Our Planet Earth

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"The people I distrust most are those who want to improve our lives but have only one course of action."

Physics

The Changing Earth»
How do we know that the climate has changed? In more recent times, geologists ...
The Changing Earth»
    Why did the world’s climate change? The appearance of ...
The Changing Earth»
Poisonous air The Earth’s original atmosphere was very poisonous. It contained ...
The Changing Earth»
What is an Ice Age? Ice Ages were periods when large parts of the Earth’s surface ...
The Changing Earth»
  What was the Earth like when it was formed? The Earth had probably ...

Chemistry

Volcanoes»
Why do geysers spout hot water? When water seeps through the ground and reaches ...
Volcanoes»
Volcanic bombs A major volcanic eruption can hurl boulders high into the air. These ...
Volcanoes»
What is lava? Lava is molten rock that reaches the Earth’s surface. Its temperature ...
Volcanoes»
What is a volcano? Volcanoes are openings in the Earth’s crust through which molten ...
Our Planet Earth»
  What are metals? Metals are one of the major groups of elements. ...

Biology

Fossils »
  What are fossils? Fossils are the traces of ancient animals and plants ...
INTRODUCTION – PLANET EARTH»
Planet Earth is our home. It is also home to millions of different plants and animals. Like the ...
CHANGING EARTH»
The remains of ancient animals, or ‘fossils’, tell us that our planet and the life on it were ...
ROCKS AND EROSION»
  Rocks are not as permanent as they seem. Rain, wind and freezing weather ...
RICHES OF THE EARTH»
All the metals we use are taken from the Earth. Most of them are found in rocks, combined with ...