Chemistry of Human Body Review

What two elements make up water?

• Helium and oxygen
• Hydrogen and oxygen
• helium and carbon
• oxygen and carbon

Tags

NGSS.HS-ESS2-5

Attractions between water molecules are called

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

Which is NOT a unique property of water?

• Frozen water floats on liquid water.
• Water covers most of the Earth’s surface and retains a large amount of heat.
• Water molecules stick to each other through hydrogen bonds.
• Water cools very rapidly.

Tags

NGSS.HS-ESS2-5

molecule in which opposite ends have opposite electric charges

• cohesion
• polar molecule
• hydrogen bond
• solution

Tags

NGSS.MS-PS2-3

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

Water makes up approximately 60% of the human body and plays a vital role in regulating body temperature. Which property of water makes it good at regulating temperature?

• Water is a good solvent.
• Water exhibits strong cohesion.
• . Water has an unusual crystalline structure.
• Water has a high capacity for heat.

On the pH scale, an acid is a compound that produces a solution with a pH (a)   7.

What pH does a neutral substance have?

• 5

• 6

• 7

• 8

Which of the following is the weakest acid?

• bananas (pH 5)

• tomatoes (pH 4)

• cheese (pH 6)

• orange juice (pH 3)

What is pH a measure of?

• Density

• Mass

• Hydrogen Ion Concentraion

• Polarity