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Sunflowers in Sun and Shade is a free printable Grade 3 science worksheet on using measured heights as evidence that surroundings change a trait, aligned to NGSS performance expectation 3-LS3-2. It prints 7 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 15 of 25 · the same problems every time you open this link.

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Set 1 has all 25 in a single PDF. All 25 sets ask different questions.

Sunflowers in Sun and Shade

3-LS3-2

NameDate

Read the record, then answer the questions.

1.Read the record, then answer the questions.

Sunflowers From One Packet

Heights measured after ten weeks, from one packet of seed sown in two places. HEIGHTS AFTER TEN WEEKS Sunny bed: 148 cm, 152 cm, 139 cm, 155 cm, 144 cm Shady bed: 96 cm, 88 cm, 102 cm, 91 cm, 85 cm All seeds came from the same packet. All had the same soil and the same watering. Every plant had yellow flowers and a thick stem.

  1. 1. What was the tallest plant in the sunny bed?
  2. 2. What would a third bed with even less light probably show?
  3. 3. How do the two beds compare?
  4. 4. What was the shortest plant in the shady bed?
2.Two cuttings from one geranium grow on a sunny windowsill and in a dark corner. Which will probably have greener, sturdier leaves?
  • A.Both exactly the same, because they came from one plant
  • B.The one in the dark corner
  • C.The one on the sunny windowsill
3.A dog is given too much food and little exercise. What may happen?
  • A.It becomes overweight
  • B.It grows a longer tail
  • C.Its puppies will be overweight
4.Hydrangea bushes of one kind have blue flowers in some soils and pink in others. What causes the difference?
  • A.The soil they grow in
  • B.The bushes are different kinds
  • C.The gardener's favorite color
5.A tree on a windy hilltop is short and bent. A tree of the same kind in a valley is tall and straight. What explains it?
  • A.The two trees are different kinds
  • B.The wind on the hilltop affected how it grew
  • C.The hilltop tree is older
6.Flamingos get their pink color from the food they eat. What does that show?
  • A.The color is only inherited
  • B.All birds are pink
  • C.Their surroundings, through their food, affect a trait
7.Identical twins grow up apart, and one does far more sport. One is much stronger. Inherited or surroundings?
  • A.Neither
  • B.Surroundings, because the twins started the same
  • C.Inherited, because they are twins

LessonPrint · 3-LS3-2 · Set 15 · free to copy for classroom use

Answer key — Sunflowers in Sun and Shade

Set 15. Prints on its own sheet.

  1. 1.1. 155 cm. 2. Plants shorter than the shady bed's, if less sunlight means less growth. 3. Every plant in the sunny bed was taller than every plant in the shady bed. 4. 85 cm.
  2. 2.The one on the sunny windowsill
  3. 3.It becomes overweight
  4. 4.The soil they grow in
  5. 5.The wind on the hilltop affected how it grew
  6. 6.Their surroundings, through their food, affect a trait
  7. 7.Surroundings, because the twins started the same

Last reviewed 2026-09-05. Aligned to 3-LS3-2 of the Next Generation Science Standards.