SMART Materials A SMART material is a material that is affected by outside influence. Polymorph * Type of thermoplastic (can be reshaped many times). * Normally supplied in form of granules or small plastic beads. * Low fusing temperature of around 60°C. This means it can be reduced to a mouldable condition by immersion in hot water. * Once fused turns from opaque to clear. * Heating above 65°C is dangerous as it will become a sticky-adherent mass‚ similar to hot-melt glue
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A healthy diet contains the right balance of the different foods you need and the right amount of energy Carbohydrates and fats are needed to provide energy for your body chemistry to function correctly and to keep you warm at 37oC. Proteins are used by the body to build cells - growth of new tissue‚ cell repair and cell replacement. Mineral ions and vitamins are needed in small amounts for healthy functioning of the body - organs‚ skin‚ bones etc. Fibre keeps everything moving smoothly
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ASBiology and Disease * Causes of disease * Pathogens Disease suggests a malfunction of the body or mind which has an adverse effect on good health For a micro-organism to be considered a pathogen it must * Gain entry to the host * Colonise the tissue of the host * Resist the defences of the host * Cause damage to the host tissues Pathogen Infection Disease Entry pathways * Gas exchange system * Digestive system Natural defences * Mucous layer
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AQA GCSE Revision Topics B1a Human Biology MULTIPLE CHOICE QUESTION PAPER B1a. 1. Co-ordination and control p24 Responding to change Nervous system - neurones Hormones – glands Notes understand p26 Reflex action Reflex arc pathway synapse p28 Menstrual cycle FSH‚ oestrogen‚ LH‚ ovulation p30 Artificial control of fertility Contraceptive pill IVF treatment p32 Controlling conditions Water & ions – kidneys Temperature Blood glucose – insulin
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QUESTIONS AND ANSWERS SECTION A: SIMILARITIES‚ DIFFERENCES‚ AND DEFINITIONS Gametes are mature haploid reproductive cells that unite to form a zygote that develops into a new individual. Gametes are also called sex cells. An egg or ovum is a haploid female reproductive cell or gamete whereas a sperm is a male haploid reproductive cell. A zygote is the initial cell that is formed as a result of the union of a male and a female gamete by means of sexual reproduction. The two haploid cells merge
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1 (a) In this apparatus hydrochloric acid is decomposed by passing a direct electric current through it. Chlorine and hydrogen are formed. (i) Give the name of this process in which substances‚ such as hydrochloric acid‚ are decomposed by a direct electric current. (1) electrolysis (ii) Describe what happens when a burning splint is applied to a mixture of hydrogen and air in a test tube. (2) (b) (i) Complete the sentence by putting a cross ( ) in the box next to your answer. An acid
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Year 10 Revision guide A292 Business and People 1. Explain two reasons why businesses exist - use relevant examples to illustrate your answer. Businesses exist because without them many people would be unemployed because businesses supply many people with jobs‚ this is crucial because it gives money to the workers and enables the workers to pay for there family’s. Businesses exist because create products that are needed in daily life for example “Dell” creates laptops and desktops
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BIOLOGY NOTES. UNIT 1: Photosynthesis Photosynthesis Word Equation: Light Carbon Dioxide + Water Oxygen + Glucose Chlorophyll How to test a leaf for starch: 1. Dip leaf boiling water for about 1 minute to soften it‚ stop further chemical changes and make the cell more permeable. 2. Turn off Bunsen burner. Put the leaf into the
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Tick (v) if it is a true statement. Chapter 2 Cell Structure and Cell Organisation 1. The cell is the basic unit of life for all organisms. 2. All cells have the same shape and size. 3. All cells have a plasma membrane‚ nucleus and cytoplasm. 4. Protoplasm consists of a plasma membrane and nucleus. 5. The nucleus consists of chromosomes and a nucleolus. 6. Organelles that are found in the cytoplasm of a cell include the nucleus‚ vacuole‚ endoplasmic reticulum‚ mitochondria and Golgi apparatus.
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Grinning faces greeted me as I entered the room‚ “We did it!”‚ exclaimed Aidan and Harry. After a semester of tutoring two ‘failing’ students at a local school‚ it was fantastic feeling knowing they had passed their GCSE Math. They had surpassed their expectations and it was humbling to know that my two hours each week with them had played a small part in their success. Due to class sizes of up to fifty‚ students would switch off and consequently slip behind in their math lessons. I aimed to make
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