Plastic Ice: A New Phase of Water

What is the newly discovered phase of ice that exhibits properties of both solid ice and liquid water?

• Plastic ice

• Ice VII

• Ice Ih

• Hexagonal ice

Under what conditions was plastic ice observed?

• High temperatures and extreme pressures

• Low temperatures and low pressures

• High temperatures and low pressures

• Low temperatures and extreme pressures

What tool was used to observe the molecular motions in plastic ice?

• Neutron beam

• X-ray diffraction

• Electron microscope

• Infrared spectroscopy

What is the structure of ordinary ice Ih?

• Hexagonal, honeycomb-like shape

• Cubic structure

• Amorphous structure

• Tetragonal structure

What potential role could plastic ice VII play on exoplanets?

• Enhancing the exchange of salts between seafloors and oceans

• Increasing atmospheric pressure

• Reducing surface temperatures

• Blocking sunlight