PPT-Aseel Samaro

Exploring reactions of acids with carbonates Introduction Some rocks such as limestone contain a metal carbonate limestone contains calcium carbonate Limestone reacts with acids in a predictable way and as new products are formed the limestone is eroded. 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.. 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 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.. 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.. 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.. 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 . 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. . 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 .