WARM-UP: Properties of water!

What atom in water has a negative charge?

• Oxygen

• Chlorine

• Hydrogen

• Sodium

Which of the following apply to acids?

• Put OH- ions in solution

• Put H+ ions in solution

• More than 7 on the pH scale

• Less than 7 on the pH scale

Water is

• polar

• nonpolar

• ionic

Water is a universal solvent because it...

• It can be found anywhere
• It freezes when it gets cold
• floats when frozen
• Dissolves most substances

Tags

NGSS.HS-ESS2-5

Attractions between water molecules are called

• Covalent bonds
• Ionic bonds
• Polar bonds
• Hydrogen bonds

What word describes when water is attracted to other substances?

• cohesion
• adhesion
• capillary action
• surface tension

Why does ice float?

• As water freezes, it expands and its density decreases.
• As water freezes, it takes up more hydrogen from the atmosphere, causing it to have a greater buoyancy.
• As water freezes, air becomes trapped between the hydrogen bonds of water molecules.
• As water freezes, it takes up more oxygen from the atmosphere, causing it to have a greater buoyancy.

Tags

NGSS.MS-PS1-4

A general definition of cohesion is the attraction of:

• particles of the same substance

• particles of a different substance

The tightness across the surface of water that enables paper clips to float is ____________.

• adhesion
• capillary action
• surface tension
• polarity

What is the only natural substance on Earth found in the liquid, solid, and gas states?

• water
• oxygen
• hydrogen
• metal

Tags

NGSS.MS-PS1-4

NGSS.MS-ESS2-4