Summary Grade 8 Natural Sciences (NS) Summaries - Term 1 (Spot On)

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, Respiration
Photosynthesis
• Energy is released from food through chemical
reactions in the body. Capturing the sun’s energy
• Respiration breaks down glucose molecules to
release energy. • All animals depend on other animals or
• Mitochondria are responsible for respiration. plants for food.
• Carbon dioxide and water are by-products. • Plants capture the sun’s energy through
• Glucose + oxygen -----> energy + carbon dioxide + photosynthesis.
water.
• The lime water test indicates the presence of M1:

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carbon dioxide by turning the lime water milky. Photosynthesis
and respiration
What is photosynthesis?



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• Chlorophyll traps radiant energy and converts it into
glucose.
• Glucose is stored as starch.
• Water and carbon dioxide (CO2) is also needed.
• Oxygen is released as a by-product.
• Photosynthesis – chemical process where a green plant
uses radiant energy from the sun together with carbon
dioxide and water to make glucose.
Chlorophyll
• Carbon dioxide + water -------------------> glucose + oxygen.
Sunlight




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GR8 NS Mind Map

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