Inside and Outside is a free printable Grade 4 science worksheet on telling a living thing's internal structures from its external ones, aligned to NGSS performance expectation 4-LS1-1. It prints 3 questions with an answer key on its own sheet of paper, in 25 versions that each ask 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 21 of 25 · the same problems every time you open this link.
Set 1 has all 25 in a single PDF. All 25 sets ask different questions.
Inside and Outside
4-LS1-1
NameDate
Sort each structure into inside or outside.
1.Sort each one: Outside structure or Inside structure?
Sort: A brain, which controls the body, A rabbit's long ears, which catch faint sounds, Lungs, which take in air, A tree's bark, which protects the trunk
Outside structureInside structure
2.Sort each one: Outside structure or Inside structure?
Sort: A stomach, which breaks down food, A fish's scales, which protect its skin, A bird's feathers, which keep it warm, A heart, which pumps blood around the body
Outside structureInside structure
3.Sort each one: Outside structure or Inside structure?
Sort: A rose's thorns, which keep animals off the stem, A skeleton, which holds the body up, Tiny tubes inside a stem, which carry water to the leaves, A cactus's spines, which stop animals eating it
Outside structureInside structure
LessonPrint · 4-LS1-1 · Set 21 · free to copy for classroom use
Answer key — Inside and Outside
Set 21. Prints on its own sheet.
1.1. A brain, which controls the body — Inside structure 2. A rabbit's long ears, which catch faint sounds — Outside structure 3. A tree's bark, which protects the trunk — Outside structure 4. Lungs, which take in air — Inside structure
2.1. A bird's feathers, which keep it warm — Outside structure 2. A fish's scales, which protect its skin — Outside structure 3. A heart, which pumps blood around the body — Inside structure 4. A stomach, which breaks down food — Inside structure
3.1. A cactus's spines, which stop animals eating it — Outside structure 2. A rose's thorns, which keep animals off the stem — Outside structure 3. A skeleton, which holds the body up — Inside structure 4. Tiny tubes inside a stem, which carry water to the leaves — Inside structure
More practice for 4-LS1-1
Argue that inside and outside body parts help a living thing survive and grow.
Teaching this next? Inside and Outside is the 55-minute plan for it, with the misconceptions to expect.