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 23 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.Turtles in a bay are eating plastic bags, which look like jellyfish in the water. Judge one solution.
Name the solution
Say how it helps the turtles
Say one drawback
LessonPrint · 3-LS4-4 · Set 23 · free to copy for classroom use
Answer key — When the Sea Changes
Set 23. 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 charging for plastic bags or clearing the bay, how it protects the turtles, and a drawback such as cost or people ignoring it.
Last reviewed 2026-09-05. Aligned to 3-LS4-4 of the Next Generation Science Standards.