• While freshwater freezes at zero degrees Celsius, seawater generally freezes at minus 1.8 degrees Celsius.
• Around 10% of the world’s land surface and approximately 7% of its oceans are covered by ice.
• Ice reflects 90 percent of the sunlight.
• The world’s oldest ice is at the bottom of the ice sheet on Antarctica. It is thought to be around one million years old.
• The oldest ice on Greenland is around 100,000 years old.
• The ice sheets on Greenland and Antarctica are so big that they affect the force of gravity exerted by the Earth.
