(I) Although often referred to as tidal waves, a tsunami is not a usual wave which is only much bigger. (II) People unaware of the danger may remain at the shore for collecting fish from the exposed seabed. (III) Instead it is an endlessly onrushing tide that forces its way through any obstacle. (IV) Most of the damage is caused by the huge mass of water behind the initial wave front. (V) The sheer weight of water is enough to pulverize objects in its path, often reducing buildings to their foundations. I II III IV V
(I) Like many insects, ants have six legs. (II) An ant colony consists of the queen ant, workers, soldiers and males. (III) They are very strong so they can run very quickly. (IV) If a man could run as fast for his size as an ant can, he could run as fast as a racehorse. (V) Although many ants are tiny and only three millimeters long they can lift 20 times their own body weight. I II III IV V
(I) Rainforests are extremely important in the ecology of the Earth. (II) They cover about 7% of the Earth's surface and are havens for millions of plants and animals. (III) The plants of the rainforests generate much of the Earth's oxygen and remove carbon dioxide from the atmosphere. (IV) There are many types of tropical rainforests in the world. (V) However these plants are also very important to people in other ways; many are used in new drugs that fight disease and illness. I II III IV V
Comments