PPT-Aseel Samaro

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. 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.. 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 . 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.. 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 . 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.. 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.. 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.