How Are Stars Formed?
A star like our sun is born inside a huge cloud of gas and dust. A globe of space matter grows as it sweeps up surrounding matter by gravitational attraction. As the...
Read MoreA star like our sun is born inside a huge cloud of gas and dust. A globe of space matter grows as it sweeps up surrounding matter by gravitational attraction. As the...
Read MoreWhat Causes Rain? You know that rain falls from clouds. Water is constantly evaporated from the earth’s surface by the warmth of the sun. The invisible water...
Read MoreWhat Causes Lightning? Lightning is an electric current. During a thunderstorm, water droplets in the clouds become charged with electricity as they are bounced about...
Read MoreWhy Does an Octopus Squirt Ink into the Water? An octopus squirts its inky liquid into the water to escape enemies. The “ink” is a thick brown fluid...
Read MoreFog is a cloud that forms near the ground. Fog appears when the cold ground chills a warm breeze. The sudden cooling causes the moisture in the air to condense, or form...
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