Science Class 7
Life Processes in Plants
How a plant builds its own food, moves it, and respires day and night.
16 lessons · ~85 min total
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Lessons in this topic
- 0 Start here A plant makes its own food, moves it, and respires day and night. · 3 min You are here
- 1 A plant makes its own food A leaf makes food from carbon dioxide, water and sunlight. · 5 min
- 2 What a leaf does with light A leaf needs sunlight, carbon dioxide, water and chlorophyll to make food. · 6 min
- 3 Where in a leaf it happens Chlorophyll catches sunlight. Stomata let gases in and out. · 5 min
- 4 Testing a leaf for starch Iodine turns blue-black where a leaf has starch. · 6 min
- 5 Checkpoint: how a plant builds its own food A quick check on food-making, leaf parts and the starch test. · 4 min
- 6 What the roots take in Roots take in water. Minerals dissolved in it come too. · 5 min
- 7 Water up, food around Xylem carries water up. Phloem carries food to every part. · 6 min
- 8 Where the food ends up The leaf makes the food. Phloem carries it to the store. · 5 min
- 9 A plant respires, day and night Photosynthesis makes food. Respiration releases the energy in it. · 7 min
- 10 Sunlight, water and growth A plant needs sunlight and water to grow well. · 6 min
- 11 Does a leaf need carbon dioxide? Take carbon dioxide away and a leaf makes no starch. · 6 min
- 12 What a leaf gives out A leaf in sunlight gives out oxygen and makes glucose. · 6 min
- 13 Red leaves can make food too Red and purple leaves can still make food, if they have chlorophyll. · 5 min
- 14 The big picture Twelve ideas on how a plant grows, feeds and respires. · 4 min
- 15 Track quiz Twelve quick questions on how a plant grows, makes and moves food. · 6 min
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