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Grade 8 · Science · Unit 8 of 16

Cells, Tissues & Organs

Single cells, specialized cells, diffusion and osmosis

What your child practises

Why cells are the basic unit of life, how plant and animal cells differ, how materials move into and out of cells, and how cells form tissues, organs and systems. Includes working out microscope magnification.

Nunavut Curriculum approved guide: Nunavut adaptation of Alberta Science 7–9 (2003), Unit B: Cells and Systems · the role of cells, single-celled and multicelled organisms, plant and animal cells, diffusion and osmosis, and cells, tissues and organs

Sample questions

A taste of this unit. In the app, questions change every time and get easier or harder to match your child.

  1. Question 1

    Which of these shows how living things are organized, from small to large?

    • organ, cell, tissue, organism, organ system
    • tissue, cell, organism, organ, organ system
    • organism, organ system, cell, tissue, organ
    • cell, tissue, organ, organ system, organism

  2. Question 2

    Which part of a plant cell captures light energy for making food?

    • cell wall
    • nucleus
    • chloroplast
    • vacuole

  3. Question 3

    A slice of celery placed in salty water goes limp. What is the best explanation?

    • Salt moves out of the cells.
    • Water moves out of the cells by osmosis.
    • The cells split in two.
    • The celery makes more water.

  4. Question 4

    Osmosis is the movement of which material through a cell membrane?

    • salt
    • sugar
    • water
    • oxygen only

  5. Question 5

    Which cells carry oxygen around the body?

    • bone cells
    • nerve cells
    • red blood cells
    • skin cells

  6. Question 6

    Which of these is a single-celled organism?

    • a poplar tree
    • a goldfish
    • a grizzly bear
    • an amoeba

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