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    Why does it rain? Clouds, humidity, and dew point

    Why does it rain? It rains when droplets of water in the clouds grow so large that they become too heavy to stay suspended in the air due to gravity. Then the droplets fall from the clouds as rain. Rain is essentially the clouds themselves falling to the surface of Earth one heavy water droplet […] More

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    The Solar, Lunar and Jewish Calendar Systems

    The solar and lunar calendars each have their strengths. This segment from Dr. David Neiman’s series, “Cradles of Civilization” discusses the method of reconciliation between these two systems and the adjustments made to the lunar system in the Jewish calendar.

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    Phases of the Moon

    See the link above for an explanation of the different phases of the moon.

    Click here for a good diagram and explanation on how we can see a full moon if it is behind the Earth relative to the Sun.

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    What are tides? Why are there tides?

    WHAT are tides? Tides are the rise and fall of sea levels throughout the day caused by the gravitational force that the Moon exerts on the Earth. High tide is when the sea level is at its highest. Low tide is when the sea level is at its lowest. There are two high tides and […] More

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    What Is the Greenhouse Effect?

    Earth is a comfortable place for living things. It’s just the right temperatures for plants and animals – including humans – to thrive. Why is Earth so special?

    Well, one reason is: the greenhouse effect!

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    Ecosystem

    An ecosystem is a community of living organisms in conjunction with the nonliving components of their environment, interacting as a system. More

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