What the Structure Is For is a free printable Grade 4 science worksheet on how internal and external structures support survival, growth and reproduction, aligned to NGSS performance expectation 4-LS1-1. It prints 2 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 22 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.
What the Structure Is For
4-LS1-1
NameDate
Draw a line from each structure to what it does.
1.Draw a line from each one to its match.
A bird's hollow bones
An owl's large eyes
Tiny tubes inside a stem
A skeleton
A.Carry water up to the leaves
B.Holds the body up and lets it move
C.Gather enough light to hunt at night
D.Keep it light enough to fly
2.Draw a line from each one to its match.
A rose's thorns
A duck's webbed feet
A plant's roots
A heart
A.Stop animals eating the stem
B.Push against the water to swim
C.Anchor it in the soil and take in water
D.Pumps blood around the body
LessonPrint · 4-LS1-1 · Set 22 · free to copy for classroom use
Answer key — What the Structure Is For
Set 22. Prints on its own sheet.
1.1. A bird's hollow bones — D (Keep it light enough to fly) 2. An owl's large eyes — C (Gather enough light to hunt at night) 3. Tiny tubes inside a stem — A (Carry water up to the leaves) 4. A skeleton — B (Holds the body up and lets it move)
2.1. A rose's thorns — A (Stop animals eating the stem) 2. A duck's webbed feet — B (Push against the water to swim) 3. A plant's roots — C (Anchor it in the soil and take in water) 4. A heart — D (Pumps blood around the body)
Last reviewed 2026-09-05. Aligned to 4-LS1-1 of the Next Generation Science Standards.