Designed for the new specification IGCSE Edexcel course but can be used for other examination boards.
Covers:
(e) Nutrition
Flowering plants
2.18 understand the process of photosynthesis and its importance in the conversion of light energy to chemical energy
2.19 know the word equation and the balanced chemical symbol equation for photosynthesis
2.20 understand how varying carbon dioxide concentration, light intensity and temperature affect the rate of photosynthesis
2.21 describe the structure of the leaf and explain how it is adapted for photosynthesis
2.22 understand that plants require mineral ions for growth, and that magnesium ions are needed for chlorophyll and nitrate ions are needed for amino acids
2.23 practical: investigate photosynthesis, showing the evolution of oxygen from a water plant, the production of starch and the requirements of light, carbon dioxide and chlorophyll
Designed for the new specification IGCSE Edexcel course but can be used for other examination boards.
Covers:
(d) Cloning
5.17B describe the process of micropropagation (tissue culture) in which explants are grown in vitro
5.18B understand how micropropagation can be used to produce commercial quantities of genetically identical plants with desirable characteristics
5.19B describe the stages in the production of cloned mammals involving the introduction of a diploid nucleus from a mature cell into an enucleated egg cell, illustrated by Dolly the sheep
5.20B understand how cloned transgenic animals can be used to produce human proteins
Designed for the new specification IGCSE Edexcel course but can be used for other examination boards.
Covers:
(b) Feeding relationships
4.6 understand the names given to different trophic levels, including producers, primary, secondary and tertiary consumers and decomposers
4.7 understand the concepts of food chains, food webs, pyramids of number, pyramids of biomass and pyramids of energy transfer
4.8 understand the transfer of substances and energy along a food chain
4.9 understand why only about 10% of energy is transferred from one trophic level to the next
Designed for the new specification IGCSE edexcel course but can be used for other examination boards.
Covers:
Humans
3.8 understand how the structure of the male and female reproductive systems are adapted for their functions
3.9 understand the roles of oestrogen and progesterone in the menstrual cycle
3.10B understand the roles of FSH and LH in the menstrual cycle
3.11 describe the role of the placenta in the nutrition of the developing embryo
3.12 understand how the developing embryo is protected by amniotic fluid
3.13 understand the roles of oestrogen and testosterone in the development of secondary sexual characteristics
Designed for the new specification AQA GCSE( covers spec point 4.7.2 ) course but can be modified for other exam boards.
11 slides covering Impact of environmental change:
4.7.2.4 Impact of environmental change (biology only) (HT only)
Designed for the new specification AQA GCSE course but can be modified for other exam boards.
27 slides covering Monoclonal antibodies
By the end of the powerpoint students would have covered:
4.3.2.1 Producing monoclonal antibodies
4.3.2.2 Uses of monoclonal antibodies
Designed for the new specification AQA GCSE course but can be modified for other exam boards.
17 slides covering Metabolism.
By the end of the powerpoint students would have covered:
4.4.2.3 Metabolism
Students should be able to explain the importance of sugars, amino acids, fatty acids and glycerol in the synthesis and breakdown of carbohydrates, proteins and lipids.
Metabolism is the sum of all the reactions in a cell or the body.
The energy transferred by respiration in cells is used by the organism for the continual enzyme controlled processes of metabolism that synthesise new molecules.
Metabolism includes:
conversion of glucose to starch, glycogen and cellulose
the formation of lipid molecules from a molecule of glycerol and three molecules of fatty acids
the use of glucose and nitrate ions to form amino acids which in turn are used to synthesise proteins
respiration
breakdown of excess proteins to form urea for excretion.
Designed for the new specification AQA GCSE course but can be modified for other exam boards.
21 slides covering Homeostasis
By the end of the powerpoint students would have covered:
4.5.1 Homeostasis
Students should be able to explain that homeostasis is the regulation of the internal conditions of a cell or organism to maintain optimum conditions for function in response to internal and external changes.
Homeostasis maintains optimal conditions for enzyme action and all cell functions.
In the human body, these include control of:
• blood glucose concentration
• body temperature
• water levels.
These automatic control systems may involve nervous responses or chemical responses.
All control systems include:
• cells called receptors, which detect stimuli (changes in the environment)
• coordination centres (such as the brain, spinal cord and pancreas) that receive and process information from receptors
• effectors, muscles or glands, which bring about responses which restore optimum levels.
Designed for the new specification AQA GCSE course but can be modified for other exam boards.
21 slides covering The nervous system
By the end of the powerpoint students would have covered:
4.5.2.1 Structure and function
Students should be able to explain how the structure of the nervous system is adapted to its functions.
The nervous system enables humans to react to their surroundings and to coordinate their behaviour.
Information from receptors passes along cells (neurones) as electrical impulses to the central nervous system (CNS). The CNS is the brain and spinal cord. The CNS coordinates the response of effectors which may be muscles contracting or glands secreting hormones.
stimulus --> receptor --> coordinator -->effector -->response
Students should be able to explain how the various structures in a reflex arc – including the sensory neurone, synapse, relay neurone and motor neurone – relate to their function. Students should understand why reflex actions are important.
Reflex actions are automatic and rapid; they do not involve the conscious part of the brain.
Required practical activity 7: plan and carry out an investigation into the effect of a factor on human reaction time.
Designed for the new specification IGCSE Edexcel course but can be used for other examination boards.
Covers:
a) Food production
Fish farming
5.9B understand the methods used to farm large numbers of fish to provide a source of protein, including maintaining water quality, controlling intraspecific and interspecific predation, controlling disease, removing waste products, controlling the quality and frequency of feeding, and selective breeding
Designed for the new specification IGCSE Edexcel course but can be used for other examination boards.
Covers:
(a) Food production
Crop plants
5.1 describe how glasshouses and polythene tunnels can be used to increase the yield of certain crops
5.2 understand the effects on crop yield of increased carbon dioxide and increased temperature in glasshouses
5.3 understand how the use of fertiliser can increase crop yield
5.4 understand the reasons for pest control and the advantages and disadvantages of using pesticides and biological control with crop plants
Designed for the new specification International A-level edexcel course but can be modified for other exam boards.
22 slides covering Lipids
By the end of the powerpoint students would have covered:
State the importance of lipids.
Describe the structure of Triglycerides.
Describe the differences between saturated and unsaturated fatty acids.
Includes two practical/demo activities
Designed for the new specification AQA GCSE course but can be modified for other exam boards.
29 slides covering Inheritance:
By the end of the powerpoint students would have covered:
4.6.1.6 Genetic inheritance
4.6.1.7 Inherited disorders
4.6.1.8 Sex determination
Designed for the new specification International A-level edexcel course but can be modified for other exam boards.
37 slides covering Proteins
By the end of the powerpoint students would have covered:
Know the structure of protein.
Describe how polypeptides are made.
Describe the primary, secondary, tertiary and quaternary structure and function of proteins.
Know the structure of a globular protein and a fibrous protein and understand how their structures relate to their functions.
Use a semi-quantitative method to estimate protein concentration using biuret reagent and colour standards.
Includes practical details and a task using molecular models.
Designed for the new specification AQA GCSE course but can be modified for other exam boards.
32 slides covering Diffusion. (contains a optional practical)
By the end of the powerpoint students would have covered:
Substances may move into and out of cells across the cell membranes via diffusion.
Diffusion is the spreading out of the particles of any substance in solution, or particles of a gas, resulting in a net movement from an area of higher concentration to an area of lower concentration.
Some of the substances transported in and out of cells by diffusion are oxygen and carbon dioxide in gas exchange, and of the waste product urea from cells into the blood plasma for excretion in the kidney.
Students should be able to explain how different factors affect the rate of diffusion.
Factors which affect the rate of diffusion are:
the difference in concentrations (concentration gradient)
the temperature
the surface area of the membrane.
A single-celled organism has a relatively large surface area to volume ratio. This allows sufficient transport of molecules into and out of the cell to meet the needs of the organism.
Students should be able to calculate and compare surface area to volume ratios.
Students should be able to explain the need for exchange surfaces and a transport system in multicellular organisms in terms of surface area to volume ratio.
Students should be able to explain how the small intestine and lungs in mammals, gills in fish, and the roots and leaves in plants, are adapted for exchanging materials.
In multicellular organisms, surfaces and organ systems are specialised for exchanging materials. This is to allow sufficient molecules tobe transported into and out of cells for the organism’s needs. The effectiveness of an exchange surface is increased by:
having a large surface area
a membrane that is thin, to provide a short diffusion path
(in animals) having an efficient blood supply
(in animals, for gaseous exchange) being ventilated.
Designed for the new specification AQA GCSE course but can be modified for other exam boards.
22 slides covering Microscopy:
By the end of the powerpoint students would have covered (includes a required practical):
Students should be able to:
understand how microscopy techniques have developed over time
explain how electron microscopy has increased understanding of sub-cellular structures.
Limited to the differences in magnification and resolution.
An electron microscope has much higher magnification and resolving power than a light microscope. This means that it can be used to study cells in much finer detail. This has enabled biologists to see and understand many more sub-cellular structures.
Students should be able to carry out calculations involving magnification, real size and image size using the formula:
magnification = size of image
size of real object
Students should be able to express answers in standard form if appropriate.
Required practical activity 1: use a light microscope to observe, draw and label a selection of plant and animal cells. A magnification scale must be included.
Check out my other resources at www.tes.com/teaching-resources/shop/mr_science
Designed for the new specification AQA GCSE course (covers spec point 4.1.1.3) but can be modified for other exam boards.
13 slides covering Plant specialisation.
By the end of the powerpoint students would have covered:
-Describe how specialised cells in a plant carry out a particular function
-Identify different parts of specialised plant cells and relate these identified parts to their function.
Check out my other resources at: www.tes.com/teaching-resources/shop/mr_science
7 practice exam questions suitable for the new GCSE AQA specification.
Great revision tool or could be used as a end of topic test.