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 11 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.
Tiny tubes inside a stem
A fish's gills
A goat's split hooves
A seed's hard coat
A.Carry water up to the leaves
B.Take in oxygen from the water
C.Protects the tiny plant inside until it sprouts
D.Grip on steep rocky slopes
2.Draw a line from each one to its match.
A heart
An owl's large eyes
A rose's thorns
A flower's bright petals
A.Pumps blood around the body
B.Attract insects that carry pollen
C.Stop animals eating the stem
D.Gather enough light to hunt at night
LessonPrint · 4-LS1-1 · Set 11 · free to copy for classroom use
Answer key — What the Structure Is For
Set 11. Prints on its own sheet.
1.1. Tiny tubes inside a stem — A (Carry water up to the leaves) 2. A fish's gills — B (Take in oxygen from the water) 3. A goat's split hooves — D (Grip on steep rocky slopes) 4. A seed's hard coat — C (Protects the tiny plant inside until it sprouts)
2.1. A heart — A (Pumps blood around the body) 2. An owl's large eyes — D (Gather enough light to hunt at night) 3. A rose's thorns — C (Stop animals eating the stem) 4. A flower's bright petals — B (Attract insects that carry pollen)
Last reviewed 2026-09-05. Aligned to 4-LS1-1 of the Next Generation Science Standards.