A Small Difference That Helps is a free printable Grade 3 science worksheet on how variation among individuals can give an advantage, aligned to Common Core standard 3-LS4-2. 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 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 7 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.
A Small Difference That Helps
3-LS4-2
NameDate
Draw a line from each variation to the advantage.
1.Draw a line from each one to its match.
A beetle with a harder shell
A tree that flowers a week earlier
A rabbit with slightly longer legs
A fish that grows faster than its shoal
A.Sets seed before the summer drought
B.Survives being trodden on or pecked
C.Escapes a fox more often
D.Is too big for smaller predators sooner
2.Draw a line from each one to its match.
A moth whose wings match the bark
A plant with a deeper root
A bird with a stronger beak
A flower with a brighter colour
A.Is spotted less often by birds
B.Reaches water in a dry summer
C.Attracts more bees, so more seed is set
D.Cracks seeds others cannot open
LessonPrint · 3-LS4-2 · Set 7 · free to copy for classroom use
Answer key — A Small Difference That Helps
Set 7. Prints on its own sheet.
1.1. A beetle with a harder shell — B (Survives being trodden on or pecked) 2. A tree that flowers a week earlier — A (Sets seed before the summer drought) 3. A rabbit with slightly longer legs — C (Escapes a fox more often) 4. A fish that grows faster than its shoal — D (Is too big for smaller predators sooner)
2.1. A moth whose wings match the bark — A (Is spotted less often by birds) 2. A plant with a deeper root — B (Reaches water in a dry summer) 3. A bird with a stronger beak — D (Cracks seeds others cannot open) 4. A flower with a brighter colour — C (Attracts more bees, so more seed is set)
More practice for 3-LS4-2
Explain how differences between individuals help them survive and reproduce.