PPT-Aseel Samaro

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. 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. 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.. 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?. Calculating pressure. Calculating pressure is important to engineers.. For example, the foundations of a building have to carry the full downwards force of its weight.. There have been cases of buildings collapsing when the pressure on the foundations was too large.. Knowing how pollination leads to . fertilisation. . It is a pollen grain from a sunflower.. Pollen comes in a variety of shapes and sizes. The variety means that you might be allergic to one type but not another.. 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.. Using Indicators . The traffic indicators on a car tell other vehicles when the car is going to . turn.. Indicators . in science can show us whether a substance is an acid or an . alkali.. Nature . is full of natural indicators and we can make use of these indicators in many ways.. 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.. 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. . Transmission Basics - Aseel AlHadlaq. Data vs Signal. Data – information formatted in human/machine readable form . examples: voice, music, image, file . Signal – electric or electromagnetic representation of data .