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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 7 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 claim does this record support?
  2. 2. How do the two beds compare?
  3. 3. What does this record not tell you?
  4. 4. What was kept the same between the two beds?
2.Why use seeds from the same packet when testing surroundings?
  • A.Because packets are cheaper
  • B.So any difference is caused by the surroundings, not different parents
  • C.So they look the same in photos
3.A kind of plant that normally grows tall is given too little water. What happens?
  • A.It changes into a different kind of plant
  • B.It grows taller than normal
  • C.It grows short and stunted
4.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
5.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
6.Hydrangea bushes of one kind have blue flowers in some soils and pink in others. What causes the difference?
  • A.The gardener's favorite color
  • B.The bushes are different kinds
  • C.The soil they grow in
7.Two cuttings from one geranium grow on a sunny windowsill and in a dark corner. Which will probably have greener, sturdier leaves?
  • A.The one in the dark corner
  • B.Both exactly the same, because they came from one plant
  • C.The one on the sunny windowsill

LessonPrint · 3-LS3-2 · Set 7 · free to copy for classroom use

Answer key — Sunflowers in Sun and Shade

Set 7. Prints on its own sheet.

  1. 1.1. Seed from one packet grew to different heights, so the sunny and shady beds changed how tall the plants grew. 2. Every plant in the sunny bed was taller than every plant in the shady bed. 3. It does not tell you how much sunlight each bed actually received. 4. The same seed packet, the same soil and the same watering.
  2. 2.So any difference is caused by the surroundings, not different parents
  3. 3.It grows short and stunted
  4. 4.Growing without light
  5. 5.Their surroundings, through their food, affect a trait
  6. 6.The soil they grow in
  7. 7.The one on the sunny windowsill

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