Acid rain Priit Norak, 11A Acid rain is rain that has a higher than normal acid level. Causes of acid rain Power plants Exhaust from cars Burning oil or natural gas Volcanic eruptions Intense lighting How? Effects of acid rain Heart and lung problems Polluted water Dead fish and animals Destroyed forests Steel corrosioin Stone erosion How to reduce acid rain? Reduce CO2 emission from cars Use electric cars Use alternative energy sources Reduce the ammount of energy we use Public transport Spread knowledge! Let’s keep our Earth healthy!
TSUNAMI Kristjan Sillaots G1R2 WHAT IS TSUNAMI? A tsunami is a series of ocean waves that sends surges of water, sometimes reaching heights of over 100 feet (30.5 meters), onto land. These walls of water can cause widespread destruction when they crash ashore. WHAT CAUSES A TSUNAMI? These awe-inspiring waves are typically caused by large, undersea earthquakes at tectonic plate boundaries. When the ocean floor at a plate boundary rises or falls suddenly, it displaces the water above it and launches the rolling waves that will become a tsunami. WHAT CAUSES A TSUNAMI? Tsunamis may also be caused by underwater landslides or volcanic eruptions. They may even be launched, as they frequently were in Earth’s ancient past, by the impact of a large meteorite plunging into an ocean. ...
Air pollution Every day, the average person inhales about 20,000 liters of air. Every time we breathe, we risk inhaling dangerous chemicals that have found their way into the air. Air pollution includes all contaminants found in the atmosphere. These dangerous substances can be either in the form of gases or particles. Air pollution can be found both outdoors and indoors. Pollutants can be trapped inside buildings, causing indoor pollution that lasts for a long time. The sources of air pollution are both natural and human-based. As one might expect, humans have been producing increasing amounts of pollution as time has progressed, and they now account for the majority of pollutants released into the air. Air pollution has been a problem throughout history. Even in Ancient Romepeople complained about smoke put into the atmosphere. The effects of air pollution are diverse and numerous. Air...
Introduction... I read a book abput the Galapagos islands writen by Paul D. Steward. I have devided my presentation in 3 paragraphs: Firstly i will tal about the origins of the islands and the history, secondly about life on the land and in the sea, finaly about conserving the Galapagos. The Galapagos Islands are situated on junctions between several shifting tectonic plates on the equator and about 1000 km off the Pacific coast of Ecuador. They are the product of one of the most volcanically active regions on our planet, a hot spot is situated directly beneath the islands and also It is the point where major ocean currents meet. These circumstances combine to make an area that truly is like no other place on earth. Galapagos is comprised of 13 major islands, more than 120 smaller islets and rocks, and the surrounding ocean. The total land mass is almost 8,000 sq. km. Highest peak is Wolf Volcano reaching 1707m. The present islands ar...
Malestrom Major Rivers N am e Continent Out fl o w T o tal Lengt h (mi.) Nile Africa Mediterran ean Sea 4,1 60 Am azo n South Am erica Atlantic Oce an 4,000 Ch ang (Yangtze) Asia East China Sea 3,964 M ississippi-M iss o u ri N o rt h Am eri ca Gul f of Mexico 3,710 Major Deserts Name ...
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