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A&O SCI 200B · Lec 1

Introduction to Dynamics of Earth System

Fall 2026Dong, Y.4 units

dibs reads this section's seats hourly, like everything else, but it does not send alerts for graduate courses yet.

Seats, time, final and grades

Seats

Open, 1 seat left.

19 of 20 enrolled.

Meets

TR 9:30am-10:50am

Every meeting the registrar lists for this section.

Final

Fri 11 Dec, 11:30am to 2:30pm

One exam for the whole class, Los Angeles time.

Read 4 days ago.

Grades

3.72
predicted, this instructor · 16 grades ·

16 letter grades, Dong, Y..

Read 18 minutes ago. This is a recent reading, not a live seat count.

Enroll on the registrar (opens in a new tab)

Put this class on a board

A board is one quarter you are drafting, so it needs an account to live in. Signing in brings you straight back to this page, with this class still in front of you.

Before you can enroll

Registrar's Restrictions cell, read 4 days ago: "Graduate Students".

Restrictions read 4 days ago. dibs re-reads these slowly because they rarely change, and it does not sweep graduate courses at all, so this one has no faster cadence to move to. Check the registrar.

When it meets

Mon
Tue
Wed
Thu
Fri
6am
7am
8am
9am
10am
11am
12pm
1pm
2pm
3pm
4pm
5pm
6pm
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9pm
10pm

Meets: TR 9:30am-10:50am

Mathematical Sciences 7121

Grades

3.72
predicted, this instructor · 16 grades ·

1 other person has taught A&O SCI 200B in the grade record: CHEN, GANG at 3.69 over 62 grades.

A range
81%
P/NP
0%
D/F/W
0.0%

Full grade history for A&O SCI 200B

What students say

dibs measures outcomes: grades, seats, how fast it fills. For what the class is actually like to sit in, BruinWalk has the reviews.

dibs has not read this course’s reviews, so it cannot say what kind of work it sets. That is dibs not having looked. It is not a course without papers or exams, and the reviews linked below are the answer until dibs catches up.

Will it still be here

Not a question any more: see the notice at the top of this page.

Final enrollment per term from four years of grade data. Summer excluded: different population, different pass structure.

  • 1621F
  • 1822F
  • 1623F
  • 1324F
  • 1625F
Enrollment by term: 21F 16, 22F 18, 23F 16, 24F 13, 25F 16

Peak 18 · most recent 25F at 16

Seats over time

Filled by 3 over about 2 months

1 time reopened
19 of 20 · 1 left
17 Aug 15:079 Sep 09:402 Oct 04:13
dibs read 168 of the 541 hours its hourly record covers, 31%, and did not look in 373. dibs had no hourly record before 9 Sep, which is the other 553 of 1094 plotted.19 of 20 enrolled at the newest reading, 18 minutes ago, with 1 left. Seats from 17 Aug 15:07 to 2 Oct 04:13, 16 to 19. dibs read 168 of the 541 hours its hourly record here covers, 31%. An hour marked as read confirms a check, not continuous monitoring. That check recorded no change; changes between checks may be missed. For 373 hours dibs was keeping a record and did not reach this section. Nothing before 9 September at 16:00, where this section's record starts, has a read either way, which is 553 hours of this window. Where the drawing is faint or broken, that never means the readings are doubtful. It means the stretch between them is unaccounted for.

A dot is a reading where something moved: the seat count, the status, or the waitlist. Flat between dots joins recorded counts; changes between reads may be missed. The line starts when dibs first saw this section rather than reaching back before it existed. The last one is the last time dibs read this section, moved or not: 18 minutes ago.

Show the readings (11)
Recorded Enrolled Capacity Status Waitlist Hours read
2 Oct 04:13 19 20 open 0 of 5 3 of 8
1 Oct 21:22 19 20 open 0 of 5 112 of 369
16 Sep 13:12 20 20 waitlist 0 of 5 9 of 27
15 Sep 11:32 19 20 open 0 of 5 47 of 299, 159 no hourly record
3 Sep 01:40 18 20 open 0 of 5 no hourly record
28 Aug 01:40 17 20 open 0 of 5 no hourly record
27 Aug 22:40 16 20 open 0 of 5 no hourly record
27 Aug 21:40 17 20 open 0 of 5 no hourly record
27 Aug 20:40 16 20 open 0 of 5 no hourly record
27 Aug 19:40 17 20 open 0 of 5 no hourly record
17 Aug 15:07 16 20 open 0 of 5 -
How readings and alerts work

A reading and an hourly record are different things, and most charts here hold more of the second missing than present. dibs has taken readings of a section since long before it began keeping an hour-by-hour log of when it looked, so the empty stretches are dibs saying it was not keeping that log yet, not that it looked and found nothing. That is the age of the record and not a fault.

Seat counts show the last successful read, not live availability. Refreshes can be delayed by request limits or upstream interruptions. Watched sections receive priority, but an hourly update for every section is not guaranteed.

The registrar can change a seat count between our checks. Alerts depend on dibs detecting an opening and completing delivery; a quiet watch does not prove that no seat opened. Check the registrar before enrolling.

Class chat

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