Practice Assignment 36 | Class 7 BBC Compacta Solutions PDF Download

(1) When our earth was covered with water, all creatures to swim in it. When the sea water subsided and land appeared, the sea creatures crawled out and learnt breathing and walking land. When there were not enough plants left to eat, they learnt to hunt and kill for food. Things are still changing and you want to survive, you have to change too.

(2) All soil made up of air, water, numerous kinds living and dead organisms mineral matter. In the urban arena, includes many manmade materials. The amount each of these soil components varies one place to in the world or from one kind of soil another.

(3) We need get rid of plastic bags from lives. For the past years, there has a rising awareness about the use plastic bags in whole world. Some governments Bangladesh, Bhutan and Zanzibar decided to ban them.

(4) Global warming means the gradual increase the average temperature on Earth to the increasing amount greenhouse gases in the atmosphere. As the earth getting hotter, disasters hurricanes droughts floods occur more often. Over last 100 years, the average temperature of the air near the Earth's surface has risen a little less 1°C.

(5) The rate at we are using freshwater for our daily use greater than the one at which nature replaces water the ecosystem. If this continues, then will be several places on Earth which will deprived of sufficient water supply. So, water conservation be practised extensively.

(6) Elephant festival a unique event held annually in Jaipur, capital of Rajasthan. It become a major draw tourists. Glittering in gold, elephants catwalk before enthralled audience, move gracefully in procession and play the regal game polo.

(7) Disappearing ice could devastating for wildlife many ways. As the ice melts, water drains the oceans, diluting them and making less salty. That, along warmer water temperatures, can harm the creatures live in, under and near the ice.

(8) As winter sets, many birds leave their breeding grounds fly long distances to warmer places. Here it is easier them to find enough food. As spring comes they back their homes. This amazing annual journey called migration.

(9) Leopards are famous their ability to go undetected. They walk among humans and still be tough spot. Amongst the big cats are probably the accomplished stalkers. They are good and glide climbers can descend from a tree headfirst. They swimmers also but not as fond of water tigers.

(10) Since beginning, trees have furnished us with two life's essentials – food and oxygen. As we evolved, provided us additional necessities such shelter, medicine and tools. Today trees an important part every community.