When the Sea Changes is a free printable Grade 3 science worksheet on judging a solution when people change an ocean habitat, aligned to NGSS performance expectation 3-LS4-4. It prints 2 questions with an answer key on its own sheet of paper, in 25 versions, 19 of them with different questions, so no two students in the class work from the same page. Print it from the browser or download it as a PDF — no account, no email.
Set 12 of 25 · the same problems every time you open this link.
Set 1 has all 25 in a single PDF. 19 of these 25 sets ask different questions — this skill does not have 25 questions to give. The rest reorder them, so no two students have the same paper in front of them.
When the Sea Changes
3-LS4-4
NameDate
Write your answer. Use the checklist.
1.So many cod have been caught that few are left to lay eggs. Judge one solution.
Name the solution
Say how the cod would recover
Say who it costs
2.Fishing nets left in the sea are trapping seals and dolphins. Judge one solution.
Name the solution
Say how it helps the animals
Say one drawback
LessonPrint · 3-LS4-4 · Set 12 · free to copy for classroom use
Answer key — When the Sea Changes
Set 12. Prints on its own sheet.
1.A solution such as limiting the catch or closing an area to fishing so the cod can breed, naming the fishing crews as bearing the cost.
2.A solution such as collecting lost nets or paying crews to bring old nets back, how it protects the seals and dolphins, and a drawback.
Last reviewed 2026-09-05. Aligned to 3-LS4-4 of the Next Generation Science Standards.