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Summary Grade 8 Natural Sciences (NS) Summaries - Term 1 (Via Afrika) R120,00
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Summary Grade 8 Natural Sciences (NS) Summaries - Term 1 (Via Afrika)
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Grade 8 Natural Sciences (NS) Summaries - Term 1 (Via Afrika): These summaries are compiled using the Via Afrika textbook's Term 1 content. The summaries are in English, with additional notes provided by the compiler. Strand 1:  Life and living Topic 1:  Photosynthesis and respiration Topi...

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  • January 8, 2025
  • 28
  • 2024/2025
  • Summary

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  • grade 8 ns summaries term 1

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Sample
Summaries after sample

,Sample
Summaries after sample

, Energy flow: food chains
Balance in an ecosystem and food webs Food chains
An ecosystem needs to Plants and algae • Biotic and abiotic factors interact to
maintain stability.
be in balance • Capture sunlight energy through • Energy is passed from plants to animals in
photosynthesis. the food chain.
• Everything in ecosystems is interdependent.
• Natural factors that disrupt the balance in •
ecosystems = drought, floods and sudden
temperature changes.
• Human factors that disrupt the balance in
Decomposers
ecosystems = removing organisms from • Decomposers break down the bodies of plants


Sample
ecosystems, destroying natural habitats and
pollution. T2: Interactions
and
interdependence
and animals - releases decayed material back to
the soil.
• Green plants use this material to produce food.
• Decomposers release energy.
• Food chains depict energy flow through the
within the ecosystem, arranged in a specific order.


Summaries after sample environment (B) •


Trophic levels
• Food chains are also represented using energy
pyramids - indicate the energy availability from
each group of organisms in an ecosystem.
• Each group forms a trophic level.
Food webs • Less energy reaches higher levels in the pyramid.
• Shows a series of food chains in an •
ecosystem.
• Producers are at the bottom, herbivores
are in the second row, and carnivores Energy transfer and energy loss
are on top.
• Organisms use 90% of their food to live and grow.
•
• 10% is stored in their bodies.
•


T1-T2 Via Afrika Copyright © www.summariessa.co.za (DO NOT COPY)
GR8

NS Mind Map

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