PPT-Aseel Samaro

Explaining static charge In ancient Greece people started to put forward ideas about atoms They thought that atoms were the most basic particles and that they could not be split further It was not until the 1800s that ideas really developed beyond this. Examining interacting muscles . There are commonly three things judges look for:. Symmetry . of the . muscles (how similar they are). Muscularity (how big they are). Level . of . conditioning (how toned they are. 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 . Understanding . challenges . facing pollinators . It a scanning electron micrograph (SEM) of a pollen basket of a worker honey bee. Worker bees go from flower to flower collecting nectar and pollen to feed the colony. 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.. Changing . Physical state. When you make ice or melt the frost from a windscreen, you are making use of changes of . state.. What . is actually happening to the particles in these processes?. Introduction. 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 . Exploring the role of stomata. Plants are found in a huge range of habitats.. In order to . photosynthesise. , plants need a supply of carbon dioxide.. How do plants get carbon dioxide? Why does oxygen, a product of photosynthesis, not build up in the leaf?. Explaining floating and sinking. The Greek physicist, mathematician and inventor Archimedes had ideas that help us to understand floating, sinking and buoyancy.. Even though he lived more than 2000 years ago his principles are still used today.. Understanding . distillation. Distillation is used in making perfumes, fuels (such as petrol) and alcoholic drinks (such as vodka. ).. It . is an important separation process involving heating and cooling.. 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. Symbols and simple diagrams can accurately represent an object, message or procedure, without requiring the skills of an artist.. Introduction. It is important to be able to represent how an . experiment.