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What Causes an Earthquake?
What Causes an Earthquake? An earthquake is caused by movements that take place beneath the Earth’s surface. The outer layer (crust) of th
Why Don’t We Feel the Earth Going Around?
Why Don’t We Feel the Earth Going Around? We cannot feel the Earth rotating because we are moving with it. For example, if we…
How Does a Cow Make Its Milk?
How Does a Cow Make Its Milk? Cow’s milk is made in a baggy organ called an udder, which hangs from the cow’s stomach.…
Where Do Tears Come From?
Tears flow from glands under the eyelid. Even though we are not aware of it, there are tears in our eyes all the time…
What Is Soil?
Soil is a mixture of very small pieces of rock and rotted materials from plants and animals. This rotting plant and animal material, called