<p class="ql-block"><b style="color: rgb(255, 138, 0);">Content</b></p><p class="ql-block"><b style="color: rgb(255, 138, 0);">1.主题课游戏</b></p><p class="ql-block"><b style="color: rgb(255, 138, 0);">2.types of platform and water form</b></p> <p class="ql-block"><b style="color: rgb(255, 138, 0);">Supplements &Game. Types of platform and water form</b></p> <p class="ql-block"><b style="color: rgb(57, 181, 74);">Mountain</b></p><p class="ql-block">Any large landform that rises prominently above surrounding land in a limited area, in the form of a peak, can be considered a mountain. Mountains are steeper than hills and they are formed through tectonic forces or volcanic activity. Typically, the summit or peak has to be 2000 feet high to be considered a mountain.</p> <p class="ql-block"><b style="color: rgb(57, 181, 74);">Hill</b></p><p class="ql-block">A hill is a landform that extends above the surrounding terrain. It often has a distinct summit, however, a hill may also refer to a particular section of flat terrain without a massive summit.</p> <p class="ql-block"><b style="color: rgb(57, 181, 74);">Valley</b></p><p class="ql-block">Valleys are low areas that you find between mountains or hills. There is usually a river or body of water that flows through but this is not always the case. Valleys are normally longer in length than they are wide.</p> <p class="ql-block"><b style="color: rgb(57, 181, 74);">Canyon</b></p><p class="ql-block">Canyons like valleys are formed when water cuts through a mountain or hill range. However, canyons are deeper, narrower and have steeper sides. Water can be present but not all canyons have rivers or water bodies flowing through them.</p> <p class="ql-block"><b style="color: rgb(57, 181, 74);">Cliff</b> is a near vertical or extremely vertical rock exposed from the surface. The main processes through which cliffs are formed are erosion, weathering, and tectonic activity.</p> <p class="ql-block"><b style="color: rgb(57, 181, 74);">Plateau</b> is a flat, elevated landform that rises sharply above the surrounding area on at least one side. Plateaus occur on every continent and take up a third of the Earths land. </p> <p class="ql-block"><b style="color: rgb(57, 181, 74);">Cave</b>: a hallow space in the ground or mountain with an opening to enter.</p> <p class="ql-block"><b style="color: rgb(57, 181, 74);">Desert</b></p><p class="ql-block">A desert is a barren area of landscape where little rainfall/snow occurs. The living conditions are not suitable for most plant or animal life.</p><p class="ql-block">Deserts can be sandy but not always. Some deserts are large expanses of hardened earth and rocks.</p> <p class="ql-block"><b style="color: rgb(57, 181, 74);">Forest</b></p><p class="ql-block">Forests are the complete opposite of deserts. These are large areas covered in trees and other vegetation like vines and ivy plants and a variety of wildlife.</p> <p class="ql-block"><b style="color: rgb(57, 181, 74);">Jungle</b></p><p class="ql-block">Jungles are, in essence, impossible to get through. They are rainforests that are dense and tangled with thick vines and other plant life.</p> <p class="ql-block"><b style="color: rgb(57, 181, 74);">Glacier</b></p><p class="ql-block">These types of terrains are covered by large masses of ice and this body of ice constantly moves under its own weight. Most glaciers are also made up of rocks, water, and snow.</p> <p class="ql-block"><b style="color: rgb(57, 181, 74);">Marsh</b></p><p class="ql-block">Marshes are low-lying land that is flooded in wet seasons or at high tide and typically remains waterlogged most of the times.</p> <p class="ql-block"><b style="color: rgb(57, 181, 74);">Ocean</b></p><p class="ql-block">Oceans are large bodies of water that cover (70%) most of the earth’s surface. There are a total of six oceans on Earth. They are, in descending order by area, the Pacific, Atlantic, Indian, Southern, and Arctic Oceans.</p><p class="ql-block">There are over 230,000 known species of organisms that live in oceans. These include eels, crabs, octopuses, whales, and more. But oceans are largely unexplored and more and more species are being discovered.</p> <p class="ql-block"><b style="color: rgb(57, 181, 74);">River</b></p><p class="ql-block">A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake, or another river. In some cases, a river flows into the ground and becomes dry at the end of its course without reaching another body of water. </p> <p class="ql-block"><b style="color: rgb(57, 181, 74);">Island</b>: an are of land completely surrounded by water</p> <p class="ql-block"><b style="color: rgb(57, 181, 74);">lake</b>: a large body of water surrounded by land</p> <p class="ql-block"><b style="color: rgb(57, 181, 74);">Plateau</b>: flat highland area with one steep face; elevated plain.</p> <p class="ql-block"><b style="color: rgb(57, 181, 74);">Volcano</b>: a cone shaped mountain formed out of rock or ash thrown up from inside the arth, frequently with an opening or depression at the top.</p> <p class="ql-block"><b style="color: rgb(57, 181, 74);">Waterfall</b>: place where running water makes a sheer drop, usually over a cliff.</p> <p class="ql-block"><b style="color: rgb(57, 181, 74);">Bay</b>: a body of water forming an indentation of the shoreline, larger than a cove but smaller than a gulf.</p> <p class="ql-block"><b style="color: rgb(57, 181, 74);">Beach</b></p>