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Diffusion: moving particles

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Lesson details

Lesson outcome

Waxaan sharxi karaa in faafitaanku yahay dhaqaaqa qaybaha walax ka yimid meel xoogga (concentration) sare ku leh meel xoogga hoose ku leh.

Introduction

In this lesson: I can explain that diffusion is the movement of particles of a substance from an area of higher to lower concentration. All substances, including the cell cytoplasm and substances within it, are made up of particles. These particles move in random directions and collide all the time.

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All substances, including the cell cytoplasm and substances within it, are made up of particles. These particles move in random directions and collide all the time. Concentration is the number of particles in a volume of liquid or gas. The net movement of particles is down a concentration gradient. Diffusion is the passive movement of particles of a substance from an area of higher to lower concentration.

Worksheet

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Quizzes

  1. 1. Which of the following are **not** made of cells?

    • Fish
    • Snail
    • Lion
    • Correct answer:Rocks
    • Grass

  2. 2. Which one statement about the human body is true?

    • The body contains cells.
    • The body is a cell.
    • Correct answer:The body is made up of cells.
    • There are no cells in the body.

  3. 3. What does the word particle refer to?

    • Correct answer:atoms and molecules
    • atoms and cell organelles
    • cells and cell organelles
    • molecules and cells
    • atoms and cells

  4. 4. What is the particle model?

    • Correct answer:Describes the arrangement of particles in solids, liquid and gases.
    • Describes how particles can change.
    • Describes the arrangement of cell organelles within cells.
    • Describes how to make new particles.

  1. 1. Which of the following describe the movement of particles in liquids and gases?

    • Correct answer:Constantly moving
    • Move in one direction
    • Correct answer:Move randomly
    • Correct answer:Collide with each other
    • Stop moving when they are evenly spread out

  2. 2. Which best describes diffusion?

    • Movement of particles from an area of lower to higher concentration.
    • Correct answer:Movement of particles from an area of higher to lower concentration.
    • Movement of particles from one concentration to another.

  3. 3. Why is diffusion a passive process?

    • Requires particles to spread out.
    • Correct answer:Requires no additional energy.
    • Requires additional energy.
    • Requires particles to be in the gas state.
    • Requires particles to be in the liquid state

  4. 4. Which of the following are examples of particles that may be found in the cell cytoplasm?

    • Mitochondria
    • Nucleus
    • Correct answer:Oxygen
    • Correct answer:Glucose
    • Chloroplasts

What pupils see

The same lesson as a pupil sees it. You can set any section as work on its own.

  • IntroductionPrepare
  • Starter quizActivate · 4 questions
  • Lesson videoLearn
  • Exit quizCheck · 4 questions
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