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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 23 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 shortest plant in the shady bed?
  2. 2. What would a third bed with even less light probably show?
  3. 3. What was kept the same between the two beds?
  4. 4. What does this record not tell you?
2.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 gardener's favorite color
  • C.The bushes are different kinds
3.A seedling grown in a dark cupboard is pale and spindly. What caused that?
  • A.It came from a pale parent
  • B.It was too warm
  • C.Growing without light
4.A dog is given too much food and little exercise. What may happen?
  • A.Its puppies will be overweight
  • B.It becomes overweight
  • C.It grows a longer tail
5.How could you test whether light affects the height of a plant?
  • A.Grow one plant and measure it once
  • B.Grow seeds from one packet, some in light and some in shade, with everything else the same
  • C.Grow different kinds of seed in the same place
6.Flamingos get their pink color from the food they eat. What does that show?
  • A.All birds are pink
  • B.Their surroundings, through their food, affect a trait
  • C.The color is only inherited
7.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 hilltop tree is older
  • B.The wind on the hilltop affected how it grew
  • C.The two trees are different kinds

LessonPrint · 3-LS3-2 · Set 23 · free to copy for classroom use

Answer key — Sunflowers in Sun and Shade

Set 23. Prints on its own sheet.

  1. 1.1. 85 cm. 2. Plants shorter than the shady bed's, if less sunlight means less growth. 3. The same seed packet, the same soil and the same watering. 4. It does not tell you how much sunlight each bed actually received.
  2. 2.The soil they grow in
  3. 3.Growing without light
  4. 4.It becomes overweight
  5. 5.Grow seeds from one packet, some in light and some in shade, with everything else the same
  6. 6.Their surroundings, through their food, affect a trait
  7. 7.The wind on the hilltop affected how it grew

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