Unit 2 Chemistry of Life Review

What kind of molecule is water?

• Ionic

• Polar Covalent

• Nonpolar Covalent

• Metallic

Which of the following can water NOT dissolve?

• Salt

• Sugar

• Oil

• Baking Soda

Which part of a water molecule has a Positive Charge?

• The Hydrogen

• The Oxygen

• The Top

• The Bottom

What is the correct chemical formula for water?

• H₂O

• HO₂

• H₂O₂

• ₂H₁O

Tags

NGSS.MS-PS1-1

Which of the following is an example of COHESION?

• water sticking to water

• water sticking to glass

• oil sticking to plastic

• hydrogen sticking to oxygen

Which part of a water molecule has a Negative Charge?

• The Hydrogen

• The Oxygen

• The Left

• The Right

Water is polar. What does that mean?

• it is a molecule with opposite charges on opposite ends

• it is a molecule with no charge

• it is a molecule with identical charges on opposite ends

• it is a molecule with too many protons

Tags

NGSS.HS-PS1-3

Water sticks well to many materials. What term relates to this property of water?

• cohesion

• adhesion

• density

• surface tension

A water strider can skate along the top of a pond because:

• covalent bonds result in water cohesion (surface tension)

• hydrogen bonds result in water cohesion (surface tension)

• water striders have adapted to take advantage of water cohesion

• water striders are afraid of water and avoid it

Large bodies of water do not quickly fluctuate in temperature. Why?

• Water is a solvent.
• Water has a high heat capacity.
• Water acts as a buffer.
• Water is non-polar.

Tags

NGSS.HS-PS3-4