The part of the Earth that consists of water in the form of ice that is on or inside Earth is called the

Which of the following has caused repeating 100,000 year cycle of ice ages in the past?

The energy that drives the Earth system has two main sources heat from the sun and heat flowing out of Earth as it cools.

Climatechange may be linked to changes in the number of ___________ on the surface of the sun

During cold periods called _____________ large part's of the eEarth's surface were covered with huge sheets of ice.

One possible explanation for the past climate change is the movement of the Earth's ____________ from their previous positions