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  • Bill Nye, the Science Guy: Air Keeps Us Warm

    lapse rate
    atmospheric temperature
    atmosphere
    Bill Nye explains why it gets colder as one travels up through the atmosphere. He uses miniature replicas of a city and a mountain to support his explanation. Bill also briefly touches upon the lapse rate.

  • Bill Nye, the Science Guy: Volcanoes

    volcanoes
    Bill Nye explains what volcanoes are, how they're formed, and what causes an eruption. He then explains the impact of volcanoes on the earth's geography.

  • Bill Nye, the Science Guy: Plate Tectonics

    plate tectonics
    Bill Nye explains plate tectonics and the origination of its theory. The areas in which the tectonics spread apart is where volcanoes form. Conversely, the areas in which the tectonics come together is where mountains form.

  • Bill Nye, the Science Guy: Wind

    wind
    Bill Nye explains that wind is caused by the heating and the cooling of the Earth. The Sun warms the air, causing it to move faster and spread out, and cold air pushes the warm air up. Wind comes from all different directions since it moves with the rotation of the Earth.

  • Bill Nye, the Science Guy: Ocean Currents

    ocean currents
    Bill Nye explains that thermohaline currents are created by warm and salty water sinking and rising in the ocean. Water with a higher concentration of salt is more dense and thus sinks into the ocean.