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 14 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 rabbit with slightly longer legs
A flower with a brighter colour
A tree that flowers a week earlier
A plant with a deeper root
A.Sets seed before the summer drought
B.Attracts more bees, so more seed is set
C.Escapes a fox more often
D.Reaches water in a dry summer
2.Draw a line from each one to its match.
A moth whose wings match the bark
A bird with a stronger beak
A beetle with a harder shell
A fish that grows faster than its shoal
A.Is spotted less often by birds
B.Is too big for smaller predators sooner
C.Cracks seeds others cannot open
D.Survives being trodden on or pecked
LessonPrint · 3-LS4-2 · Set 14 · free to copy for classroom use
Answer key — A Small Difference That Helps
Set 14. Prints on its own sheet.
1.1. A rabbit with slightly longer legs — C (Escapes a fox more often) 2. A flower with a brighter colour — B (Attracts more bees, so more seed is set) 3. A tree that flowers a week earlier — A (Sets seed before the summer drought) 4. A plant with a deeper root — D (Reaches water in a dry summer)
2.1. A moth whose wings match the bark — A (Is spotted less often by birds) 2. A bird with a stronger beak — C (Cracks seeds others cannot open) 3. A beetle with a harder shell — D (Survives being trodden on or pecked) 4. A fish that grows faster than its shoal — B (Is too big for smaller predators sooner)
More practice for 3-LS4-2
Explain how differences between individuals help them survive and reproduce.