成人论坛

  • The natural world

    • Explore weather and climate

      You might think that weather and climate are the same thing, but they are actually different.

    • Explore biomes

      Biomes are areas with a similar climate and landscape.

    • Explore mountains

      Mountains are very high areas of land.

    • Explore volcanoes

      A volcano is an opening in the Earth鈥檚 crust that allows magma, hot ash and gases to escape.

    • Explore earthquakes

      Discover that earthquakes are caused when the Earth's crust pulls and pushes against itself.

    • Explore oceans

      Discover that oceans cover over two-thirds of the Earth's surface.

    • Explore rivers

      Find out how rivers always flow downhill because of gravity.

    • Explore the water cycle

      The water cycle works by using the energy of the Sun to exchange water from oceans and lakes to the atmosphere.