1
											
							Is an opening in the earth’s crust through which lava, volcanic ash, and gases escape. 
						
					
								
					2
											
							Any area of land smaller than a continent and entirely surrounded by water. They  may be classified as either continental or oceanic.
						
					
								
					3
											
							Is a narrow, deep valley cut by a river through rock. They may be thousands of feet deep. Smaller valleys of similar appearance are called gorges.
						
					
								
					4
											
							Is a landform that rises prominently above its surroundings, generally exhibiting steep slopes, a relatively confined summit area, and considerable local relief.
						
					
								
					5
											
							Is a natural stream of water that flows from its source until its mouth, where it flows into another lake or the sea.
						
					
								
					6
											
							Is a thick tropical forest. Is full of life: birds, insects, reptiles, monkeys, and often gorillas and other animals. They're dangerous places.
						
					
								
					7
											
							Is a extremely dry area of land with sparse vegetation. This enviroments are so dry that they support only extremely sparse vegetation