./have/./circular/./orbits././-/./correct/./answer/./✔ ✔ A

What/./would/./happen/./if/./the/./Space/./Shuttle/./were/./launched/./with/./a/./speed/./
greater/./than/./Earth's/./escape/./velocity?
A)/./It/./would/./travel/./away/./from/./Earth/./into/./the/./solar/./system././
B)/./It/./would/./travel/./in/./a/./higher/./orbit/./around/./Earth.
C)/./It/./would/./take/./less/./time/./to/./reach/./its/./bound/./orbit.
D)/./It/./would/./orbit/./Earth/./at/./a/./faster/./velocity.

E)/./It/./would/./be/./in/./an/./unstable/./orbit././-/./correct/./answer/./✔ ✔ A

At/./which/./lunar/./phase(s)/./are/./tides/./least/./pronounced/./(e.g.,/./the/./lowest/./hi
gh/./tides)?/./
A)/./first/./quarter
B)/./new/./Moon
C)/./full/./Moon
D)/./both/./new/./and/./full/./Moons

E)/./both/./first/./and/./third/./quarters/./-/./correct/./answer/./✔ ✔ E

At/./the/./centre/./of/./the/./Sun,/./fusion/./converts/./hydrogen/./into/./

, A)/./hydrogen/./compounds.
B)/./Plasma.
C)/./radiation/./and/./elements/./like/./carbon/./and/./nitrogen.
D)/./radioactive/./elements/./like/./uranium/./and/./plutonium././

E)/./helium,/./energy,/./and/./neutrinos/./-/./correct/./answer/./✔ ✔ E

Grass/./appears/./green/./because
A)/./it/./emits/./green/./light/./and/./absorbs/./other/./colours.
B)/./it/./absorbs/./green/./light/./and/./emits/./other/./colours.
C)/./it/./transmits/./green/./light/./and/./emits/./other/./colours././
D)/./it/./reflects/./green/./light/./and/./absorbs/./other/./colours/./-/./correct/./answer/./
✔ ✔ D

If/./you/./heat/./a/./gas/./so/./that/./collisions/./are/./continually/./bumping/./electrons/./t
o/./higher/./energy/./levels,/./when/./the/./electrons/./fall/./back/./to/./lower/./energy/./l
evels/./the/./gas/./produces
A)/./thermal/./radiation.
B)/./an/./absorption/./line/./spectrum././
C)/./an/./emission/./line/./spectrum././
D)/./X-rays.

E)/./radio/./waves././-/./correct/./answer/./✔ ✔ C

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Uploaded on: October 12, 2026
Number of pages: 126
Written in: 2026/2027
Type: Exam (elaborations)
Contains: Questions & answers

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