Skip to main content

Explore a limited selection of dorKk videos free on YouTube.

YouTube

dorKk · English lesson guide

Grade 8 Natural Science: modules and lessons

Explore Grade 8 Natural Science: 13 modules and 55 lesson entries. Use the dorKk lesson guide to plan revision and catch-up study.

dorKk provides pre-recorded CAPS-aligned video lessons for self-paced study alongside schoolwork. Choose a module below, find the lesson that matches your classwork, and use the sequence to identify gaps. This guide lists lesson titles; access to the videos depends on your subscription. dorKk is not an online school.

Source: dorKk English lesson list dated 21 January 2026. Catalogue entries may differ from current app availability.

Plan your study

  1. Choose the module you are currently studying at school.
  2. Try a textbook question first and note where you get stuck.
  3. Watch the matching lesson, try again and keep a list of questions for your teacher.

PHOTOSYNTHESIS AND RESPIRATION

  1. 1.1.PHOTOSYNTHESIS
  2. 1.2.RESPIRATION

INTERACTIONS AND INTERDEPENDENCE WITHIN THE ENVIRONMENT

  1. 2.1.INTRODUCTION TO ECOLOGY
  2. 2.2.ECOSYSTEMS
  3. 2.3.FEEDING RELATIONSHIPS
  4. 2.4.ENERGY FLOW, FOOD WEBS AND FOOD CHAINS
  5. 2.5.BALANCE IN THE ECOSYSTEM
  6. 2.6.ADAPTATION
  7. 2.7.CONSERVATION OF THE ECOSYSTEM

MICROORGANISMS

  1. 3.1.TYPES OF MICROORGANISMS
  2. 3.2.HARMFUL MICROORGANISMS
  3. 3.3.USEFUL MICROORGANISMS

PERIODIC TABLE OF ELEMENTS

  1. 4.1.ARRANGEMENT OF ELEMENTS ON THE PERIODIC TABLE
  2. 4.2.SOME PROPERTIES OF METALS, SEMIMETALS AND NONMETALS

ATOMS

  1. 5.1.ATOMS; BUILDING BLOCKS OF MATTER AND SUBATOMIC PARTICLES
  2. 5.2.PURE SUBSTANCES; ELEMENTS
  3. 5.3.PURE SUBSTANCES; COMPOUNDS
  4. 5.4.MIXTURES OF ELEMENTS AND COMPOUNDS

PARTICLE MODEL OF MATTER

  1. 6.1.THE CONCEPT OF THE PARTICLE MODEL OF MATTER
  2. 6.2.CHANGES OF STATE
  3. 6.3.DENSITY, MASS, AND VOLUME AND STATES OF MATTER
  4. 6.4.EXPANSION AND CONTRACTION OF DIFFERENT MATERIALS AND PRESSURE

CHEMICAL REACTIONS

  1. 7.1.REACTANTS AND PRODUCTS

STATIC ELECTRICITY

  1. 8.1.FRICTION AND STATIC ELECTRICITY

ENERGY TRANSFER IN ELECTRICAL SYSTEMS

  1. 9.1.CIRCUITS, CURRENT ELECTRICITY AND COMPONENTS OF AN ELECTRICAL CIRCUIT
  2. 9.2.EFFECTS OF AN ELECTRICAL CURRENT

SERIES AND PARALLEL CIRCUITS

  1. 10.1.SERIES CIRCUITS
  2. 10.2.PARALLEL CIRCUITS AND OTHER OUTPUT DEVICES

VISIBLE LIGHT

  1. 11.1.RADIATION OF LIGHT AND THE SPECTRUM OF VISIBLE LIGHT
  2. 11.2.OPAQUE AND TRANSPARENT SUBSTANCES AND ABSORPTION OF LIGHT
  3. 11.3.RADIATION OF LIGHT
  4. 11.4.THE SPECTRUM OF VISIBLE LIGHT
  5. 11.5.OPAQUE AND TRANSPARENT SUBSTANCES
  6. 11.6.ABSORPTION OF LIGHT
  7. 11.7.REFLECTION OF LIGHT
  8. 11.8.SEEING LIGHT
  9. 11.9.REFRACTION OF LIGHT PART 1
  10. 11.10.REFRACTION OF LIGHT PART 2

PLANET EARTH AND BEYOND

  1. 12.1.THE SUN
  2. 12.2.OBJECTS AROUND THE SUN (PART 1)
  3. 12.3.OBJECTS AROUND THE SUN (PART 2)
  4. 12.4.EARTH'S POSITION IN THE SOLAR SYSTEM
  5. 12.5.THE MILKY WAY GALAXY
  6. 12.6.OUR NEAREST STAR
  7. 12.7.LIGHT YEARS
  8. 12.8.BEYOND THE MILKY WAY GALAXY
  9. 12.9.EARLY VIEWING OF SPACE
  10. 12.10.TELESCOPES

REVISION

  1. 13.1.TERM 1 PART 1
  2. 13.2.TERM 1 PART 2
  3. 13.3.TERM 2 PART 1
  4. 13.4.TERM 2 PART 2
  5. 13.5.TERM 3
  6. 13.6.TERM 3 REVISION (ENERGY AND CHANGE)
  7. 13.7.TERM 4 REVISION (PLANET EARTH AND BEYOND)

Questions about access

Are the lessons live?

No. The video lessons are pre-recorded for study at your own pace.

Does dorKk replace my school?

No. dorKk supports schoolwork and revision and does not award school qualifications.

View subscription options