Inside and Outside is a free printable Grade 4 science worksheet on arguing that internal and external structures support survival, aligned to Common Core standard 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 pupils in the class work from the same page. Print it from the browser or download it as a PDF — no account, no email.

Set 25 of 25 · the same problems every time you open this link.

One paper per pupil

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25

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 tree's bark, A stomach digesting food, A rabbit's ears, A skeleton holding the body up

Outside structureInside structure

2.Sort each one: Outside structure or Inside structure?

Sort: A rose's thorns, Roots drawing up water, A stem carrying water to the leaves, A bird's feathers

Outside structureInside structure

3.Sort each one: Outside structure or Inside structure?

Sort: Lungs taking in air, A heart pumping blood, A cactus's spines, A fish's scales

Outside structureInside structure

LessonPrint · 4-LS1-1 · Set 25 · free to copy for classroom use

Answer key — Inside and Outside

Set 25. Prints on its own sheet.

1.1. A rabbit's ears — Outside structure 2. A skeleton holding the body up — Inside structure 3. A stomach digesting food — Inside structure 4. A tree's bark — Outside structure
2.1. A bird's feathers — Outside structure 2. A rose's thorns — Outside structure 3. A stem carrying water to the leaves — Inside structure 4. Roots drawing up water — Inside structure
3.1. A cactus's spines — Outside structure 2. A fish's scales — Outside structure 3. A heart pumping blood — Inside structure 4. Lungs taking in air — 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.

All Grade 4 worksheets

Last reviewed 2026-09-05. Aligned to 4-LS1-1 of the Next Generation Science Standards.