What an earth science course description needs to cover
Earth science covers four branches, and the description should show the course touched all of them: geology, meteorology, oceanography, and astronomy. Beyond scope, a reader wants the grade year it was taken, the main text, any hands-on work (rock identification, weather tracking, telescope time), and the grading method.
Grade placement is the detail that matters most for this course. Earth science is taught anywhere from 6th grade to 9th, so the description needs to make clear this was high school level work: a high school text, high school hours, graded exams.
Counting the credit
Done in 9th grade or later with a high school text, a full year of earth science at 120 to 180 hours earns 1.0 science credit. It usually sits at the front of the sequence, before biology, and works well for a student who needs another year of math before the run of biology, chemistry, and physics. Colleges generally read it as a solid science credit rather than a lab science, so plan at least two traditional lab sciences after it. For how the whole four-year plan fits together, see how to homeschool high school.
Mistakes to avoid
Using a middle school text and claiming high school credit. The resource named in the description signals the level. An 8th grade text undercuts the credit.
Leaving out astronomy or oceanography. A geology-only year is fine, but title it "Geology" rather than earth science.
No hands-on evidence. Rock kits, weather logs, and star charts are cheap and easy to document. A description without any of them reads like textbook-only.
Vague placement. If the course was taken in 9th grade, the transcript should show it there plainly, since courses from 9th grade on are what most colleges review.
Keep the records as you go
Field trips, sample collections, and weather logs are exactly the kind of scattered evidence that vanishes by transcript time. Keep them in one place with Homeschool Fox as the year runs, and the course description guide will walk you through turning that log into the finished paragraph.