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 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.
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 fish that grows faster than its shoal
A plant with a deeper root
A rabbit with slightly longer legs
A tree that flowers a week earlier
A.Sets seed before the summer drought
B.Is too big for smaller predators sooner
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 flower with a brighter colour
A beetle with a harder shell
A.Attracts more bees, so more seed is set
B.Cracks seeds others cannot open
C.Is spotted less often by birds
D.Survives being trodden on or pecked
LessonPrint · 3-LS4-2 · Set 22 · free to copy for classroom use
Answer key — A Small Difference That Helps
Set 22. Prints on its own sheet.
1.1. A fish that grows faster than its shoal — B (Is too big for smaller predators sooner) 2. A plant with a deeper root — D (Reaches water in a dry summer) 3. A rabbit with slightly longer legs — C (Escapes a fox more often) 4. A tree that flowers a week earlier — A (Sets seed before the summer drought)
2.1. A moth whose wings match the bark — C (Is spotted less often by birds) 2. A bird with a stronger beak — B (Cracks seeds others cannot open) 3. A flower with a brighter colour — A (Attracts more bees, so more seed is set) 4. A beetle with a harder shell — D (Survives being trodden on or pecked)
More practice for 3-LS4-2
Explain how differences between individuals help them survive and reproduce.