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 18 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 flower's bright petals
A goat's split hooves
An owl's large eyes
A skeleton
A.Holds the body up and lets it move
B.Grip on steep rocky slopes
C.Attract insects that carry pollen
D.Gather enough light to hunt at night
2.Draw a line from each one to its match.
A rose's thorns
Tiny tubes inside a stem
A seed's hard coat
Lungs
A.Protects the tiny plant inside until it sprouts
B.Stop animals eating the stem
C.Carry water up to the leaves
D.Take in oxygen from the air
LessonPrint · 4-LS1-1 · Set 18 · free to copy for classroom use
Answer key — What the Structure Is For
Set 18. Prints on its own sheet.
1.1. A flower's bright petals — C (Attract insects that carry pollen) 2. A goat's split hooves — B (Grip on steep rocky slopes) 3. An owl's large eyes — D (Gather enough light to hunt at night) 4. A skeleton — A (Holds the body up and lets it move)
2.1. A rose's thorns — B (Stop animals eating the stem) 2. Tiny tubes inside a stem — C (Carry water up to the leaves) 3. A seed's hard coat — A (Protects the tiny plant inside until it sprouts) 4. Lungs — D (Take in oxygen from the air)
Last reviewed 2026-09-05. Aligned to 4-LS1-1 of the Next Generation Science Standards.