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Cell Evidence Investigation

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Cell Evidence Investigation

A science team is sorting microscope samples. Use the sample notes to decide which samples show cells. An observation describes what is visible; an inference explains what that evidence suggests.

Evidence notes

The team recorded these notes: Plant sample—repeating box-shaped compartments with sturdy boundaries; animal sample—rounded compartments with a boundary and a darker central structure; microbial sample—many separate tiny rods with outlines; salt sample—one angular solid with straight crystal faces and no repeated compartments.

1.Using the sample notes, which three samples show evidence of cells? Name each sample and give one visible feature for each.
2.Which sample is the strongest evidence of a non-cellular object? State one observation that supports your choice.
3.True or false: The plant and animal samples look different, so they cannot both be made of cells. Explain using one observation from each sample.
4.A student says, “The tiny rods must be salt crystals because both have an outline.” What important difference in the evidence would help correct the student?
5.Which statement is an observation rather than an inference?
  • The animal sample contains rounded compartments with darker centers.
  • The sample is definitely alive.
  • The plant cells are better than animal cells.
  • The salt crystal is made of cells because it is small.
6.Complete the claim with evidence: “The microbial sample is cellular because I observe .”
7.Compare the plant and animal samples. Give one feature they share and one feature that differs.
8.A lab partner argues that a single boundary proves an object is a cell. Use the salt sample as counterevidence and explain why more than one feature may be useful.
9.Write a short evidence-based conclusion for the science team. Identify one cellular sample and the salt sample, then explain how their observed structures support different conclusions.

2 printable pages

  • Cell Evidence Investigation, page 1 of 2: Evidence notes

    Page 1

  • Cell Evidence Investigation, page 2 of 2: 5. Which statement is an observation rather than an inference?

    Page 2

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