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Life Science Inquiry Basics

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Life Science Inquiry Basics

Read each scenario carefully. Use evidence from the data when asked. A hypothesis is a testable prediction, and a fair test changes one factor while keeping other conditions the same.

Living things and science questions

Use what you know about organisms and how scientists investigate questions.

1.A class finds a tiny worm beneath a damp leaf. Which observation is the strongest evidence that the worm is a living thing?
  • It can grow and respond to its surroundings.
  • It is small.
  • It is the same color as the soil.
  • It is found outdoors.
2.Sort these examples in your mind: a mushroom, a pebble, a pine tree, and a cloud. Name the living things and explain what makes them living.
3.Lena wonders, “Do bean seedlings grow taller with more hours of light?” Which statement is a testable hypothesis for her investigation?
  • Plants are interesting.
  • If bean seedlings receive more hours of light, then they will grow taller over two weeks.
  • Light is bright.
  • Bean seedlings are the best plants.
4.Lena uses the same kind of bean seed, pot, soil, and amount of water for every seedling. What is the one factor she should change to test her question?

Read the evidence

Lena measured the seedlings after two weeks. Each group began at the same height and had the same water, soil, and seed type.

Hours of light each day

Average seedling height

2 hours

5 cm

6 hours

9 cm

10 hours

12 cm

5.According to Lena’s data, which group had the tallest seedlings after two weeks?
6.Describe the pattern in the data as the hours of light increase. Use at least two measurements as evidence.
7.Does this investigation prove that more light always makes every plant grow taller? Explain why or why not.

Make the investigation stronger

Think about how scientists make results more dependable and share what they learn.

8.Why should Lena grow several seedlings in each light group instead of relying on just one seedling?
9.Lena shares her method and results with other scientists. Give one reason sharing scientific results is useful.

3 printable pages

  • Life Science Inquiry Basics, page 1 of 3: Living things and science questions

    Page 1

  • Life Science Inquiry Basics, page 2 of 3: Read the evidence, Make the investigation stronger

    Page 2

  • Life Science Inquiry Basics, page 3 of 3: 9. Lena shares her method and results with other scientists. Give one reason sharing…

    Page 3

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