Science Single Award - 4SS0 PearsonEdexcel

Nutrition

Bayani Gaba-gaba

Every living thing needs energy and raw materials to survive. Plants capture sunlight and build glucose from carbon dioxide and water, while animals obtain their nutrients by eating other organisms and breaking food down in a specialised digestive system.

In this lesson you will explore photosynthesis in plants - including limiting factors and leaf adaptations - and then turn to human nutrition: the structure of the alimentary canal and the role of digestive enzymes. Both halves of this topic appear regularly in Papers 1 and 2.

Manufura

Understand the process of photosynthesis and its importance in the conversion of light energy to chemical energy
Know the word equation and the balanced chemical symbol equation for photosynthesis
Understand how varying carbon dioxide concentration, light intensity and temperature affect the rate of photosynthesis
Describe the structure of the leaf and explain how it is adapted for photosynthesis
Investigate photosynthesis, showing the evolution of oxygen from a water plant, the production of starch and the requirements of light, carbon dioxide and chlorophyll
Describe the structure and function of the human alimentary canal, including the mouth, oesophagus, stomach, small intestine (duodenum and ileum), large intestine (colon and rectum) and pancreas
Understand the role of digestive enzymes, including the digestion of starch to glucose by amylase and maltase, the digestion of proteins to amino acids by proteases and the digestion of lipids to fatty acids and glycerol by lipases

Takardar Darasi

A single oak tree produces enough glucose in a year to fill a small lorry. Meanwhile, the human digestive system processes roughly 30 tonnes of food over a lifetime. Whether an organism makes its own food or eats someone else's, nutrition is the foundation of every other life process.

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Zazzage manhajar Green Bridge CBT a wayar ka ko kwamfyuta ka don samun cikakkiyar bayanan darasi, tambayoyin aiki, da ƙari.

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Nazarin Darasi

Barka da kammala darasi akan Nutrition. Yanzu da kuka bincika mahimman raayoyi da raayoyi, lokaci yayi da zaku gwada ilimin ku. Wannan sashe yana ba da ayyuka iri-iri Tambayoyin da aka tsara don ƙarfafa fahimtar ku da kuma taimaka muku auna fahimtar ku game da kayan.

Za ka gamu da haɗe-haɗen nau'ikan tambayoyi, ciki har da tambayoyin zaɓi da yawa, tambayoyin gajeren amsa, da tambayoyin rubutu. Kowace tambaya an ƙirƙira ta da kyau don auna fannoni daban-daban na iliminka da ƙwarewar tunani mai zurfi.

Yi wannan ɓangaren na kimantawa a matsayin wata dama don ƙarfafa fahimtarka kan batun kuma don gano duk wani yanki da kake buƙatar ƙarin karatu. Kada ka yanke ƙauna da duk wani ƙalubale da ka fuskanta; maimakon haka, ka kallesu a matsayin damar haɓaka da ingantawa.

Which gas is released as a by-product of photosynthesis? A) Carbon dioxide B) Nitrogen C) Oxygen D) Hydrogen Answer: C
Which part of the leaf contains the most chloroplasts? A) Lower epidermis B) Spongy mesophyll C) Palisade mesophyll D) Waxy cuticle Answer: C
Lipase breaks down lipids into: A) Glucose and starch B) Amino acids C) Fatty acids and glycerol D) Maltose Answer: C
Where does most chemical digestion occur in the human body? A) Mouth B) Stomach C) Duodenum D) Large intestine Answer: C
At high light intensities, increasing light further does not increase the rate of photosynthesis because: A) The plant has run out of chlorophyll B) Another factor has become limiting C) The plant is respiring too fast D) Stomata have closed Answer: B