Water Crash Course

What unique property does water possess among all substances on Earth?

• It is the only substance that can exist in a plasma state.

• It is the only substance that naturally occurs in solid, liquid, and gas forms.

• It is the only substance that can conduct electricity in all its forms.

• It is the only substance that can be found on every planet.

What is the chemical formula for water, and how are its atoms bonded?

• H3O, with ionic bonds.

• H2O, with metallic bonds.

• H2O, with covalent bonds.

• HO2, with hydrogen bonds.

What property of water allows water molecules to stick together, leading to phenomena like water beading up on surfaces?

• Adhesion

• Capillary action

• Cohesion

• Solvency

Capillary action, where water moves up a narrow tube against gravity, is a result of which two properties of water?

• Solvency and polarity

• Density and surface tension

• Cohesion and adhesion

• Hydrogen bonding and ionic bonding

What were two significant scientific contributions of Henry Cavendish?

• Discovering the law of gravity and inventing the telescope.

• Recognizing hydrogen as a distinct substance and determining the composition of water.

• Developing the theory of relativity and discovering penicillin.

• Formulating the laws of thermodynamics and classifying elements.

What scientist discovered the composition of water?

• Isaac Newton

• Henry Cavendish

• Alfred Wegener

• Ada Lovelace

Why is solid water (ice) less dense than liquid water?

• The water molecules shrink when they freeze.

• The hydrogen bonds form crystalline structures that space molecules further apart.

• Impurities in the water make the ice lighter.

• The air trapped in the ice makes it float.

What would be a major consequence if ice were denser than liquid water?

• Oceans would become warmer, leading to increased evaporation.

• Aquatic ecosystems would thrive due to more stable temperatures.

• Oceans and lakes would freeze solid from the bottom up, destroying aquatic life.

• The Earth's sea levels would significantly decrease.

How does water's high heat capacity benefit Earth's climate?

• It causes rapid temperature fluctuations in coastal areas.

• It allows oceans to act as giant heat sinks, regulating global temperatures.

• It leads to more frequent and intense storms.

• It prevents the formation of clouds and precipitation.