PPT-Aseel Samaro

Exploring Magnets Magnets have many effects sometimes surprisingly strong They have many uses including computer hard drives loudspeakers credit card strips magnetic fasteners and compasses for navigation. Exploring gas pressure. The pressure of the atmosphere is not the same in all places – it varies with height.. High up a mountain the atmospheric pressure is much lower than at sea level.. In space there is no atmosphere and so there is no pressure.. Investigating the effectiveness of . antacids . Introduction. Heartburn indigestion is caused by acid from the stomach irritating the upper digestive . tract.. For . those who suffer regularly, treatments are available to . Understanding how seeds are dispersed by the wind . The largest seed in the world is 50 cm in . diameter.. It . comes from the palm tree called Coco de . Mer. , found only in the Seychelles islands in the Indian . Investigating chemosynthesis. Most living organisms depend on . sunlight. as their ultimate source of energy.. Green plants use sunlight to make food by . photosynthesis. .. In the darkness of the ocean depths there is no sunlight, but many organisms live there.. Exploring the movement of water and minerals in plants. Water is needed in cells to support the plant and to . photosynthesise. . Minerals in the soil dissolve in water.. How do plants get the water and minerals they need? How do they move through the plant?. Exploring the importance of minerals to plants. All plants require essential elements that are not supplied by photosynthesis – minerals that are found in soil and absorbed by the plant through its root system.. Exploring the importance of insects . Food security refers to the availability of food and the ability to obtain it. . What is the role of bees and insects in our food security?. How does agricultural practice impact on food security?. Analysing . adaptations . for respiration. They are both structures that transfer energy from type to another. .. Mitochondria provides energy for our . cells.. The power station provides energy for our homes. Understanding electrostatic field. Charged objects can affect their surroundings even when they are not in contact.. Sometimes people believe that they can ‘feel’ electricity in the air. The idea of an electrostatic field helps to explain this.. Understanding anaerobic respiration. Plants and microbes, like animals, sometimes need to respire . anaerobically.. As . in animals, this process uses glucose to release energy. .. But . the products of anaerobic respiration in plants and microbes differ from the products in animals.. Separating mixtures. If you put different objects together, such as different fruits in a bowl, toys in a box or sweets in a bag, you have a . mixture.. Simply . picking out one object separates it from the . The heart is odd one out. The heart is made from cardiac muscle. The bicep muscle (in the arm), the calf muscles ( in the legs) and the diaphragm (in the chest) are types of skeletal muscles.. Investigating muscle strength . Gemstones, such as amethyst, are crystal that formed deep in the Earth’s . crust.. Water . dissolved salts and as this solution cooled over thousands of years, the precious crystals formed.. Introduction. Jamil. . Al-twaije. r . lina. . abdullah. References . WALKER’S PEDIATRIC GASTROINTESTINAL DISEASE PATHOPHYSIOLOGY • DIAGNOSIS •. MANAGEMENT. SIXTH EDITION. Nelson:s. textbook 20.