What Is an Iceberg?
What Is an Iceberg? If a glacier reaches the sea, its forward edge breaks off, forming huge floating blocks of ice called icebergs. Icebergs are pieces of ice formed on...
Read MoreWhat Is an Iceberg? If a glacier reaches the sea, its forward edge breaks off, forming huge floating blocks of ice called icebergs. Icebergs are pieces of ice formed on...
Read MoreWhat Is Cement Made From? Cement is made from a mixture of lime, clay, silica, iron and aluminum minerals. Limestone is the most important source for the calcium, while...
Read MoreWhat Causes Earthquakes? Earthquakes happen when two large pieces of the Earth’s crust suddenly slip. This causes shock waves to shake the surface of the Earth in...
Read MoreWhat Causes an Earthquake? An earthquake is caused by movements that take place beneath the Earth’s surface. The outer layer (crust) of the Earth consists of huge...
Read MoreHow Are Mountains Formed? Mountains are created by slow movements in the earth’s crust. In some places, heat and pressure deep inside the earth slowly buckle the...
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