STEM Majors Deep-Dive
US STEM Majors, In Depth
Specific US STEM majors — physics, biology, chemistry, mathematics, statistics, neuroscience and environmental science — what each studies and where it leads.
Last updated
Tests this hub covers
SAT
College Board · 8 weekend test dates a year (2026–27: Aug, Sep, Oct, Nov, Dec, Mar, May, Jun; same for U.S. and international)
ACT
ACT (ACT Education Corp.) · 7 test dates a year, in the U.S. and outside it (2026–27: Sep, Oct, Dec, Feb, Apr, Jun, Jul; most non-U.S. dates are two-day windows)
AP Exams
College Board · Once a year (May)
What this hub covers
- Physics and Astronomy Major Guide (USA)What a physics or astronomy degree covers · Lab work, computation, and undergraduate research · Degree structures and how programmes differ
- Biology Major Guide (USA)What a biology degree covers · Common sub-tracks within biology · Laboratory and field experience
- Chemistry Major Guide (USA)What a chemistry degree covers · ACS-accredited and general chemistry tracks · Lab safety and hands-on skills
- Mathematics and Statistics Majors (USA)The shared foundation · Pure mathematics · Applied mathematics
- Neuroscience and Environmental Science Majors (USA)Two interdisciplinary STEM majors, compared · What a neuroscience major studies · What an environmental science major studies
Guides for United States
5 of 5 guides in this hub are for the United States.
Physics and Astronomy Major Guide (USA)
What a US physics or astronomy degree covers — mechanics, quantum, astrophysics, lab and computational work — and where it can lead.
Read guideBiology Major Guide (USA)
What US biology degrees study across molecular, ecology, microbiology and biotech tracks, and the many directions beyond pre-med — described, not judged.
Read guideChemistry Major Guide (USA)
What a US chemistry degree involves — organic, physical, analytical, biochemistry, ACS-accredited tracks — and the research, pharma and materials paths it opens.
Read guideMathematics and Statistics Majors (USA)
How pure math, applied math and statistics degrees differ in coursework and direction in the US — distinct from the data-science and AI major guide.
Read guideNeuroscience and Environmental Science Majors (USA)
What these two interdisciplinary US STEM majors study and where each leads — for students weighing brain science against earth and sustainability paths.
Read guideStudying in the United States
Continue exploring the United States
Universities, entrance tests, costs and visa facts for the United States — all in one place, each linked to its official source.
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