Science - Grade 3- Lesson 2: What Landforms Are on the Earth's Surface?
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What is a landform?
A landform is a shape on the earth's surface.
What are the three (3) most important landforms?
The three (3) most important landforms are mountains, plains, and plateaus.
How are land forms formed?
Landforms are shaped by natural forces. Natural forces on the earth's surface that shape the land are water, wind, or ice (glaciers). Movement of magma or movements of the earth's plates are also natural forces that shape the land but come from within the earth.
What is a mountain?
A mountain is a landform that is high. They were built by pushing forces over millions of years.
What are the two (2) main mountain ranges?
The two (2) main mountain ranges - Rocky Mountains in the west and the Appalachian Mountains in the east;
What is a plain?
A plain is a large, flat of land. The Great Plains are in the center of our country.
Why might people live on plains?
People might live on plains to grow crops and build farms.
What is a plateau?
A plateau is a large, flat area of land that is high, it is generally higher that the land around it; and some plateaus lie between mountain ranges.
What are the two (2) main plateaus in the United States?
The two (2) main plateaus in the United States are the Colorado Plateau and the Ozark Plateau.
What us a valley?
A valley is a low area between mountains or hills.
Why might people live in valleys?
People might live in valleys to grow crops and be in cooler air.
What is a bay?
A bay is a part of an ocean or lake. The shore O's a bay goes in toward the land.
What is a cliff?
A cliff is a very stiff wall of rock or soil.
What is an ocean?
An ocean is all the salt water that covers most if the earth's surface. There are five (5) oceans in the world: Atlantic Ocean, Pacific Ocean, Indian Ocean, Southern Ocean, and the Article Ocean.
What is a river?
A river is a stream of water. The moving water in a river usually flows toward a lake or ocean.
What is a lake?
A lake is a large body of water that is surrounded by land. A lake is larger than a pond.
How are rivers and lakes alike?
How are rivers and lakes different?
Why are communities near water?
Communities form near water because water is necessary for life. You can also have fun swimming, fishing, and boating.
What is a hill?
A hill is a high place on the earth's surface. Hills have rounded tops. They are smaller than--and not as tall as--mountains.
What is a glacier?
A glacier is a huge area of moving ice. Glaciers form in high mountains and in other cold parts of the world. They also form near the north and south poles. Glaciers move very slowly down a mountain. Glaciers shape the land beneath them.
What is a coast?
A coast is a place where the land meets the ocean. Some coasts are sandy beaches while others are rocky cliffs. Wind and moving water are always changing coasts.
What are coasts changed by?
Coasts are always being changed by wind and moving water.
What is a Barrier Island?
A Barrier Island is a long narrow island near the coast, built up by the action of waves.
What is a canyon?
A canyon is a narrow valley with steep cliff walls, cut into the earth by running water.
What is a dune?
A dune is a rounded hill or ridge of sand that has been heaped up by the wind.
What is a flood?
A flood is an overflow of water onto a region (area) of land.
What is erosion?
Erosion is the way wind and water wear away the land bit by bit.