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Grade 8 · Science · Unit 1 of 8

Cells & Life Processes

Organelles, photosynthesis and respiration

What your child practises

The cell theory, what organelles do in plant and animal cells, how photosynthesis and respiration are connected, osmosis, and how cells form tissues, organs and organ systems.

Nova Scotia Curriculum learning outcome: Healthy Cells, Healthy Systems · cells, and how they make up living things

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 is the correct order from smallest to largest?

    • organ → cell → tissue → organ system
    • tissue → cell → organ system → organ
    • cell → tissue → organ → organ system
    • organ system → organ → tissue → cell

  2. Question 2

    How are photosynthesis and cellular respiration related?

    • They happen only at night.
    • They are the same process.
    • They happen only in animals.
    • The products of one are the inputs of the other.

  3. Question 3

    What does the cell membrane do?

    • Gives plant cells their green colour
    • Stores the cell's DNA
    • Makes sugar from sunlight
    • Controls what enters and leaves the cell

  4. Question 4

    Where does photosynthesis happen in a plant cell?

    • chloroplasts
    • ribosomes
    • mitochondria
    • nucleus

  5. Question 5

    What are the inputs of photosynthesis?

    • oxygen and sugar
    • oxygen and water
    • sugar and light
    • carbon dioxide, water and light energy

  6. Question 6

    Which organelle controls the cell's activities and holds its DNA?

    • cell wall
    • vacuole
    • mitochondrion
    • nucleus

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