PPT-Aseel Samaro

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 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 . 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 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.. 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 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?. 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. 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.. 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.. 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.